初三易错题汇总(适用优等生)
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初三数学易错题集锦及解析题目1:选择题:下列哪个数既是正数又是负数?A. 0B. 1C. -1D. √2题目2:填空题:计算下列表达式的值:2^3 - 3^2。
题目3:判断题:如果一个三角形的两个内角分别是45°和45°,那么这个三角形一定是等腰直角三角形。
(对/错)题目4:解答题:求解方程:x^2 - 4x + 3 = 0。
题目5:选择题:下列哪个数是绝对值最小的数?A. -1B. 1C. 0D. √2题目6:填空题:如果一个三角形的两个内角分别是45°和45°,那么这个三角形的第三个内角是多少度?题目7:判断题:如果一个三角形的两个内角分别是45°和45°,那么这个三角形一定是等腰直角三角形。
(对/错)题目8:解答题:求解方程:x^2 - 4x + 3 = 0。
题目9:选择题:下列哪个数既是正数又是负数?A. 0B. 1C. -1D. √2题目10:填空题:计算下列表达式的值:2^3 - 3^2。
题目11:判断题:如果一个三角形的两个内角分别是45°和45°,那么这个三角形一定是等腰直角三角形。
(对/错)题目12:解答题:求解方程:x^2 - 4x + 3 = 0。
题目13:选择题:下列哪个数是绝对值最小的数?A. -1B. 1C. 0D. √2题目14:填空题:如果一个三角形的两个内角分别是45°和45°,那么这个三角形的第三个内角是多少度?题目15:判断题:如果一个三角形的两个内角分别是45°和45°,那么这个三角形一定是等腰直角三角形。
(对/错)题目16:解答题:求解方程:x^2 - 4x + 3 = 0。
题目17:选择题:下列哪个数既是正数又是负数?A. 0B. 1C. -1D. √2题目18:填空题:计算下列表达式的值:2^3 - 3^2。
题目19:判断题:如果一个三角形的两个内角分别是45°和45°,那么这个三角形一定是等腰直角三角形。
九年级上册数学错题集70道一、一元二次方程部分(1 10题)1. 若关于公式的一元二次方程公式的常数项为公式,求公式的值。
解析:因为方程是一元二次方程,所以二次项系数不为公式,即公式,解得公式。
又因为常数项公式,分解因式得公式,解得公式或公式。
综合前面公式的条件,所以公式。
2. 用配方法解方程公式。
解析:在方程两边加上一次项系数一半的平方,即公式。
变形为公式,移项得到公式。
然后开平方得公式,解得公式。
3. 解方程公式。
解析:对于方程公式,分解因式得公式。
则公式或者公式,解得公式或者公式。
4. 关于公式的方程公式的根的情况是()A. 有两个不相等的同号实数根B. 有两个不相等的异号实数根C. 有两个相等的实数根D. 没有实数根解析:对于一元二次方程公式,判别式公式,在方程公式中,公式,公式,公式。
则公式。
因为公式,所以公式,方程有两个不相等的实数根。
设方程的两根为公式,公式,根据韦达定理公式,两根异号,所以方程有两个不相等的异号实数根,答案为B。
5. 若公式是方程公式的一个根,则公式____。
解析:把公式代入方程公式,得到公式,即公式。
6. 已知一元二次方程公式的两根是公式,公式,则公式____。
解析:由韦达定理可知,在方程公式中,公式,公式。
公式。
把公式,公式代入得公式。
7. 解方程公式。
解析:移项得公式。
提取公因式公式得公式,即公式。
解得公式或公式。
8. 已知关于公式的方程公式有两个不相等的实数根。
(1)求实数公式的取值范围;解析:对于一元二次方程公式,判别式公式,在方程公式中,公式,公式,公式。
公式展开得公式合并同类项得公式。
因为方程有两个不相等的实数根,所以公式,即公式,解得公式。
(2)设方程的两个实数根分别为公式,公式,是否存在这样的实数公式,使得公式?若存在,求出这样的公式值;若不存在,请说明理由。
解析:由韦达定理得公式,公式,所以公式,公式同号。
当公式,公式时,公式。
公式。
把公式,公式代入得公式。
初三数学易错题代数第一章∶一元二次方程1、解方程1112-=+-x m x x 的过程中若会产生增根,则m=____2.关于x 的方程m 2x 2+(2m +1)x +1=0有两个不相等的根,求m 的取值范围__ 3,若关于x 的方程ax 2-2x +1=0有实根,那a 范围____4,已知方程3x 2-4x -2=0,则x 1-x 2=___,大根减小根为____ 5,以251+-和251--的一元二次方程是____6,若关于x 的方程(a+3)x 2-(a 2-a -6)x +a=0的两根互为相反数,则a=___7,已知a,b 为不相等的实数,且a 2-3a +1=0,b 2-3b+1=0则a b +ba=___8,方程ax 2+c=0(a ≠0)a,c 异号,则方程根为_____ 9,若方程3x 2+1=mx 的二次项为3x 2,则一次项系数为_____ 23,分解因式4x 2+8x +1=_____24,若方程2x 2+3x -5=0的两根为x 1 ,x 2 则x 12+x 22=_____ 25,方程组有两组相同的实数解,则k=___方程组的解为___43,若x 是锐角,cosA 是方程2x 2-5x +2=0的一个根,则∠A=___1、已知:Rt △ABC 中,∠C=900,斜边c 长为 5 ,两条直角边a,b 的长分别是x 2-(2m-1)x+4(m-1)=0的两根,则m 的值等于 ( ) A. –1 B. 4 C.-4或1 D. –1或4. 2、已知关于x 的方程012)32(2=+--x m x m 有两个不相等的实数根,则m 的范围是:( ) A .m<3 B. 233≠<m m 且 C. 0,233≠≠<m m m 且 D. 2330≠<≤m m 且 3、已知方程①01222=+-x x ,②041x =+-,③1122=++++x x x x ,④0x 12x =---,⑤01)12(2=-+++k x k x 其中一定有...实数解的方程有 A 、1个 B 、2个 C 、3个 D 、4个5、已知 ,012=-+m m 那么代数式2001223-+m m 的值是 ( ) (A)2000 (B)-2000 (C)2001 (D)-2001 6,下面解答正确的是( )A , 分式的值是零,x=-2或x=1B, 实数范围内分解因式2x 2+x -2=)4171)(4171(+-----x x C, x=-1是无理方程22-2x +7x =-x的根D, 代数式x 2+2x -1通过配方法知x=-1时,它有最小值是-27,关于x 的方程x 2-mx +n=0有一正一负的两实根,且负根绝对值较大,则( ) A , n >0, m <0 B,n>0, m >0, C, n<0 m>0 D,n <0 m<0 8,若x =-b+b 2+4ac 2a则有( )A ,ax 2+bx+c=0 B,ax 2+bx-c=0 C,ax 2-bx+c=0 D, ax 2-bx-c=09、在Rt △ABC 中,∠C=900,a 、b 、c 分别是∠A 、∠B 、∠C 的对边,a 、b 是关于x 的方程0772=++-c x x 的两根,那么AB 边上的中线长是( )(A ) 23 (B )25(C ) 5 (D )220,已知关于x 的方程x 2+px +q=0的两根为x 1=-3 x 2=4,则二次三项式x 2-px +q=( ) A.(x +3)(x -4) B, (x -3)(x +4) C,(x +3)(x +4)D,(x -3)(x -4)三, 解答题1,甲乙二人合作一项工程,4天可完成,若先有甲单独做3天,剩下的由乙独做,则以所用的时间等于甲单独完成这项工程的时间,求甲乙二人单独完成此项工程各需几天?2,解方程mnx 2-(m 2+n 2)x +mn=0 (mn ≠0)3,在⊿ABC 中,∠A ∠B ∠C 的对边分别为a,b,c 且a,b 是关于x 的方程∶x 2-(c +4)x+4c +8=0的两根,若25asinA=9c,求⊿ABC 的面积第二章∶函数第一节∶平面直角坐标系22,平面直角坐标系中,点A (1-2a,a-2)位于第三象限且a 为整数,则点A 的坐标是_____10、已知点()2,1+-a a M 在第二象限,则a 的取值范围是( )(A )2->a (B )12<<-a (C )2-<a (D )1>a14、若点M (x -1,1-y )在第一象限,则点N (1-x ,y -1)关于x 轴的对称点在( ) A 、第一象限 B 、第二象限 C 、第三象限 D 、第四象限第二节∶函数 11、函数321+=x y 中,自变量x 的取值范围是____12、函数x x y -+=0的自变量的取值范围是_____1,锐角三角形ABC 内接于⊙O ,∠B=2∠C ,∠C 所对圆弧的度数为n ,则n 的取值范围是 ( )A, 0°<n <45° B, 0°<n <90° C, 30°<n <45° D,60°<n <90° 第三节∶一次函数15,当___时,函数y=(m +3)x2m +3+4x -5(x ≠0)是一个一次函数。
汇总一、单选1. ---How are you going to meet your aunt at the airport _____ Thursday morning?---I’m going there _____ my car.A. on, inB. on, byC. in, byD. in, in答案:A解析:具体某日的早、午、晚要用介词on,by car,by后无冠词或代词,in one’s car,in后有冠词或介词。
2. _____ big success the film was!A. What anB. What aC. How aD. How答案:B解析:success,pleasure等抽象名词前若有形容词修饰,要加冠词a/an。
3.______ the teachers in their school is about 200 and one fourth(四分之一) of them are________ teachers.A. A number of; womenB. A number of; womanC. The number of; womenD. The number of; woman答案:C解析:a number of“许多……”,the number of“……的数量”,两者后都接可数名词复数,名词前有woman或man限定,变复数要两者都变。
4.A lot of enjoyment is given _______many people.A.atB.forC.toD.with答案:C解析:give,offer等接双宾的动词,若将将直宾(物)提前,要加介词to或for,具体接to 还是for由动词决定。
5.Y ou should do more ____.Don‖t always be at the desk doing your _____.A.exercise,exercisesB.exercises,exercisesC.exercise,exerciseD.exercises,exercise答案:A解析:exercise当“锻炼”讲,不可数,当“练习”讲,可数。
数学九年级上册易错题一、选择题(1 - 10题)1. 一元二次方程x^2-2x - 3 = 0的根的情况是()- A. 有两个相等的实数根。
- B. 有两个不相等的实数根。
- C. 没有实数根。
- D. 无法确定。
- 解析:对于一元二次方程ax^2+bx + c = 0(a≠0),其判别式Δ=b^2-4ac。
在方程x^2-2x - 3 = 0中,a = 1,b=-2,c=-3,则Δ=(-2)^2-4×1×(-3)=4 + 12=16>0。
当Δ>0时,方程有两个不相等的实数根,所以答案是B。
2. 若关于x的一元二次方程(m - 1)x^2+5x+m^2-3m + 2 = 0的常数项为0,则m的值等于()- A. 1.- B. 2.- C. 1或2。
- D. 0.- 解析:因为方程的常数项为0,所以m^2-3m + 2 = 0,即(m - 1)(m - 2)=0,解得m = 1或m = 2。
又因为方程是一元二次方程,二次项系数m - 1≠0,即m≠1,所以m = 2,答案是B。
3. 二次函数y = x^2-2x + 3的顶点坐标是()- A. (1,2)- B. (-1,2)- C. (1, - 2)- D. (-1,-2)- 解析:对于二次函数y=ax^2+bx + c(a≠0),其顶点坐标的横坐标x =-(b)/(2a),纵坐标y=frac{4ac - b^2}{4a}。
在y = x^2-2x + 3中,a = 1,b=-2,c = 3,x =-(-2)/(2×1)=1,y=frac{4×1×3-(-2)^2}{4×1}=(12 - 4)/(4)=2,所以顶点坐标是(1,2),答案是A。
4. 已知二次函数y = ax^2+bx + c(a≠0)的图象如图所示,则下列结论中正确的是()- A. a>0- B. c<0- C. 3是方程ax^2+bx + c = 0的一个根。
人教版九年级数学易错题收集整理+常见数学易错题精选人教版九年级数学易错题成长系列1、二次函数2y ax bx c =++图像如图所示,则下列结论正确的是( )A.20,0,0,40a b c b ac <<>-> B.20,0,0,40a b c b ac ><>-< C.20,0,0,40a b c b ac <><-> D.20,0,0,40a b c b ac <>>-> 如图,二次函数2y ax bx c =++的图像过(-1,1),(2,-1)两点,下列关于这个二次函数的叙述正确的是( )A. 当0x =时,y 的值大于1B. 当3x =时,y 的值小于0C. 当1x =时,y 的值大于1D. y 的最大值小于02、二次函数2y ax bx =+的图像如图,若一元二次方程20ax bx m ++=有实数根,则m 的最大值为( )A. -3B. 3C. -5D. 94、设二次函数2y x bx c =++,当1x ≤时,总有0y ≥,当13x ≤≤时,总有0y ≤,那么c 的取值范围是 。
5、已知抛物线212y x bx =+经过点A (4,0)。
设点C (1,-3),请在抛物线的对称轴上确定一点D ,使得|AD-CD|的值最大,则D 的坐标为 。
6、已知:关于x 的方程2(13a)210ax x a --+-=(1)当a 取何值时,二次函数2(13a)21y ax x a =--+-的对称轴是x=-2? (2)求证:a 取任何实数时,方程2(13a)210ax x a --+-=总有根。
7、如图,抛物线254y ax x a =-+与x 轴相交于A 、B ,且过点C (5, 4)。
(1)求a 的值和该抛物线的顶点P 的坐标(2)请你设计一种平移方法,使平移之后抛物线的顶点落在第二象限,并写出平移后抛物线的解析式。
初三易错题题集1、下列用量不正确的是A、没有说明用量,液体取 2mL— 4mL B 、酒精灯的酒精不超过容积的 2/3 C、加热时,液体不超过试管的 1/3 D 、洗涤试管时,注入半试管水2、下列物质中属于澄清物的是A、洁净的食盐水C、净化后的空气BD、冰水混合物、高锰酸钾完全分解后的剩余物3.不能说明分子间有间隔的是A、物质的热胀冷缩现象B、食盐溶解在水中C、食盐和蔗糖混合均匀D、等质量的氧气和液氧,氧气体积比液氧大4.决定元素种类的依据是A、质子数B、中子数C、核外电子数D、原子的相对原子质量5.日常生活中,与肥皂水作用容易起泡沫的是A、珠江水B、矿泉水C、煮沸的水D、含较多可溶性钙、镁化合物的水6.27 克铝箔在充足的氧气中完全燃烧,燃烧后的生成物的总质量是A、约等于27 克B、一定小于27 克C、一定大于27 克D、一定等于27 克7.下列各组物质按混合物、澄清物、单质、化合物分类正确的是A、空气、糖水、一氧化碳、铁粉B、空气、水、金刚石、氯酸钾C、空气、氮气、氢气、澄清石灰水D、空气、矿泉水、红磷、高锰酸钾8.下列物质不可能与水形成饱和溶液的是A、酒精B、熟石灰C、二氧化碳D、硝酸钾9.在①碘酒②糖水③ 70%的酒精④稀硫酸等几种溶液中,溶剂是同一种物质的是A、①③B、②④C、①②③D、②③④10.用浓盐酸配制一定溶质质量分数的稀盐酸,实验时必不可少的一组仪器是A、量筒、烧杯、漏斗、玻璃棒B、托盘天平、玻璃棒、药匙、烧杯C、托盘天平、玻璃棒、量筒、烧杯D、玻璃棒、量筒、烧杯、胶头滴管11.在相同温度时,食盐的饱和溶液和不饱和溶液的溶质质量分数大小关系是A 、前者大于后者B 、后者大于前者C 、两者相等D、无法比较12. 下列物质中铁的质量分数最小的是()A 、FeO B、Fe2O3C、Fe3O4D、FeS13. 许多化学反应都可在溶液中进行的原因是()A 、操作简便,设备简单B 、用料节约,减少成本C 、可加快反应速率,缩短反应时间D、固体物质间不能直接反应14. 二氧化碳气体通人石蕊试液后,再加热溶液,最后溶液的颜色为()。
九年级语数英三科高频易错题集和答案详细分析九年级语文高频错题集1.【题文】下列词语中没有错别字的一项是()A.次第起源榆叶梅北燕南飞B.纬度侯鸟桃花开周而复始C.刺槐连翘逆温层冰雪融化D.采集悬殊生态学哀草连天2.【题文】3.【题文】下列语言表述得体的一项是()A.我常常想,那些虚长我几岁的哥哥姐姐,是怎样让自己的青春年华变得充实自在而又缤纷多彩的。
B.自从上次班主任老师造访我家后,我和爸爸妈妈的关系逐步变得融洽和谐。
C.我们载歌载舞,热烈欢迎四面八方的客人莅临学校。
D.在朋友家,我发现这个原本冷冷清清的地方因为我们的欢声笑语而蓬荜生辉,温馨美好。
4.【题文】下列加点字的注音全都正确的一项是()A.蓼溆(liǎo xù)麈尾(lù)捉弄(zhuō)镶金(xiāng)B.银箸(zhuó)岔气(chà)促狭(xiá)丫鬟(huan)C.戗金(qiàng)漱盂(shù)发怔(zhèng)潇湘(xiāo)D.琥珀(pò)筵席(yàn)调停(tiáo)撑船(chēng)5.【题文】下列句中没有语病的一项是()A.上下几千年,知名的书法家很多,但谁也不能否认,王羲之不是继往开来的宗师。
B.琴棋书画,博大精深,玄妙无穷。
它在纵横线条中凝聚哲思,于黑白方圆中演绎热情。
C.虽然好天气让百姓的菜篮子轻松了,却让不少蔬菜批发商、商户和菜农发了愁。
D.当你不去旅行、不去冒险、不过没试过的生活,每天只是挂着QQ,刷着微博,逛着淘宝,干着80岁都能做的事情,那么你要青春有什么用!6.【题文】下列句子中没有语病的一项是()A.近年来科学家发现了一种憎水玻璃,为戴眼镜的人解除了苦恼。
B.校长、副校长和其他学校领导出席了这届毕业典礼。
C.只有对老师所提的问题理解到位,就能回答得清楚明了。
D.目前,中国运载火箭技术研究院已经启动长征九号的关键技术研制。
九年级数学易错题及解析(类型归纳)
平行线的性质和判定。
错误原因:学生在运用平行线的判定和性质时,容易出现混淆和错误。
解析:
学生需要熟练掌握平行线的判定和性质,并能够正确运用到题目中。
同时,需要注意平行线的判定和性质的不同之处,不要混淆使用。
三角形的内角和定理。
错误原因:学生在运用三角形的内角和定理时,容易出现计算错误或定理运用不当等问题。
解析:
学生需要熟练掌握三角形的内角和定理,并能够正确运用到题目中。
同时,需要注意定理的适用范围和特殊情况的处理方式。
一元二次方程的解法。
错误原因:学生在解一元二次方程时,容易出现计算错误或忽略判别式的限制条件等问题。
解析:
学生需要熟练掌握一元二次方程的解法,并能够正确运用到题目中。
同时,需要注意判别式的限制条件和特殊情况的处理方式。
圆的相关知识。
错误原因:学生在学习圆的相关知识时,容易出现概念不清、定理理解不准确等问题。
解析:
学生需要熟练掌握圆的相关知识,并能够正确运用到题目中。
同时,需要注意圆的相关定理和性质的适用范围和特殊情况的处理方式。
最全最完整初三数学易错题集(全)
本文将为初三数学的学生提供一份最全最完整的易错题集,以帮助他们更好地复数学知识。
本文共包括以下几个部分:
一、概率统计
这一部分为初三数学中概率统计部分常见的易错题集,主要包括计数原理、概率公式等知识点。
这些题目均为根据历年试题整理而成。
二、平面几何
这一部分为初三数学中平面几何部分常见的易错题集,主要包括角度、三角形、圆等知识点。
这些题目均为根据历年试题整理而成。
三、立体几何
这一部分为初三数学中立体几何部分常见的易错题集,主要包括空间几何体积、表面积、棱锥、棱柱、圆柱、圆锥等知识点。
这些题目均为根据历年试题整理而成。
四、代数式与方程式
这一部分为初三数学中代数式与方程式部分常见的易错题集,主要包括多项式基本操作、一次方程式、二次方程式等知识点。
这些题目均为根据历年试题整理而成。
五、欧氏几何
这一部分为初三数学中欧氏几何部分常见的易错题集,主要包括向量、坐标系、函数基本知识等。
这些题目均为根据历年试题整理而成。
本文所提供的易错题集是初三数学复习过程中的重要资料,希望各位同学认真复习,并取得好成绩!。
初三上学期数学错题集(一元二次方程)(一) 2012.09.09已打印1、若方程(m-2)x㎡-2+mx2=7是关于x的一元二次方程,则m的值为。
2、根据题意,列出方程:(不必求解,写出一般形式)学校图书馆去年年底有图书5万册,预计到明年年底增加到7.2万册,求这两年的平均增长率。
3、方程x2=0的实数根有()A.0个B.1个C.2个D.1个或2个4、下列二次三项式中,是完全平方式的是(填序号)。
①9x2-12xy+4y2;②4y2-4y-1;③x2-25x+5;④2x2-4x+1;5、写出一个一元二次方程,使它的两根:一根是正数,另一根在-2与-1之间。
6、方程(x-2)(x+3)=6的解是()A.x1=-4,x2=3 B.x1=2,x2=3C.x1=2,x2=-3 D.x1=4,x2=-37、用因式分解法解方程5(x+3)-2x(x+3)=0,可把它化为两个一元一次方程、求解。
初三上学期数学错题集(一元二次方程)(二)2012.09.15已打印1、解方程:(1)3y(y-1)2=2-2y (2)7 x2=21x (3)(x2+1)2-3(x2+1)-28=02、若△ABC的边长都是方程x2-10x+21=0的根,求△ABC的周长。
3、若△ABC 的边长都是方程x 2-7x+12=0的根,求△ABC 的周长。
4、已知P=157m-1,Q= m 2-158m(m 为任意实数),则P 、Q 的大小关系为 ( ) A .P<Q B. P=Q C. P>Q D.不能确定 5、关于x 的方程(k+1)x 2+2(k+1) x+k=0无实数根,则k 的取值范围是 。
6、已知a 是整数,满足⎩⎨⎧>->+023013a a 试解关于x 的一元二次方程x 2-4=x(ax-3).7、k 为何值时,关于x 的方程(k-1)x 2-(2k+1) x+k+1 = 0(1)有一解?(2)有两个不相等的实数根?8、已知△ABC 的两边AB 、AC 的长是关于x 的一元二次方程x 2-(2k+1) x+k(k+1) = 0的两个实数根,第三边BC 的长为5.(1)k 为何值时,△ABC 是以BC 为斜边的直角三角形?(2)k 为何值时,△ABC 是等腰三角形?并求△ABC 的边长。
初中数学选择、填空、简答题易错题集锦及答案一、选择题1、A 、B 是数轴上原点两旁的点,则它们表示的两个有理数是( C )A 、互为相反数B 、绝对值相等C 、是符号不同的数D 、都是负数 2、有理数a 、b 在数轴上的位置如图所示,则化简|a-b|-|a+b|的结果是( A ) A 、2a B 、2b C 、2a-2b D 、2a+b3、轮船顺流航行时m 千米/小时,逆流航行时(m-6)千米/小时,则水流速度( B ) A 、2千米/小时 B 、3千米/小时 C 、6千米/小时 D 、不能确定4、方程2x+3y=20的正整数解有( B )A 、1个B 、3个C 、4个D 、无数个 5、下列说法错误的是( C )A 、两点确定一条直线B 、线段是直线的一部分C 、一条直线是一个平角D 、把线段向两边延长即是直线6、函数y=(m 2-1)x 2-(3m-1)x+2的图象与x 轴的交点情况是 ( C ) A 、当m ≠3时,有一个交点 B 、1±≠m 时,有两个交 C 、当1±=m 时,有一个交点 D 、不论m 为何值,均无交点7、如果两圆的半径分别为R 和r (R>r ),圆心距为d ,且(d-r)2=R 2,则两圆的位置关系是( B ) A 、内切 B 、外切 C 、内切或外切 D 、不能确定8、在数轴上表示有理数a 、b 、c 的小点分别是A 、B 、C 且b<a<c ,则下列图形正确的是( D )A B C D 9、有理数中,绝对值最小的数是( C ) A 、-1 B 、1 C 、0 D 、不存在 10、21的倒数的相反数是( A )A 、-2B 、2C 、-21 D 、2111、若|x|=x ,则-x 一定是( B )A 、正数B 、非负数C 、负数D 、非正数12、两个有理数的和除以这两个有理数的积,其商为0,则这两个有理数为( C ) A 、互为相反数 B 、互为倒数 C 、互为相反数且不为0 D 、有一个为0 13、长方形的周长为x ,宽为2,则这个长方形的面积为( C ) A 、2x B 、2(x-2) C 、x-4 D 、2·(x-2)/2 14、“比x 的相反数大3的数”可表示为( C ) A 、-x-3 B 、-(x+3) C 、3-x D 、x+3 15、如果0<a<1,那么下列说法正确的是( B ) A 、a 2比a 大 B 、a 2比a 小C 、a 2与a 相等D 、a 2与a 的大小不能确定16、数轴上,A 点表示-1,现在A 开始移动,先向左移动3个单位,再向右移动9个单位,又向左移动5个单位,这时,A 点表示的数是( B )A 、-1B 、0C 、1D 、817、线段AB=4cm ,延长AB 到C ,使BC=AB 再延长BA 到D ,使AD=AB ,则线段CD 的长为( A )A 、12cmB 、10cmC 、8cmD 、4cm 18、21-的相反数是( B ) A 、21+B 、12- C 、21-- D 、12+-19、方程x(x-1)(x-2)=x 的根是( D )A 、x 1=1, x 2=2B 、x 1=0, x 2=1, x 3=2C 、x 1=253+, x 2=253-D 、x 1=0,x 2=353+, x 3=253-20、解方程04)1(5)1(322=-+++xx x x 时,若设yx x =+1,则原方程可化为( B )A 、3y 2+5y-4=0 B 、3y 2+5y-10=0 C 、3y 2+5y-2=0 D 、3y 2+5y+2=021、方程x 2+1=2|x|有( B )A 、两个相等的实数根;B 、两个不相等的实数根;C 、三个不相等的实数根;D 、没有实数根 22、一次函数y=2(x-4)在y 轴上的截距为( C ) A 、-4 B 、4 C 、-8 D 、823、解关于x 的不等式⎩⎨⎧-<>a x ax ,正确的结论是( C )A 、无解B 、解为全体实数C 、当a>0时无解D 、当a<0时无解 24、反比例函数xy 2=,当x ≤3时,y 的取值范围是( C ) A 、y ≤32 B 、y ≥32C 、y ≥32或y<0D 、0<y ≤3225、0.4的算术平方根是( C ) A 、0.2 B 、±0.2 C 、510D 、±51026、李明骑车上学,一开始以某一速度行驶,途中车子发生故障,只好停车修理,车修好后,因怕耽误时间,于时就加快了车速,在下列给出的四个函数示意图象,符合以上情况的是( D )A B C D27、若一数组x 1, x 2, x 3, …, x n 的平均数为x ,方差为s 2,则另一数组kx 1, kx 2, kx 3, …, kx n的平均数与方差分别是( A )A 、k x , k 2s 2B 、x , s 2C 、k x , ks 2D 、k 2x , ks 228、若关于x 的方程21=+-ax x 有解,则a 的取值范围是( B ) A 、a ≠1 B 、a ≠-1 C 、a ≠2 D 、a ≠±129、下列图形中既是中心对称图形,又是轴对称图形的是( A )A 、线段B 、正三角形C 、平行四边形D 、等腰梯形30、已知dcb a =,下列各式中不成立的是( C ) A 、d c b a d c b a ++=-- B 、d b c a d c 33++= C 、bd ac b a 23++= D 、ad=bc 31、一个三角形的三个内角不相等,则它的最小角不大于( D ) A 、300 B 、450 C 、550 D 、60032、已知三角形内的一个点到它的三边距离相等,那么这个点是( C )A 、三角形的外心B 、三角形的重心C 、三角形的内心D 、三角形的垂心 33、下列三角形中是直角三角形的个数有( B )①三边长分别为3:1:2的三角形 ②三边长之比为1:2:3的三角形 ③三个内角的度数之比为3:4:5的三角形 ④一边上的中线等于该边一半的三角形 A 、1个 B 、2个 C 、3个 D 、4个 34、如图,设AB=1,S △OAB =43cm 2,则弧AB 长为( A )A 、3πcm B 、32πcm C 、6πcm D 、2πcm 35、平行四边形的一边长为5cm ,则它的两条对角线长可以是( D )A 、4cm, 6cmB 、4cm, 3cmC 、2cm, 12cmD 、4cm, 8cm36、如图,△ABC 与△BDE 都是正三角形,且AB<BD ,若△ABC 不动,将△BDE 绕B 点旋转,则在旋转过程中,AE 与CD 的大小关系是( A )A 、AE=CDB 、AE>CDC 、AE>CD D 、无法确定37、顺次连结四边形各边中点得到一个菱形,则原四边形必是( A ) A 、矩形 B 、梯形 C、两条对角线互相垂直的四边形 D 、两条对角线相等的四边形 38、在圆O 中,弧AB=2CD ,那么弦AB 和弦CD 的关系是(C )A 、AB=2CDB 、AB>2CDC 、AB<2CD D 、AB 与CD 39、在等边三角形ABC 外有一点D ,满足AD=AC ,则∠BDC 的度数为( D ) A 、300 B 、600 C 、1500 D 、300或150040、△ABC 的三边a 、b 、c 满足a ≤b ≤c ,△ABC 的周长为18,则( C )A 、a ≤6B 、b<6C 、c>6D 、a 、b 、c 中有一个等于641、如图,在△ABC 中,∠ACB=Rt ∠,AC=1,BC=2,则下列说法正确的是( C )A 、∠B=300B 、斜边上的中线长为1C 、斜边上的高线长为552D 、该三角形外接圆的半径为142、如图,把直角三角形纸片沿过顶点B 的直线BE (BE 交CA 于E 直角顶点C 落在斜边AB 上,如果折叠后得到等腰三角形EBA ,那么下列结论中(1)∠A=300(2)点C 与AB 的中点重合 (3)点E 到AB 的距离等于CE 的长,正确的个数是( D ) A 、0 B 、1 C 、2 D 、343、不等式6322+>+x x 的解是( C )A 、x>2B 、x>-2C 、x<2D 、x<-244、已知一元二次方程(m-1)x 2-4mx+4m-2=0有实数根,则m 的取值范围是( B ) A 、m ≤1 B 、m ≥31且m ≠1 C 、m ≥1 D 、-1<m ≤1 AB45、函数y=kx+b(b>0)和y=xk-(k ≠0),在同一坐标系中的图象可能是( B ) A B C D46、在一次函数y=2x-1的图象上,到两坐标轴距离相等的点有( B )A 、1个B 、2个C 、3个D 、无数个 47、若点(-2,y 1)、(-1,y 2)、(1,y 3)在反比例函数xy 1=的图像上, 则下列结论中正确的是( D )A 、y 1>y 2>y 3B 、y 1<y 2<y 3C 、y 2>y 1>y 3D 、y 3>y 1>y 2 48、下列根式是最简二次根式的是( B ) A 、a 8 B 、22b a + C 、x 1.0 D 、5a49、下列计算哪个是正确的( D )A 、523=+B 、5252=+C 、b a b a +=+22D 、212221221+=-50、把aa 1--(a 不限定为正数)化简,结果为( B )A 、aB 、a- C 、-aD 、-a-51、若a+|a|=0,则22)2(a a +-等于( A ) A 、2-2a B 、2a-2 C 、-2 D 、252、已知02112=-+-x x ,则122+-x x 的值( C ) A 、1 B 、±21 C 、21D 、-2153、设a 、b 是方程x 2-12x+9=0的两个根,则b a +等于( C )A 、18B 、6C 、23D 、±2354、下列命题中,正确的个数是( B )①等边三角形都相似 ②直角三角形都相似 ③等腰三角形都相似④锐角三角形都相似 ⑤等腰三角形都全等 ⑥有一个角相等的等腰三角形相似⑦有一个钝角相等的两个等腰三角形相似 ⑧全等三角形相似A 、2个B 、3个C 、4个D 、5个 二、填空题1、如果一个数的绝对值等于它的相反数,那么这个数一定是_____非正数____。
初三易错题汇总适用优等生乐享集团公司,写于2021年6月16日初三语法易错题汇总适合优质学员二模提高冲刺使用1. When heretiredat 65, he ____ painting in over 20 cities in Europe and Asia.A. teachesB. has taughtC. had taughtD. would teach解析:C. 时态的考查,teach是发生在retired之前,故是过去的过去,用过去完成时态;2. --______ did the winner of the bicycle race ride—At the speed of40km/h.A. How longB. How fastC. How muchD. How far解析:B.根据答句可以得出是对速度的提问,故用how fast.3. Alice ,________her friends,always takes a long walk after supper.A. bothB. as well asC. but alsoD. And解析:B.主谓一致问题;根据takes可以得出句子的主语是第三人称单数,故是就远原则,考生应清晰的掌握就近原则和就远原则.4. Hey,boywould you like to show me your _______handA. the othersB. the otherC. otherD. Another解析:C. 考查不定代词;常考搭配:one...the other;some...others;考生要清楚one...the other中the可以换成相应的形容词性物主代词5. The manager is much better than other employees________dealing with the customers’ complaints.A. inB. atC. onD. Of解析:B. 词组be good at的固定搭配,此题为比较级;6 .I hear that you have been to Wenzhen. Did you like it How long _______ you ________thereA.do.....stayB. have .....stayedC. did.....stayD. had .....stayed解析:C. 动词时态的考查,此题没有侧重对现在造成的影响,故直接用一般过去时态;7. The sea wave reached 10 meters in the storm.对划线部分提问_________ ___________was the sea wave in the storm对划线部分提问解析:How high. 特殊疑问句的考查,学生需掌握how相关的特殊疑问句含义;8. Martine doesn’t play for the school football team any longer.保持句子意思不变Martine is _________ _________ a member of the school football team .解析:not any longer=no longer.9. During the test,our teacher stopped us from talking with each other.保持句子意思不变Our teacher didn’t ________us __________talk with each other during the test.解析:stop sb from doing sth=don’t allow sb to do sth.10. The factory decided to increase production to meet the needs of more customers.保持句子意思不变The factory decided to increase production to _________ the ________ of more customers.解析:meet one’s needs=satisfy one’s demand.11. The thief finally said that he stole the valuable necklace from the lady.保持句子意思不变The thief finally __________ __________ the valuable necklace from the lady.保持句子意思不变解析:承认做过某事;Admit doing sth12. Did Maggie fly to New York on her own He wondered.合并成一句话He wondered if Maggie _________ _________to New York on her own解析:宾语从句的考查;Had flown13. The baby pandas weigh about 150 grams on average.对划线部分提问__________ _________do the baby pandas weigh on average__________ _________is the baby pandas on average______________ the _________ of the baby pandas on average解析:How weigh;How heavy;What’s weight 对重量的三种提问方式14. Helen returned the magazine to the library after reading it.保持句子意思不变Helen __________ __________the magazine to the library after reading it.保持句子意思不变解析:return=give back to, 同义词组的积累15. It is necessary for us to review what we have just learned in time .保持句子意思不变It is necessary for us to _____ __________what we have just learned in time .解析:review=go over,复习回顾;16. selects his words very carefully when he speaks in public.保持句子意思不变selects his words with________ ________ when he speaks in public.解析:carefully=with great care, 仔细的小心的17. As it is said by Joyce,the link method is a basic way of improving our memory.保持句子意思不变_________ _______Joyce,the link method is a basic way of improving our memory.解析:As it is said by sb=According to sb. 根据某人的观点;18. You can pay the bill in cash. You can pay the bill by credit card.保持句子意思不变You can pay the bill_______ in cash_______by credit card.解析:either...or,21. The boys like having sports better than chatting with their friends on .保持句子意思不变The boys ________ having sports________ chatting with their friends on .解析: prefer doing sth to doing sth=like doing better than doing sth.22. Tim doesn’t like collecting coins. Jack doesn’t like collecting coins,either.合并成一句话________Tim ________Jack likes collecting coins.解析:Neither nor23. He frightened me because he made a strange sound behind me suddenly. 保持句意基本不变He__________ me a__________ because he made a strange sound behind me suddenly .解析:frighten sb=give sb a fright. 动词词意和名词之间的转换;24. I bought the English-Chinese dictionary two years ago. 保持句意不变I __________ __________ the English-Chinese dictionary for two years.解析:have kept;短暂性动词和延续性动词的转换;错题整理1.People all think the cartoon Zoopia is interesting and wonderful. 对划线的部分提问____ do people ____ the cartoon How, like解析:容易误写成What like.2.There ____ an aple and some bananas in the black bag just now.A. is B, were C. was D. are C解析:there be 就近原则,此外还考察just now是过去时的重要标志;3.- Don’t worry. Your bag ____ here until you come back. So enjoy shopping in our supermarket.- Thanks.A. will keepB. was keptC. has been keptD. will be kept D解析:根据语言情景可得出超市店员在向顾客说明包会被保存好,是将要发生的事情;4.- Excuse me. Can you tell me ______-Sorry, I don’t know.A.that where is a trainB.which train can I takeC.when the train leavesD.where does the train goes C解析:复合疑问句的从句是陈述语序,火车是在固定时刻出发的,所以是客观事实,用一般现在时表将来;5.Middle school students usually have ____ one-day visiting in the countryside in spring.A. aB. anC. theD. / A解析:one的发音是wn,首字母并不是元音,故不能用an;6.Ann’s got a chance to go abroad as an exchange student ,_____sheA. doesn’tB. isn’tC. hasn’tD. wasn’t C解析:根据题目中的has got得知此题为现在完成时,所以选择C;7.Jim will take up drawing as his hobby when he ____ the age of five.A. reducedB. reachedC. with reachD. has reached B解析:判断后半句的动词时态关键在于the age of five,已经是过去时态,所以选择B;8.Don’t let such a thing ____ again, or you will probably lose your job.A. happenB. happensC. to happenD. happening A解析:整个句子是祈使句,意在警告他人该如何做,故动词用原型;9.Hans is the second ____ boy in his class.A. tallB. tallerC. tallestD. the tallest C解析:表达第几“高/大/瘦”要用最高级,且最高级前不加冠词the;10.Miss Brown would like to know ____.A. when will she get a new computer from her father.B. when she would get a new computer from her fatherC. when would she get a new computer from her fatherD. when she will get a new computer from her father D解析:从句遵从陈述语序,疑问词+主语+动词,故选D;历年基础易错题1. Hans is ______honest. He is often praised by his teachers and friends.A aB anC theD /解析:B. 冠词的考查;A/an/the 三者之间的区别, honest/hour/honor这三个单词中的h是不发音的,故第一个音标是元音;2. The library of our neighbourhood ___________ ten hours a day.A. opensB. is openC. has openedD. is opened解析:B. Open这个词的词性有两个,一是动词,二是形容词,这里be open表示一种开放的状态;3. How glad they were __________ each other again in BeijingA. to seeB. seeC. seeingD. Seen解析:A. Be+adj +to do, 动词不定式的特殊用法4. Please help ________ to cook some chicken, Jack. Our guests are coming soon.A yourselfB youC meD yourselves解析:代词;反身代词的考查,注意后面Jack是单数;5. We will make laws ________ our environment.A to protectB protectC protectingD protected解析:B. 三个使役动词make/let/have+动词原形;6. Don’t eat ________ food in the evening. It’s bad ________ you.A too much, withB much too, forC too much, for D0 much, with解析:C. Too much加不可数名词,表示太多;much too 修饰程度;be bad for固定搭配;7. – Would you like some coffee– Yes, please. By the way, do you have any milk I prefer coffee ________ milk.A fromB withC toD for解析;B. 此题容易误选C选项,学生只看到prefer故直接选to,这题意思为更喜欢咖啡里面加一些牛奶,应该是with;8. – May I ________ your dictionary for a while–Sorry, I’ve left in at home.A borrowB lendC keepD take解析:C;根据后面for a while可知应该是延续性动词;9. When you leave the room, make sure ________ all the lights are turned off.A ifB whenC whetherD that解析:D;宾语从句的考查;10. Jack is ________ of the twins, though he looks a little old.A youngerB the youngestC the youngerD young解析: younger是特指年轻的那一个;11. I feel my heart ________ fast.A to beatB beatC beatingD beats解析:C.考查非谓语doing,侧重动作;12.We stand in the yard and look up ______ the stars in the sky.A inB /C atD on解析: up on词组固定搭配,仰视13. She prefers ________ at home rather than ________ out for a walk,A to watch TV, to goB watch TV, goC to watch TV, goD watch TV, to go解析: to do rather than do sth;14. He wrote ________ 800-word letter to his father, talking about his life in Shanghai.A aB anC theD /解析:B.冠词的考查;15. I think Suzhou is one of the most beautiful tourist cities in China and I’ll come for ________ second time.A theB aC anD /解析:冠词特殊用法,a second/a third time指再一次,又一次16. The town government set up a new modern hospital for the farmers, ________A does itB doesn’t itC did itD didn’t it 解析:D.反义疑问句的考查,原则前肯后否前否后肯;18. - I won’t have a trip to Yellow Mountian unless my best friend Mary ________, too.- You mean you will go if Mary goesA will inviteB invitesC is invitedD will be invited解析:C. Unless引导条件状语从句,遵循主将从现的原则,此题为被动语态,故选C;19. ______ deer are drinking from the pond. Take a photograph of them quicklyA AB AnC TheD /解析:C.20. I refused to buy the second-hand book as it had ________ missing pages.A fewB noC littleD many解析:D. 本题考查名词的单复数问题,后面pages是复数,此题表示肯定概念,故选D;21. Kitty ________ every Saturday afternoon volunteering in an old people’s home.A costsB takesC paysD spends解析:D.此题考查几种花费的表达形式,主语为Kitty第三人称单数,故选D;22. With the help of the Internet, it’s ________ to send an e-mail than a regular letter.A quickB quicklyC much quickerD much more quickly解析:D.形容词的比较级,quickly和slowly这两个是双音节里面特殊的,需要借助more一起构成其比较级形式,much用来修饰比较级,所以选择D;23. His successful experience ________ an interesting topic to discuss.A raisedB roseC was raisedD was risen解析:A. Raise和rise的区别,此题需要一个及物动词引起这个意思,故选A;24. Peter asked me ________ I was busy with those days.A whereB why Cwhat D which解析:C;宾语从句,此题考查词意,be busy withwhat25. Many kids want to know ________.A what is the spaceship likeB what the spaceship looks likeC how the spaceship looks likeD how does the spaceship look like解析:B;What look like/How like26. The traditional medicine ________ to be effective in treating the old man’s headache.A turned overB turned outC turned onD turned into解析:B. 动词词组词意辨析,turn out to be结果是,证明是27. This kind of mushrooms look _______ but you should never eat them.Agently Blovely C softly D beautifully解析:B;Look系动词+形容词构成系表结构,考生要熟悉常考系动词有哪些28. –Oh, Shoot My computer doesn’t work again– ________ must be something wrong with the CPU.A)There B It C This D That解析:A;There be句型的考查29. The 16th Asian Games were held in Guangzhou ________ November 12th to 27th.A onB inC fromD for解析:A;时间介词的考查,on+具体某一天30. Albert, if you ________ carefully, you will understand the report well.A listenB listenedC will listenD are listening解析:A;If引导条件状语从句,时态遵循主将从现的原则;31. Kate and her sister went to holiday with a cousin of _________.A theirB theirsC herD hers解析:B;名词性物主代词32. ________ exciting the opening ceremony of the 16th Guangzhou Asian Games wasA What anB What aC WhatD How解析:D;感叹句的考查;what+n/how+adj.33. -- ________ has Danny been to Europe-- Twice.A How longB How soonC How oftenD How many times 解析:C.根据答句可以得出是对频率的回答34. One of my friends has already been to the Great Wall seven times. He is looking forward to visiting it________ eighth time.A theB aC anD /解析:B;不定冠词a+序数词表示再一次又一次的概念;35. This ruler isn’t very long. She wants a ________ one.A longB shortC shorterD longer解析:D;比较级36. Nowadays people usually get ________ information from TV, newspaper and the Internet.A quite a fewB a number ofC a lot ofD a pair of解析:C;考查名词的数;Information是不可数名词,只有C选择既可以跟可数又可以加不可数37. ________ wonderful news report they wrote All of us are proud of them.A What aB WhatC How aD How解析:B;感叹句中常考不可数名词:fun/information/weather/advice/news38. The reading room in our neighbourhood is ________ from 9 . on weekdays.A openB opensC openedD opening解析:A. Open两个词性,动词和形容词,be+open表示开放的状态;39. Could you ______ me your dictionary I want to find the meaning of this new word.A bringB borrowC lendD keep解析:C;动词词意的辨析;外借lend,借入borrow40. -- Would you like me to help you with the housework-- ________.A Yes, I’d like to.B You’re welcome.C No, I’d like to walk in t he garden.D That’s very kind of you.解析:D;情景交际题41. Tom is very ________ his new car, a wonderful Audi A8. his desire to have his own car has come true.A proud ofB good atC interested inD famous for解析:A;词组辨析45. Go on a diet, ________ you will not grow overweight.A orB butC andD so解析:C;祈使句:or/and46. Many Chinese workers ________ Libya soon after the civil war broke out.A had leftB leftC were leavingD have left解析:B;一般过去式47. This bakery ________ outdated bread to make new products in the past three years.A was usingB has usedC had usedD used解析:C;过去完成时态;48. The World Bank has warned that rising food prices are pushing another thirty-four ________ people below poverty line.A million ofB millions ofC millionD millions解析:C. 数词的表达,数字后要加具体的数字49. Ferries will reappear on the Huangpu River soon. Look, ________ excited children are when they hear the newsA whatB what anC howD what a解析:C;感叹句50. In my opinion, the harder you study, the better ________ you’ll get in your school work.A gradesB notesC answersD lessons 解析:A;Grade表示分数51. He took up a language course while staying in Paris last summer. The underlined part means ________.A began to carryB began to learnC began to selectD began to hold解析:B;动词词组词意辨析52. – To make sure the food we eat every day is safe, the government should do more.-- ________.A)That sounds nice. B That’s not true. C I can’t agree more. D You are welcome.解析:C;我本能同意的更多,就是非常同意53. The bowl of fish smells ________. It has probably gone bad.A strangeB wellC niceD terribly解析:A;Smell系动词+adj,根据句意应该是变坏了54. You ________ worry about your study. We will help you if necessary.A don’t needB needn’tC needn’t toD need to解析:B;Need两种用法55. Mary plans to take ________ presents to her friends in New York when she goes there at Christmas.A plenty ofB huge amounts ofC a great deal ofD an amount of解析:A;名词的数,presents是可数名词复数;B/C/D都是修饰不可数名词;56. I really don’t know ________ your question.A which to doB which to answerC what to doD how to answer解析:D;57. Mike failed in yesterday’s test. ________.A Either did John.B So did John.C Neither did John.D So John did.解析:B;So/neither两个倒装句的用法58. They formed an English study group last week. The underlined part means _______.A organizedB put upC startedD built解析:A;表示组织成立59. It’s ________ pleasure for me to be invited to play the piano at eh concert.A aB anC the D/解析:D. 抽象名词前不需要加冠词60. Linda doesn’t swim as ________ as Ken.A quickB quicklyC quickerD more quickly解析:B;As...as加形容词副词原级;61. We are told that the journalist ________ a speech on teenage problems next Monday.A makesB will makeC is makingD has made 解析:B;一般将来时态62. – Pollution in 2020 will probably be worse than today.-- ________.A I don’t agree with you. Perhaps it’s nice news.B I’m sorry, but I think I want to be a volunteer.C Maybe you’re right, and you’ve done a wonderful job.D You may be right, but I think it wont’ be a problem t hen.解析:B;64. This film ticket is no longer ______.A availableB appreciateC affordD accurate解析:C;动词词义辨析,表示负担得起65. After the severe destruction, the houses in the earthquake-stricken area needed ______ as soon as possible.A rebuildB rebuiltC rebuildingD to rebuild 解析:C;Need/want/require这三个词用主动形式表达被动概念,need doing sth66. ______ interesting work it is to put up a wall newspaperA HowB How anC WhatD What an解析:C;感叹句67. Do you know ______ the population of China ______A what, isB how much, isC what’s, /D how many is, /解析:C;问人口的表达方式68. – Mr. Brown, may I ask you some questions- ______.A What is itB Never mind.C Please go ahead.D Yes, you may.解析:C;词性转换1.Football fans like to enjoy ________ about the result of the football matches. argue2.Nobody wants to make friends with him, because he is ________ honest.3. Even some police ________ were killed during the 2-hour fight. chief4. The public got very angry when they knew ________ food was fed to children at school . health5. The cat looked ________ at the fish in the bow. hungrydon’t think Tom can swim ______ the river at this point. It’s too wide.cross7. Dad said that if I made it clear why I ______ with him, he wouldn’t be angry. agree8. ______ is a kind of good quality. honestKey:argument/dishonest/chiefs/unhealthy/hungrily/across/disagree/Honesty句型转换1. It’s fun to go skating on the real ice in winter. 感叹句________ ________ it is to go skating on the real ice in winterKeys:What fun2. Johnson started too late to catch his train to Nanjing. 句意不变Johnson started ________ late that he ________ his train to Nanjing.Key:so;miss3. The government has made some plans to improve our world. 被动Some plans ________ ________ made to improve our world by the government.Key:have been4. The farmer asked the lady, “What will you visit this weekend”The farmer asked the lady what _____ _____ visit that weekend.Key:would she5. They de cided that they wouldn’t have the picnic because of the bad weather. 简单句They decided ______ ______ have the picnic because of the bad weather.Key:not to7. There is little rain in our city in winter.保持原句意思It ______ ______ in our city in winter.Key:seldom rains9. These stamps are elder brother’s.These stamps my elder brother.Key:belong to10. The box is so heavy that I can’t carry it.The box isn’t for me to carry.Key:light enough11. The question is very difficult. No one can answer it.The question is difficult answerKey:too;for everyone to12.She was so weak that she couldn’t take care of her baby.13.She was _________ weak _________ take care of her baby.Key:too to13.The film began 20 minutes ago.14.The film has been _________ _________ 20 minutes.Key:on for14.“Will you go home tomorrow” the mother asked her son. 保持句意不变The mother asked her son ________ he ________go home the next day.Key:if would15. Mr. Smith wanted to know where he could get the information. 改成简单句Mr. Smith wanted to know ________ ________ get the information.Key:where to16.Tom had no time for breakfast. He went to school in a hurry.17.Tom _________ to school _________ breakfast.Key:went without18.The boy lent a story-book to Tom just now.19.Tom _________ a story-book _________ the boy just now.Key:borrowed from18. How is the weather today__________ the weather ___________todayKey:What’s like19. Mrs. Smith prefers milk to coffee.Mrs. Smith likes milk ___________ ___________ coffee.Key:better than20. The motorcycle is Mr. Clark’s.96The motorcycle ___________ ___________ Mr. Clark.Key:belongs to21. Our foreign teacher will go back home tomorrow. We’ll say goodbye to him at the airport.98 Our foreign teacher will go back home tomorrow. We’ll __________ him _________at the airport. Key:see off22. Nobody else in his class can speak English as fluently as he. 01He _________ English _________ fluently in his class.Key:speaks best23. The recitation was kind of boring and I liked the cross talk better. 02Key:a bit/a little24. Sam's grandfather died 10 years ago. 0225. The boy asked his mother, “does water freeze at 0’C”03The boy asked his mother __________ water __________ at 0’C.Key:if froze26. After a quick breakfast, Mary left in a hurry. 04After a quick breakfast, Mary _________.Key:left hurriedly27. Junior 3 students began to learn chemistry a year ago. 08Junior 3 students __________ learned chemistry __________ a year.Key:had for28The firemen stopped working when all the workers were saved. 保持原句意思金山The firemen ________ stop working ________ all the workers were saved.Key:didn’t until29. We are going to say goodbye to him at the airport. 保持句意基本不变杨浦We are going to ________ him ________ at the airport.Key:see off30. Betty speaks French best in our school . 保持句意基本不变浦东________else speaks French as as Betty in our school.Key:Nobody well31. It was eleven o’clock when he finished his homework last night.He finish his homework it was eleven o’clock.Key:didn’t untilquick, or you can’t catch the bus. 保持句意基本不变you quick, you can’t catch the bus.Key:If aren’tbox on the shelf is so heavy that the boy can’t carry it. 保持句意基本不变The box on the shelf isn’t _____________ _____________ for the boy to carry.Key:light enough34. I was the only person who was invited to the party. 保持原句意思Nobody ___________ me ____________ invited to the party.Key:except was35. Yesterday my friend Charlie said sorry to me because he broke my glasses. 保持句意不变Yesterday my friend Charlie ________ to me ________ breaking my glasses.Key:apologized for37. The 30th Olympic Games were held in London in 2012. 保持句意基本不变The 30th Olympic Games ________ ________ in London in 2012.Key:took place38. Remember to say sorry to others if you do something wrong. 保持句意不变Remember to ________ ________ others if you do something wrong.Key:apology to39. My daughter studies both singing and dancing in the kindergarten. 保持句意基本不变My daughter studies singing ________ ________ as dancing in the kindergarten.Key:as well40. Amy looks after the pets when her parents are away from home. 保持句意基本不变Amy the pets when her parents are away from home.Key: cares for41. We cannot predict the exact time and location of earthquake now. 保持句意基本不变________ ________, we cannot predict the exact time and location of earthquake.Key:At present42. To do this job well, you need time, and you also need brains. 保持句意基本不变To do this job well, you need time and brains _________ __________.Key:as well44. His brother bought a new bike a month ago.His brother _______ _______ a new bike for a month.Key:has kept错题2took one-third of the cake. The rest ______to my brother.A. leftB. was leftC. were leftD. had leftKey:B2.This grey laptop is as big as that red one.保持原句意思3.This grey laptop is the ______ ______ as the red one.Key:same size4.We held our school sports meeting in early March.对划线部分提问5._________ _______ you hold your school sports meetingKey:When did6.There is little snow in Shanghai in winter. 保持原句意思7.It _________ _________ in Shanghai in winter.Key:rarely rained8.I was successful in persuading 说服 him to change his mind保持句意不变9.I ________ _________ persuade him to change his mind.Key:managed to10.We lay on the floor just for a rest. 改为一般疑问句11.________you __________on the floor just for a restKey:Did lie12.In some states of America, children must stay in school until they are sixteen.句意不变13.In some states of America, children ________ __________ school until they are sixteen. Key:can’t beginalmost lost his way last night.保持原句意思Tom________ __________ find his way last night.Key:hardly everrunner failed to keep up with the others though he tried his best,保持原句意思The runner ____ ____the others though he did what he could.Key:didn’t catchbought the dress the day before yesterday 保持原句意思Mary ____ ____the dress for three daysKey:has keptsuggested solving the problem in a new way.改为复合句Mary suggested ____ they ____solve the problem in a new way.Key:that shoulddidn't have supper and went to the concert in a hurry yesterday.保持原句意思Linda ___to the concert_____supper yesterday.Key:speaks French most fluently in our class.保持原句意思____ ____ in our class can speak as fluently as Sam does.Key:Nobody elsehave got two tickets _________Jolin's concert tonight.Would you like to go there with meA. toB. withC. ofD. ForKey:Dthink I will ________ fishing as a hobby after I retire in a few years.A.take up off out awayKey:A17.Please help__________to cook some chicken, Jack.18.Our guests are coming soon.19.A. yourself B. you C. me D. YourselvesKey:A20.They had a pleasant chat ____________a cup of coffee.21.A.forKey:BBrown is an experienced teacher and he will teach_______English this term.A. yourB. yoursC. yourselvesD. YouKey:D.20.Would you like some tea or coffee21.__________.22.A Yes, I'd love to. B No, thanks. C Tea, please D All of them.Key:C.23.How did Phelps become so good He was born with the body of a _________swimKey:swimmer初三优题库汇总一、单选1. ---How are you going to meet your aunt at the airport _____ Thursday morning---I’m going there _____ my car.A. on, inB. on, byC. in, byD. in, in答案:A解析:具体某日的早、午、晚要用介词on,by car,by后无冠词或代词,in one’s car,in后有冠词或介词;2._____ big success the film wasA. What anB. What aC. How aD. How答案:B解析:success,pleasure等抽象名词前若有形容词修饰,要加冠词a/an;3. ______ the teachers in their school is about 200 and one fourth四分之一 of them are________ teachers.A. A number of; womenB. A number of; womanC. The number of; womenD. The number of; woman答案:C解析:a number of“许多……”,the number of“……的数量”,两者后都接可数名词复数,名词前有woman或man限定,变复数要两者都变;lot of enjoyment is given _______many people.答案:C解析:give,offer等接双宾的动词,若将将直宾物提前,要加介词to或for,具体接to还是for由动词决定;should do more ”t alw ays be at the desk doing your _____.,exercises ,exercises ,exercise ,exercise答案:A解析:exercise当“锻炼”讲,不可数,当“练习”讲,可数;police ________the suspect at that time.watching watching watching watching答案:D解析:police,people为集合名词,本身就是复数;like this one _______anywhere.seen seen答案:C解析:like此时为介词“像”,名词后有介词but“除了”、except“除了”、like“像”、with “和”等,谓语单复数由介词前的名词决定;8. _________ useful piece of information you have gotA. WhatB. What aC. HowD. What an答案:B解析:此题是一道易错题,陷阱有两处,一是学生容易看到information就选what没有注意到前面有piece,二是useful是以辅音字母开头却发元音的单词;9. My teacher told me not to come late _________ school again.A. withB. forC. atD. to答案:D解析:此题是一道易错题,学生容易想到be late for,但此处late为副词,come与to进行搭配;10. ________ gets the lucky number at the end of the party will be given the new iPad.A. Those whoB. No matter who C Whoever DAnyone答案:C解析:此题是一道易错题,难度较大,考的是主语从句的连接词,适合程度非常好的学生做,需要注意的一是谓语为单数,所以A选项排除,二是名词性从句中no matter who与whoever不相等;11. Our history teacher told us that the Ming Dynasty_________ for about 275 years in history.A. has existedB. had existedC. existedD.has been existed答案:C解析:此题是一道易错题,需要学生对时态有非常深刻的理解,学生容易看到“for+时间段”就选完成时,但明朝已经是一个过去发生的事实了,已经不存在了,所以此题选一般过去时;12. to customers.A. be openedB. be openingC. openD. be open答案:D解析:此题是一道易错题,open既有动词的词性,作动词讲时是瞬间性的不能与段时间连用,又有形容词的词性,做形容词讲可与be一起与段时间进行连用;13. The little boy’s decided to spend as much time as he _____ _ the elderly.A. could to helpB. can to helpC. could helpingD.can helping答案:D。
初三英语中考易错题解析初三学生面临毕业,无论在讲解语法的时候,还是在讲解词汇的时候,都离不开例句,尤其是一些较为典型的例句。
现在就学生在考试过程中经常遇到的一些较易出错的句型、结构归纳如下,希望对初三学生有所帮助。
1.There is in today's newspaper.A. new nothingB. new anythingC. nothing newD. anything new解析:该题主要考查的是形容词和不定代词的位置关系。
修饰不定代词的词通常后置(即放在被修饰词之后),因此,C项和D项位置关系是正确的,但anything主要用于否定句和疑问句,故答案为C。
2.you he is able to swim ,but I am .A. Both ,andB. Not only , but alsoC. Either , orD. Neither , nor解析:由but I am可知,前半句所表达的意思为“你和他都不会游泳”,而表示“两者都不应用"neither ...nor ...”;故答案为D。
3.Mount Qomolangma, “the roof of the world",is as as 8,848 meters.A. high B, higher C. highest解析:该题主要考查“as...as”这一结构的用法。
as...as中间应用形容词或副词的原级,意为“和......一样”,故答案为Ao类似的结构还有“too...to ”及“so...that”,中间亦应用形容词或副词的原级。
例如:The boy is too young to go to school.这个小孩年龄太小还不能上学。
4.You your father ,why not?A. would tellB. should tellC. would have toldD. should have told解析:该题考查should have done sth的用法,表示“本应该做某事,但是没有做”。
初三语法易错题汇总(适合优质学员二模提高冲刺使用)1. When he retired at 65, he ____ painting in over 20 cities in Europe and Asia.A. teachesB. has taughtC. had taughtD. would teach解析:C. 时态的考查,teach是发生在retired之前,故是过去的过去,用过去完成时态。
2. --______ did the winner of the bicycle race ride?—At the speed of 40km/h.A. How longB. How fastC. How muchD. How far解析:B.根据答句可以得出是对速度的提问,故用how fast.3. Alice ,________her friends,always takes a long walk after supper.A. bothB. as well asC. but alsoD. And解析:B.主谓一致问题。
根据takes可以得出句子的主语是第三人称单数,故是就远原则,考生应清晰的掌握就近原则和就远原则.4. Hey,boy!would you like to show me your _______hand?A. the othersB. the otherC. otherD. Another解析:C. 考查不定代词。
常考搭配:one...the other;some...others;考生要清楚one...the other(中the可以换成相应的形容词性物主代词)5. The manager is much better than other employees________dealing with the customers’ complaints.A. inB. atC. onD. Of解析:B. 词组be good at的固定搭配,此题为比较级。
6 .I hear that you have been to Wenzhen. Did you like it ?How long _______ you ________there ?A.do.....stayB. have .....stayedC. did.....stayD. had .....stayed解析:C. 动词时态的考查,此题没有侧重对现在造成的影响,故直接用一般过去时态。
7. The sea wave reached 10 meters in the storm.(对划线部分提问)_________ ___________was the sea wave in the storm?(对划线部分提问)解析:How high. 特殊疑问句的考查,学生需掌握how相关的特殊疑问句含义。
8. Martine doesn’t play for the school football team any longer.(保持句子意思不变)Martine is _________ _________ a member of the school football team .解析:not any longer=no longer.9. During the test,our teacher stopped us from talking with each other.(保持句子意思不变)Our teacher didn’t ________us __________talk with each other during the test.解析:stop sb from doing sth=don’t allow sb to do sth.10. The factory decided to increase production to meet the needs of more customers.(保持句子意思不变)The factory decided to increase production to _________ the ________ of more customers.解析:meet one’s needs=satisfy one’s demand.11. The thief finally said that he stole the valuable necklace from the lady.(保持句子意思不变)The thief finally __________ __________ the valuable necklace from the lady.(保持句子意思不变)解析:承认做过某事。
Admit doing sth12. Did Maggie fly to New York on her own? He wondered.(合并成一句话)He wondered if Maggie _________ _________to New York on her own?解析:宾语从句的考查。
Had flown13. The baby pandas weigh about 150 grams on average.(对划线部分提问)__________ _________do the baby pandas weigh on average?__________ _________is the baby pandas on average?______________ the _________ of the baby pandas on average?解析:How weigh;How heavy;What’s weight 对重量的三种提问方式14. Helen returned the magazine to the library after reading it.(保持句子意思不变)Helen __________ __________the magazine to the library after reading it.(保持句子意思不变)解析:return=give back to, 同义词组的积累15. It is necessary for us to review what we have just learned in time .(保持句子意思不变)It is necessary for us to _____ __________what we have just learned in time .解析:review=go over,复习回顾。
16. Mr.Smith selects his words very carefully when he speaks in public.(保持句子意思不变)Mr.Smith selects his words with________ ________ when he speaks in public.解析:carefully=with great care, 仔细的小心的17. As it is said by Joyce,the link method is a basic way of improving our memory.(保持句子意思不变)_________ _______Joyce,the link method is a basic way of improving our memory.解析:As it is said by sb=According to sb. 根据某人的观点。
18. You can pay the bill in cash. You can pay the bill by credit card.(保持句子意思不变)You can pay the bill_______ in cash_______by credit card.解析:either...or,21. The boys like having sports better than chatting with their friends on QQ.(保持句子意思不变)The boys ________ having sports________ chatting with their friends on QQ.解析: prefer doing sth to doing sth=like doing better than doing sth.22. Tim doesn’t like collecting coins. Jack doesn’t lik e collecting coins,either.(合并成一句话)________Tim ________Jack likes collecting coins.解析:Neither nor23. He frightened me because he made a strange sound behind me suddenly. (保持句意基本不变)He__________ me a__________ because he made a strange sound behind me suddenly .解析:frighten sb=give sb a fright. 动词词意和名词之间的转换。
24. I bought the English-Chinese dictionary two years ago. (保持句意不变)I __________ __________ the English-Chinese dictionary for two years.解析:have kept。
短暂性动词和延续性动词的转换。
错题整理1.People all think the cartoon Zoopia is interesting and wonderful. (对划线的部分提问)____ do people ____ the cartoon? (How, like)解析:容易误写成What like.2.There ____ an aple and some bananas in the black bag just now.A. is B, were C. was D. are (C)解析:there be 就近原则,此外还考察just now是过去时的重要标志。
3.- Don’t worry. Your bag ____ here until you come back. So enjoy shopping in our supermarket.- Thanks.A. will keepB. was keptC. has been keptD. will be kept (D)解析:根据语言情景可得出超市店员在向顾客说明包会被保存好,是将要发生的事情。