现在进行时易错题集锦
一、单项选择现在进行时
1．If you ______ stealing in the supermarket, you’ll be sent to the police station immediately. A．catch B．are catching
C．will be caught D．are caught
【答案】D
【解析】
试题分析：考查谓语动词的时态和语态。因为主语you和动词catch是被动关系，所以要用被动语态。在条件状语从句中常用一般现在时表将来。句意：如果在超市你偷东西的时候被抓住了，你将立刻会被送去公安局。故选D项。
考点：考查谓语动词的时态和语态
2．Some researches have proved that water quality ____ due to too many dams and pumps in some areas.
A．has been declined B．is being declined
C．is declining D．had been declining
【答案】C
【解析】
试题分析：考查动词的时态。句意：许多研究表明，水的质量由于过度开采而下降。根据语境提到研究表明，这个问题正在发生，故用现在进行时，故选C项。
考点 : 考查动词的时态
3．The water supply has been cut off temporarily because the workers the main pipe．A．repair B．repaired
C．have repaired D．are repairing
【答案】D
【解析】
试题分析：考查动词的时态。句意：因为工人正在修理主管道，所以水供应暂时被切断。根据语境表示，修理管道这件事正在进行，所以选D项。
考点 : 考查动词的时态
4． ---Why ______ so early? The movie doesn't start till seven.
---I don't want to be at the traffic there. It's terrible during the rush hour.
A．had you left B．do you leave
C．will you leave D．are you leaving
【答案】D
【解析】
试题分析：考查时态。本交际用语用现在进行时表示将要发生的动作。句意：——为什么要这么早离开？电影7点钟才开始呢。——我不想在那儿堵车。在高峰时间太可怕了。故
D正确。
考点：考查副词辨析
5．Tom, our manager, ________ for America in two days and he has asked me to find out when the earliest plane ________ next Sunday.
A．is to leave; is going to take off
B．will leave; is taking off
C．is leaving; takes off
D．leaves; will take off
【答案】C
【解析】
试题分析：考查时态。句意：我们的经理汤姆两天后将要去美国，他让我查一查下个周日最早的班机。in+一段时间，与将来时连用，根据“in two days”可知，第一空用将来时，排除D；find out后是一个宾语从句，其中包含一个when引导的时间状语从句，when从句用一般现在时代替将来时，排除A、B，故选C。
考点：考查时态
6． -- Hello, I _______ to ask if I can book two tickets for tonight’s film.
-- Sorry, we’ve already sold out.
A．am phoning B．will phone
C．phone D．have phoned
【答案】A
【解析】
试题分析：考查情景交际和时态。句意：--你好，我打电话是询问一下能否预定两张今晚的电影票。--抱歉，电影票已经售完了。根据句意可知，“我”正在打电话，表示说话时正在进行的动作，应该用现在进行时，故选A。
考点：考查情景交际和时态
7．—Darling, the headache ________ me.
— No wonder, you _________ the South Korean TV soaps since last night.
A．kills; have watched
B．is killing; have been watching
C．is going to kill; were watching
D．was killing; had watched
【答案】B
【解析】
先看第二空，根据时间状语since last night可以断定：从昨天晚上一直到现在都一直在看韩剧，因此应当用现在完成进行时态，而第一空表示现在非常头疼，故用现在进行时，因此选B。
8．I don’t really work here; I ______ until the new secretary arrives.
A．just help out B．have just helped out
C．am just helping out D．will just help out
【答案】C
【解析】
【详解】
考查时态。句意：我不是真的在这儿工作，我只是帮帮忙，新秘书来了我就走。根据语境，新秘书来之前，我是一直（或者总是）在那儿工作的，用现在进行时，故选C。
9．—Joan，what ________ in your hand?
—Look！It's a birthday gift for my grandma.
A．had you held B．are you holding
C．do you hold D．will you hold
【答案】B
【解析】
考查时态。根据答语中的Look可知，“拿”这一动作正在进行，故用现在进行时。句意：——Joan，你手里拿的是什么？——看看！这是我给奶奶的生日礼物。
10．------ What’s wrong with you, Kate?
------ The shoes don’t fit me properly. They_____ my feet.
A．have hurt B．are hurting C．had hurt D．are hurt
【答案】B
【解析】
试题分析：考查时态。本题根据句意可知用现在进行时，表示正在发生的动作。句意：——凯特，你怎么啦？——这双鞋不合脚，它们弄疼我脚了。故B正确。
考点：考查时态
11．You have no chance of getting the position. I'm afraid you ________ your time if you apply for it.
A．waste B．have wasted
C．have been wasting D．will be wasting
【答案】D
【解析】
试题分析：句意：你没有机会得到这个职位。如果你申请它的话，你会浪费你的时间的。故选D.现在进行时表动作从过去开始一直延续到现在，并有可能延续下去。将来进行时表示将来某一时刻或某一段时间正在进行的动作。例如：At 7：00 this evening I will be watching the news programmes on TV。今晚七点，我将正在收看电视上的新闻节目。What will you be doing at five tomorrow afternoon？明天下午五点你们将要干什么？
还可以在口语中常用来表示按计划或安排即将要发生的动作。例如：When shall I be expecting you this evening ？今晚我几点等你？
考点：动词时态
点评：动词时态是高考必考的三大语法点之一，所以平时对动词时态要多进行练习，分清各个时态之间的差别并掌握其用法。
12．–Oh, you said you’d tell me the latest news about the missing Malaysian Airlines flight MH370.
-- Sorry, I with my work at hand. I to that.
A．deal; will come B．was dealing; come
C．have dealt; have come D．have been dealing; am coming
【答案】D
【解析】
试题分析：句意：--你说你要告诉我关于马航MH370的最新的消息。--对不起，我手头一直有事情要处理。我马上就来讲这件事。第一空用现在完成进行时，表示从过去到现在一直在处理工作，第二空填现在进行时表示将来时，所以选D。
考点：考查时态
13．—Something smells really good in here!
—You ______ my Easter cookies．Have one!
A．smell
B．are smelling
C．were smelling
D．smelt
【答案】B
【解析】
句意：----这里有东西闻起来很香啊！---你现在闻到的是我的复活节饼干。尝一个。根据语境对方现在正闻到的香味，应用现在进行时。故选B。
14．—My dear, you ______ things about. Look, what a mess in the room!
—Sorry, Mom.
A．have always thrown B．always throw
C．are always throwing D．always threw
【答案】C
【解析】
试题分析：考查时态。本题考查进行时的一个特殊用法，进行时与always连用，表示一种感情色彩，有批评的，也有表扬的。根据句意说明本句表示的是批评的语气。句意：——亲爱的，你总是到处乱扔东西，看你的房间真乱啊！——对不起，妈妈。故C正确。
考点：考查时态
15．Ladies and gentlemen, please fasten your seat belts. The plane _____________. A．takes off B．is taking off
C．has taken off D．took off
【答案】B
【解析】
试题分析:句意：女士们先生们，请系好安全带。飞机马上要起飞了。Be doing 可以表示最近的将来，常用的动词有come ，go， leave，take off 等，根据句意可知用将来时态，选B。
考点：考查动词时态
16．—Have you started writing your report?
—Not yet. I _______ a hard time getting the information.
A．am having B．had
C．was having D．will have
【答案】A
【解析】
【详解】
考查时态。句意：---你开始写你的报告了吗？ ---还没呢。我正在艰难地找资料呢。分析句子，可由后者的回答中知道，后者还没开始写报告，正在艰难地找资料。所以本句要用现在进行时。故选A。
17．Tom, our manager, ________ for American in two days and he has asked me to find out when the earliest plane ________ next Sunday.
A．is leaving; takes off
B．will leave; is taking off
C．is to leave; is going to take off
D．leaves; will take off
【答案】A
【解析】
试题分析：考查动词时态和语态。句意：汤姆，我们经理两天后要去美国，他叫我查明下周日最早的飞机什么时候起飞。第一空用现在进行时表示一般将来时，第二空是按时刻表即将做…,用一般现在时表示一般将来时。选A。
考点：考查动词时态和语态
【名师点睛】
动词时态语态是高考考查的重点，也是整个英语语言体系中的主干知识。由于汉语里动词没有时态的变化，因此，学习和掌握英语，就要建立时态“感觉”。不管汉语里说不说“过去，现在和将来”，使用英语时，动词的时间背景是什么，我们要不断体味。同样是表示一般将来时，用现在进行时表示即将做…，一般现在时表示按时刻表即将做…。要注意区别。
18．Chinese people’s spending on overseas trips ______ year by year.
A．had risen B．rise
C．is rising D．rose
【答案】C
【解析】
试题分析：考查主语一致和时态。本句的主语是“Chinese people’s spending on overseas trips”中国人花在出国旅游上的费用，这是一个表示金钱的名词，做主语时谓语动词用单数，且本句表示的是最近这阶段一直以来的情况，所以使用现在进行时。故C正确。
考点：考查主谓一致和时态
19．— Hello, can I speak to Mr. Black?
— Sorry, madam. He ___________a lecture in the hall.
A．will give B．gives
C．is giving D．has given
【答案】C
【解析】
试题分析：考查动词时态。上句：请Mr. Black先生接电话？下句：对不起，他正在大厅里演讲。强调动作正在进行，故选C。
考点：考查动词时态
20．Why are you here? You are supposed to ______ the experiment in the lab.
A．perform B．be performing
C．have performed D．be performed
【答案】B
【解析】
试题分析：考查被动语态。句意：你为什么在这里？你应该在实验室里做实验。（是别人让他在实验室做实验）故选B项。
考点：考查被动语态
【名师点睛】
被动语态由“助动词be＋及物动词的过去分词”构成。人称、数和时态的变化是通过be的变化表现出来的。把主动语态的宾语变为被动语态的主语。把谓语变成被动结构(be＋过去分词)，根据被动语态句子里的主语的人称和数，以及原来主动语态句子中动词的时态来决定be的形式。把主动语态中的主语放在介词by之后作宾语，将主格改为宾格。
21．It’s nearly four years since I worked in that firm. I ________ a band with other fellows. A．operated B．had been operating
C．was operating D．am operating
【答案】D
【解析】
试题分析：考查时态。句意：我在那家农场上班快四年了，我现在正和其他伙伴经营一个乐队。根据句意可知，用现在进行时态，故选D。
考点：考查时态
22．It’s nearly 5 years since I worked in the company. I _______ in a school.
A．taught B．was teaching
C．am teaching D．had been teaching
【答案】C
【解析】
考查时态，句意：自从我不在公司上班已经有五年了，我现在在一所学校教学。我现阶段的动作是在教学，故选C。
23．Finding a partner and settling down has long been convention in many countries.New data，however，suggest that the trend .
A．change B．be changing
C．be changed D．is changing
【答案】D
【解析】句意为：在许多国家，“成家立业”是约定俗成的传统。然而，一组全新数据表明该趋势正在发生改变。此处suggest为“表明”之意，故后面的宾语从句应用陈述性语气。
24．—Do you know when your mother ________ to pick you up?
—At 11：40 am.
A．had come B．is coming
C．has come D．would come
【答案】B
【解析】
考查时态。句意：——你知道你妈妈什么时候来接你吗？——在上午11:40。come的动作发生在将来，故用将来时。英语中come,go,start等动词可以用现在进行时表将来，故选B。不能选D项，D项是过去将来时，不符合语境。
25．— Hello, I ________ to ask if I can book a flight ticket to Hainan tomorrow?
—Sorry, we’ve already sold out.
A．phone B．will phone
C．am phoning D．have phoned
【答案】C
【解析】考查时态。上句：我打电话是想问明天我能订一张去海南的机票吗？下句：对不起，我们已经卖完了。根据句意可知句子用现在进行时态，故答案为C。
26．— Can we play basketball in the school gym?
— No, it ______ during the summer holidays.
A．is repaired B．is being repaired
C．was repaired D．has been repaired
【答案】B
【解析】
【详解】
考查时态语态。句意：--我们可以在学校操场上打篮球吗？--不行，暑假期间操场正在被修葺。根据句意可知，这里是表示正在进行，所以要用现在进行时。主语it和动词之间是被动关系，所以要用被动语态。故选B。
27．---I will have two final exams tomorrow.
---Me too. So you _______ any sympathy from me here.
A．aren’t getting B．didn’t get
C．aren’t going to get D．haven’t got
【答案】A
【解析】
【详解】
考查时态。句意：——明天我有两科期末考试。——我也是，所以在我这里你得不到同情。语境表明第二个人明天也有两科期末考试，所以此刻不能给与同情，应该用现在进行时表示正在进行中的事情，故A项正确。
28．The world’s attention ________ China’s Belt and Road Initiative，as it has great influence on the world’s economy.
A．is to fix on B．was fixed on
C．has fixed on D．is being fixed on
【答案】D
【解析】
【详解】
考查时态。句意：全世界的注意力都集中在中国的“一带一路”计划上，因为它对世界经济有很大的影响。表示现阶段正在进行或从事的动作，用现在进行时，故选D。
29．When you are absorbed in a book or simply trying to rest, it seems that the phone ______ continuously, destroying your momentary peace.
A．rings B．has been ringing C．rang D．is ringing
【答案】D
【解析】
【详解】
考查现在进行时。句意：当你专心读书或只想休息时，电话似乎一直在响，破坏了你短暂的平静。表示现在正在进行的动作，用现在进行时。故选D项。
30．Jane is crazy about painting these days. She in her studio all day long.
A．was staying B．stayed C．is staying D．will stay
【答案】C
【解析】
考查动词的时态。句意：这些天她沉迷于画画，成天呆在画室里。根据Jane is crazy about painting these days和all day long.可知选C项。
二年级下英语易错题汇总 一、圈出与例词不同类的词 1. plane ferry car play bicycle 2. big bag short tall old 3. tiger monkey panda fish lion 二、在横线上正确填写单词 He It hear listen to am is are me your you I 1. Listen! Can you _____ the dog? It goes “woof, woof”. 2. Don’t read the book. Listen to _____. 3. _____ you a driver? No, I _____ a postman. 4. How many apples _____ there in the box? There _____ an apple. 5. This is Sam’s dog. _____ can jump very high. 6. Look at that boy. _____ is Peter’s brother. 7. Is this _____ book? Yes, it is my book. 8. My sister and _____ go to school on foot. 9. _____ I fat? No, you _____ thin. 10. This present is for _____. Take _____ present. 三、将正确的答案填写在括号里 1. ______ does Sam’s father look like? He is very tall and thin. A. What B. How old C. How 2. What _____ you see? I see a big pig in the farm. A. can B. do C. are 3. There is _____ in the zoo. A. a bear B. bear C. bears 4. My books _____ all on the shelf. A. am B. is C. are
初中英语易错题汇总大全单项选择题 12. I do well in playing football, _______. (我妹妹也行。)A. so my sister does(×)B. so does my sister(√) Li Lei is really a football fan. --- _______. (确实这样.) A. So is he(×) B. So he is(√) [析] “so+be动词/助动词+主语”的倒装结构表示前面所述情况也适用于后者，意为“……也是这样”;“so+主语+be动词/助动词”的陈述结构表示对前述情况的肯定，意为“……确实如此”。 19. 例--- He didn’t go to school yesterday, did he?-- _______, though he didn’t feel very well. A. No, he didn’t (×) B. Yes, he did (√) 例--- Don’t you usually come to school by bike?-- _______. But I sometimes walk. A. No, I don’t (×) B. Yes, I do (√) [析] 习惯上英语中的yes意为“是的”，no意为“不”，但在“前否后肯”的反意疑问句或否定疑 问句中，yes意为“不”，no意为“是的”。 20.---- Excuse me, is the supermarket far from here?---- No，it's about _______. A. 7 minutes walk B. 7 minute walk C. 7 minutes' walk D. 7 minute's walk 答案为C。本题考查名词所有格用法。当名词的复数以-s结尾时，则只需要加“'”即可，则“7分钟的距离”为“7 minutes' walk”。 21. You can not imagine how much I ______ on this dress. Is it beautiful? A. paid B. took C. cost D. spent [剖析] 答案为D。本题考察四个表“花费”的动词辨析。主语为人，且和介词on搭配的动词是spend。 22. ---- Do you know _____ university student who is talking with Joe?---- Yes， she，s my cousin, Kate. A. a B. an C. the D. / [剖析] 答案为C。university虽然以元音字母u开头，但其前若使用不定冠词时，则要用 a.不过此题中不能使用不定冠词，而是特指和Joe说话的那个大学生，故要选the。
人教版英语非谓语动词易错题集锦-名师教育含答案解析百度文库 一、非谓语动词 1．I really don't know this question. It is too hard. A. which to answer B. how to answer C. what to answer 【答案】 B 【解析】【分析】句意:我真的不知道如何回答这个问题。它太难了。which to answer回答 哪一个; how to answer怎么回答；what to answer回答什么;据It's too hard.可知此处指的是 这个问题太难，不知道如何回答，选B 2．—I think the environment is terrible these years. —Yes, it will be even worse the government takes action it. A. until; protect B. unless; to protect C. if; protecting 【答案】 B 【解析】【分析】句意：——我认为这几年来环境太糟糕了。——是的，环境会变得更糟 糕，除非政府采取措施保护环境。A. until; 直到…为止，B. unless除非，如果不，连词;C. if 如果，连词；until和if放在这里，句意不通顺，take action to do sth. 采取行动去做某事， 动词不定式作目的状语，故选B。 【点评】此题考查连词短语和固定搭配。 3．Would you mind ____________down the music? It's too noisy. A. to turn B. turning C. turn 【答案】 B 【解析】【分析】句意：你介意把音乐的音量调小一些吗？太吵了。A. to turn 不定式 B. turning 动名词（或现在分词） C. turn.动词原形。 mind.意为"介意；在乎"后面只能跟动名 词作宾语，故答案选B。 【点评】考查动名词的用法，掌握固定搭配。 4．Nowadays,most people prefer to________ computer games rather than ___________ books. A. play；reading B. play；read C. playing; reading 【答案】 B 【解析】【分析】句意：现在，大部分人比起读书更喜欢玩电脑游戏。prefer to do A rather than do B比起B更喜欢做A。故答案为B。 【点评】考查动词prefer的用法，掌握固定搭配。 5．—Julia, your mobile phone is ringing. —Wait a minute. It's dangerous ______ it while crossing the street. A. answering B. answer C. to answer
一、选择题 1．下列计算正确的是（ ） A = B ．2= C ．(2 6 = D == 2．,a ==b a 、b 可以表示为 （ ） A ． 10 a b + B ． 10 -b a C ． 10 ab D ． b a 3．) 5=（ ） A ．5+ B ．5+ C ．5+ D ．4．下列各式中，正确的是（ ） A 2=± B = C 3=- D 2= 5．下列各式计算正确的是（ ） A ．6 23 212 6()b a b a b a ---?= B ．（3xy ）2÷（xy ）=3xy C = D ．2x ?3x 5=6x 6 6．化简 ） A B C D 7．已知a 满足2018a -a ，则a －2 0182＝( ) A ．0 B ．1 C ．2 018 D ．2 019 8．如果a ，那么a 的取值范围是（ ） A ．a 0= B ．a 1= C ．a 1≤ D ．a=0a=1或 9．下列各式成立的是（ ） A 2 B 5=- C x D 6=- 10．2的结果是（ ） A ．±3 B ．﹣3 C ．3 D ．9 二、填空题 11．若m m 3﹣m 2﹣2017m +2015＝_____．
12．计算（π-3）02-2 11(223)-4 --22 --（） 的结果为_____． 13．设四边形ABCD 是边长为1的正方形，以对角线AC 为边作第二个正方形ACEF ，再以对角线AE 为边作第二个正方形AEGH ，如此下去……． ⑴记正方形ABCD 的边长为11a =，按上述方法所作的正方形的边长依次为 234,,,,n a a a a ，请求出234,,a a a 的值； ⑵根据以上规律写出n a 的表达式． 14．已知()230m m --≤，若整数a 满足52m a +=，则a =__________． 15．为了简洁、明确的表示一个正数的算术平方根，许多数学家进行了探索，期间经历了400余年，直至1637年法国数学家笛卡儿在他的《几何学》中开始使用“ ”表示算数平 方根．我国使用根号是由李善兰（1811-1882年）译西方数学书时引用的，她在《代数备旨》中把图1所示题目翻译为： 22164?a x a x +=则图2所示题目（字母代表正数）翻译为_____________，计算结果为_______________. 16．化简二次根式2a 1 a +- _____. 17．已知：5+2 2可用含x 2=_____． 18．已知实数m 、n 、p 满足等式 33352m n m n m n p m n p -+--+----，则p =__________． 19．4102541025-+++=_______．
中学英语易错集锦大全211道题(精华珍藏版) 1.Because he was ill yesterday, so he didn’t go to work. (×) Because he was ill yesterday, he didn’t go to work. (√) He was ill yesterday, so he didn’t go to work. (√) [析] 用though, but表示“虽然……，但是……”或用because, so 表示“因为……，所以……”时，though和but 及because和so 都只能择一而用，不能两者同时使用。 2.The Smiths have moved Beijing. (×) The Smiths have moved to Beijing. (√) [析] 不及物动词后接名词或代词作宾语时，要在动词之后加上适当的介词；但不及物动词 后接home, here, there等副词作宾语时，动词之后不必加任何介词。 3.The box is too heavy for him to carry it. (×) The box is too heavy for him to carry. (√) [析] the box既是这句话的主语, 也是不定式to carry的逻辑宾语，若句末再加上it，就和the box重复了。 4.Each of the boys have a pen. (×) Each of the boys has a pen. (√) [析] 复数名词前有表个体的each of, one of, every，either of等词组修饰，或有表否定的neither of, none of 等词组修饰时，谓语动词要用单数形式。 5.例:那是你心软！我不就是一个例子吗？ Neither he nor you is good at English. (×) Neither he nor you are good at English. (√) [析] either... or..., neither... nor..., not only..., but also... 等词组连接句子的两个主语时，
中考单选易错题整理 主谓一致 3. The nations of Western Europe ____ worth learning from. A. is B. are C. has D. have 7. Each of the students ____ a dictionary. A. have B. has C. is D. are 9. The Greens ____ France since the spring of 1990. A. have been to B. have been in C. has been to D. had been in 10. – How many teachers are there in your school? -- About 150. One third of them ____ men teachers. A. have B. has C. are D. is 14. Your trousers ____ dirty, you must have ____ washed. A. is, them B. are, it C. are, them D. is, it 15. Not only the student but also Mr. Smiths ____ tired of having one examination. A. is B. are C. was D. were 19. Each boy and each girl ____ hard. A. are working B. has worked C. is working D. have worked 36. Xiao Dong is one of the best students in his class who ____ by their teacher. A. praises B. is praised C. praise D. are praised 38. On every piece of the paper ____ pictures of some horses. A. is B. are C. has D. have 42. In our city ____ of the people ____ to Han Nationality. A. three fifths, belong B. three fifth; belong C. three fifths; belongs D. three fifth; belongs 51. ____ she or you going to Beijing next month? A. Was B. Is C. Were D. Are 10. That place is not interesting at all, ____of us wants to go there. A. Neither B. Both C. All D. Some 16. In the city the old _______. A. take good care of B. are taken good care of C. is taken good care of D. are been taken good care of 19. The children in this class each _____new school bag. A. have B. has C. has got D. are having 24. You as well as he _____ to blame(责备) for the accident（交通事故）. A. are B. is C. have D. has 3. Both the secretary and the manager _____agreed to attend the meeting. A. has B. have C. are D. was 7. This is one of the best novels that ____appeared this year. A.have been B. has C. had been D. have 13. When and where to build the new factory ____yet. A. is not decided B. are not decided C. has not decided D. have not decided 14. Although the first part of the book is easy，the rest ______.
人教版初中数学二次根式易错题汇编及答案 一、选择题 1．下列各式中，运算正确的是（ ） A ．632a a a ÷= B ．325()a a = C ．= D = 【答案】D 【解析】 【分析】 利用同底数幂的除法、幂的乘方、二次根式的加法和二次根式的除法法则计算． 【详解】 解：A 、a 6÷a 3=a 3，故不对； B 、（a 3）2=a 6，故不对； C 、和不是同类二次根式，因而不能合并； D 、符合二次根式的除法法则，正确． 故选D ． 2．在实数范围内有意义，则a 的取值范围是（ ） A ．a≤﹣2 B ．a≥﹣2 C ．a ＜﹣2 D ．a ＞﹣2 【答案】B 【解析】 【分析】 在实数范围内有意义，则其被开方数大于等于0；易得a ＋2≥0，解不等式a ＋2≥0，即得答案. 【详解】 在实数范围内有意义， ∴a ＋2≥0，解得a ≥－2． 故选B. 【点睛】 本题是一道关于二次根式定义的题目，应熟练掌握二次根式有意义的条件； 3．已知实数a 满足2006a a -=，那么22006a -的值是（ ） A ．2005 B ．2006 C ．2007 D ．2008 【答案】C 【解析】 【分析】 先根据二次根式有意义的条件求出a 的取值范围，然后去绝对值符号化简，再两边平方求
出22006a -的值． 【详解】 ∵a-2007≥0， ∴a ≥2007， ∴2006a a -=可化为a 2006a -+=， 2006=， ∴a-2007=20062， ∴22006a -=2007． 故选C ． 【点睛】 本题考查了绝对值的意义、二次根式有意义的条件，求出a 的取值范围是解答本题的关键． 4．下列计算中，正确的是( ) A ．= B 1 b =(a ＞0，b ＞0) C = D ． =【答案】B 【解析】 【分析】 a≥0，b≥0 a≥0，b ＞0）进行计算即可． 【详解】 A 、 B 1b （a ＞0，b ＞0），故原题计算正确； C ，故原题计算错误； D 3 2
中考英语易错题集锦 一、名词、冠词 1.– What can I do for you? -- I’d like two _______. A. box of apple B. boxes of apples C. box of apples D. boxes of apple 答案: B. (选择其它三项的同学要注意仔细看题.不要马虎, 这里box 和apple都是可数名词) 2.Help yourself to _________. A. some chickens B. a chicken C. some chicken D. any chicken 答案: C (选择A的同学要注意chicken当鸡肉讲时不可数) 3..________ it is today! A. What fine weather B. What a fine weather C. How a fine weather D. How fine a weather 答案: A. (选择B的同学要注意weather不可数. 选择C和D的同学要注意weather是名词, 要用what来感叹.) 4.Which is the way to the __________? A. shoe factory B. shoes factory C. shoe’s factory D. shoes’ factory 答案: A. (选择D的同学注意这里不是指名词所有格, 而是名词作形容词的用法.类似的用法如: pencil box; school bag等.) 5.This class ________ now. Miss Gao teaches them. A. are studying B. is studying C. be studying D. studying 答案: A. (选择B的同学要注意, 当这种概念名词当“人”讲的时候要做复数处理.类似的还有: the police are running after the thief等) 6.We will have a _________ holiday after the exam. A. two month B. two-month C. two mo nth’s D. two-months
高三英语单选易错题集锦十套共400单选题最新高三英语单选易错题集锦[1] 单项选择题 1 I cant remember _____________ made the teacher give Mary the permission to leave the class earlier A that it was what B what it was that C what was it that D that was it what 2 He let out an ______________ cry weve won A excited B exciting C excite D excites 3 –Is football Johns favourite sport --Yes __________ football baseball is his greatest love A Near to B Except C Beside D Next to 4 Do you think regular exercise ___________ good health A benefit from B reach for C make for D go for 5 Have you applied ___________ Mr Black _____________ the post Its worth a try A for to B with for C with about D to for 6 _______ the loud noise going on in the workshop I can hardly __________ on my lessons A As put B As concentrate C With rely D With concentrate 7 _________ Ive never seen anyone whos as capable as Kate
二次根式易错题难题 1、当 时， 有意义 2、计算： 3、计算： 4、计算： (a >0,b >0,c >0) 5、计算： = = 6、 7、 则 2006个3 2006个4 8、 9、观察以下各式： 利用以上规律计算： 10、已知 一、选择题 11、若32+x 有意义，则 ( ) A 、 B 、 C 、 D 、 12、化简 的结果是 ( ) A 、0 B 、2a -4 C 、4 D 、4-2a 13、能使等式 成立的条件是 ( ) A 、x ≥0 B 、x ≥3 C 、x >3 D 、x >3或x <0 14、下列各式中,是最简二次根式的是 ( ) A 、 x 8 B 、b a 25 C 、2294b a + D 、 15、已知 ,那么 的值是 ( ) A 、1 B 、-1 C 、±1 D 、4 16、如果 ，则 a 和 b 的关系是 ( ) A 、a ≤b B 、a b 17、已知xy >0，化简二次根式 的正确结果为 ( ) A 、 B 、 C 、 D 、 18、如图，Rt △AMC 中，∠C=90°， ∠AMC=30°，AM ∥BN ，MN=2 cm ， BC=1cm ，则AC 的长度为 ( ) A 、2 3cm B 、3cm C 、 D 、 19、下列说法正确的个数是 ( ) ①2的平方根是 ；② 是同类二次根式； ③ 互为倒数；④ A 、1 B 、2 C 、3 D 、4 20、下列四个算式，其中一定成立的是 ( ) ① ； ② ； ③ ④ A 、①②③④ B 、①②③ C 、①③ D 、① 三、解答题 21、求 有意义的条件(5分) 22、已知 = a -1() = 2232）（= c b a 2 382）（= += += +222222444333443343，，= +22444333 = +-2006 2005 ) 12() 12(() = +??? ??++++++++120062005200613412311 21 2 3 - ≥x 23-≤x 32 - ≥x 32-≤x 2 )2(2-+-a a 3 3 -= -x x x x 2 y 5 1 =+x x x x 1-121 22-=+-?-b ab a b a 2 x y x - y y -y -y --3 M A N B C cm 323a a 2.05与21 212+-与3223--的绝对值是1 122 2+=+a a ）（a a =2 ） （0>?=ab b a ab 11)1)(1(-?+=-+x x x x 1 1 +-x x 2 1 4422-+-+-= x x x y
初三易混淆 易错题集锦 10月26日晚8点到8点30讲解（郁老师） 1speak English讲英语 2say…in English用英语说 3say that说… 4talk about谈论.. 5tell the difference区分差异 6what….say说什么 7talk with….与…交谈 8 tell a story 讲故事 1 Mr Lee ______ that he would join us in the football game tomorrow (said talked spoke told) 2 Millions of Shanghai citizens are learning to _____ English for the 2019 World Expo
(tell speak say talk) 3 The teachers and students are____ about the school sports meet these days (speaking talking saying telling) 4 Could you _____ something in English in today’s English class? (say speak tell talk) 5 Tim could _____ neither French nor German, so I ____ with him in English (speak…talked talk…..told say….spoke tell….talked) 6 I’m sorry I didn’t hear what you _______. Could you repeat? (talked told said spoke) 7 Students often find it hard to ________ the difference between the two words (say tell talk speak)
大家知道，现在的中考英语试题总体不难，只要不放弃英语学习的学生都可以考及格以上，但欲考接近满分却并非易事。因为为了适当拉开学生距离，命题老师往往也会出一两个所谓的压轴题，以把那些真正的英语尖子生选拔出来。有时候我们学生与重点高中失之交臂，就是失分在下面我精选的难题上。 ( ) 1. ________ it is today! A. What fine weather B. What a fine weather C. How a fine weather D. How fine a weather 解析：选A. 此题容易误选B. weather是不可数名词，前面不能有不定冠词。英语中经常考查的不可数名词有work, news, adivice, information等。 ( ) 2. Which is the way to the __________? A. shoe factory B. shoes factory C. shoe’s factory D. shoes’ factory 解析：选A. 此题极易误选B, C, D. 英语中名词单数可以修饰名词，如：an apple tree →two apple trees. 但注意a man teacher→two men teachers。 ( ) 3. This class ________ now. Miss Gao teaches them。 A. are studying B. is studying C. be studying D. studying 解析：选A. 此题容易误选B. class, family, team等单词如果表示整体谓语就用单数，表示个体就用复数，从语境及其后面的代词them可以看出，class表示个体，故选择A。( ) 4. We will have a _________ holiday after the exam。 A. two month B. two-month C. two month’s D. two-months 解析：选择B 此题容易误选C, D. 在英语中数词中间用连字符号加名词单数，构成符合名词，在句中只能作定语，如果选择C, 需要把逗号放s后面。 ( ) 5. There is no enough ________ on the corner to put the table。 A. place B. room C. floor D. ground 解析：选B. 此题最容易误选A.。room在句中是空间而非房间。句意：角落里没有摆桌子的空间了。 ( ) 6. We can have _____ blue sky if we create _____ less polluted world。(苏州2010) A. a; a B. a; the C. the; a D. the; the 解析：选A. 此题容易误选C, D. 根据句意：如果我们创造一个没有污染的世界，那么我们就用一个蓝色的天空。 ( ) 7. —Are you ______ American or English? —English.. We are working in Wuhu. (芜湖10) A. a B. \ C. the D. an 解析：选B 此题容易误选D. 句中American是形容词而非名词，如果句中改为Are you __________ or an English man? 就选择D。 ( ) 8. You like playing basketball, and he likes running, _______? A. don’t you B. doesn’t he C. do you D. does he 解析：选择B. 此题容易误选A. 其实不是对前面的句中进行反问，而是对he likes running 进行反问。 ( ) 9. —Why not take ____umbrella with the sign “Made in China”？It is _____ useful umbrella? —What _______ good advice it is! A. an; an; a B. an; a; \ C. a; an; a D. \; an; a 解析：选B. 大多数学生容易做错此题。记住an用在元音音素前而不是元音字母前，记住了这一点就知道了an umbrella 和a useful umbrella. 在最后一句中advice是不可数名词，前面不能接不定冠词。故选择B ( ) 10. — When shall we meet again next week?
高中英语易错题专题汇总42题 1. I wanted some tea, but there was _____ left. A. no one B. a little C. none D. nothing 2.---I’ve been told that the work is unfinished. ---It’s true. They ____ have been finished it half-way. A. mustn’t B. can’t C. shouldn’t D. wouldn’t 3.They must have gone out climbing last Sunday,____ they? A. can’t B. haven’t C. hadn’t D. didn’t 4.He was ____ boy with ____ little money in his pocket ____ no one paid any attention to him. A. so little a; so; that B. such a little; so; as C. a very little; /; that D. such little; so; that 5. -----____ is the way from your home town? -----It's about 20 km from here. A. How far B. How long C. How many D. How much 6. My pen ____ better than yours. I may lend it to you. A. is written B. wrote C. writes D. is writing 7. -----May your pen be in your pencil-box? -----Ah, ____. A. so it may B .so it is C. so is it D. so may it
二次根式易错题难题 1、当a 时， 有意义 2、计算： 3、计算： 4、计算： (a >0,b >0,c >0) 5、计算： = = 6、 7、 则 2006个3 2006个4 8、 9、观察以下各式： 利用以上规律计算： 10、已知 一、选择题 11、若32+x 有意义，则 ( ) A 、 B 、 C 、 D 、 12、化简 的结果是 ( ) A 、0 B 、2a -4 C 、4 D 、4-2a 13、能使等式 成立的条件是 ( ) A 、x ≥0 B 、x ≥3 C 、x >3 D 、x >3或x <0 14、下列各式中,是最简二次根式的是 ( ) A 、x 8 B 、b a 25 C 、2294b a + D 、 15、已知 ,那么 的值是 ( ) A 、1 B 、 -1 C 、±1 D 、4 16、如果 ，则a 和b 的关系是 ( ) A 、a ≤b B 、a b 17、已知xy >0，化简二次根式 的正确结果为 ( ) A 、 B 、 C 、 D 、 18、如图，Rt △AMC 中，∠C=90°， ∠AMC=30°，AM ∥BN ，MN=2 cm ， BC=1cm ，则AC 的长度为 ( ) A 、23cm B 、3cm C 、3.2cm D 、 19、下列说法正确的个数是 ( ) ①2的平方根是 ；② 是同类二次根式； ③ 互为倒数；④ A 、1 B 、2 C 、3 D 、4 20、下列四个算式，其中一定成立的是 ( ) ① ； ② ； ③ ④ A 、①②③④ B 、①②③ C 、①③ D 、① 三、解答题 21、求 有意义的条件(5分) 22、已知 求3x +4y 的值 23、化简625①- ②627- 24、在实数范围内将下列各式因式分解 ① ② ③ ④ 25、已知实数a 满足 ，求a -20052的值 26设长方形的长与宽分别为a 、b ，面积为S ①已知 ；②已知S= cm 2,b = cm,求 a 27、①已知 ； ②已知x = 求x 2-4x -6的值 28、已知Rt △ABC 中，∠ACB=90°，AC=22cm ， BC=10cm ，求AB 上的高CD 长度 29、计算： 30、已知 ，求① ；② 的值 ()=-231）（a -1()= 2232）（=c b a 2382）（= +=+=+222222444333443343，，= +22444333 = +-20062005)12()12(()= +??? ??++++++++12006200520061341 231 121 23 -≥x 23 -≤x 32-≥x 3 2-≤x 2)2(2-+-a a 33-=-x x x x 2 y 51 =+x x x x 1-12122-=+-?-b ab a b a 2x y x -y y -y -y --3M A N B cm 323 a a 2.05与21212+-与3223--的绝对值是11222+=+a a ）（a a =2）（0>?=a b b a ab 11)1)(1(-?+=-+x x x x 11+-x x 214422-+-+-=x x x y 3322+-x x 752-x 44-x 44+x a a a =-+-200620057250S cm b cm a ，求，1022==C A B D ()()()()121123131302-+-+---+
2021年中考英语选择易错题集锦 1. It is _______ outside. Let’s put on our raincoats and go out, Tom. A. cold B. hot C. sunny D. rainy 【解析】此题易误为A。因为这里有个put on短语，如果不注意raincoats这个词那就很可能草率地选择A。raincoats是“雨衣”的意思，而不是一般的衣服，那么不是因为外面“冷”，而是因为“下雨”才穿“雨衣”。正确答案为D。 2. —_______ do you _______ about spring? —The flowers and the green trees. A. How, like B. How, think C. What, think D. What, like 【解析】此题陷阱选项为A或B或C。这是由于忽略语境造成的。由答语The flowers and the green trees. 可知，所问的是“你喜欢春天的什么?”而不是“你觉得春天怎么样?”。正确答案为D。 3. —What’s your sister like? —_______. A. She is a worker B. She likes pears C. She is very thin D. She is like her father 【解析】此题陷阱选项为B或D。有很多考生一看题干中的like一词就会想当然地选择B或D。其实，问句的意思是“你姐姐长得怎么样?”因此，正确答案为C。What’s …like? 这个句型常常用来询问某人的长相或某事的情况(包括天气情况)。
初中英语易错单选题 1 What do you think ______solve the problem ? A.you can do B.can you do C.you can do to D.can you do to 2 In the past he often made his sister___, but now he is often made __by his sister. A.to cry; to cry B.cry; cry C.to cry; cry D.cry; to cry 3 The teacher told us that the sun ____in the east. A.rises B. rose C. raises D.raised 4 He lives in a village _____there are a lot of trees. A. there B. where C.that D.which 5 He ________ Alice for ten years. A. married to B.has married to C.has married D.has been married to 6 We need fifteen more people _____our team to do the job. A.but B.except C.as well D.besides 7 They won`t allow us ________ at this beach. A.swimming B.to swim C.swam D.swim 8 Is this factory ______you visited last week? A.that B.where C.the one D.in which 9 The reason ___he was absent from the meeting was ___his car broke down on the way. A.that; because B.why; that C.that; that D.for; that 10 Is the river_____ through that town very large? A.which flows B.flows C.that flowing D.whose flows 11 The teacher told me that the students I wanted to see were seen___ football on the playground just now. A.playing B.to be playing C.play D.to play 12 The red rose is the only one _____I really like. A.which B.who C.that D.whom 13 All the apples _____ fell down were eaten by the pigs. A.those B.which C.what D.that 14 Don`t forget the day ______you were received into the Youth League. A.when B.that C.at which D.where 15 I prefer______ at home to _____outside. A.staying, playing B.to stay, play C.staying, play D.to stay, playing 16 The box is _____what I saw in the shop. A.same as B.the same like C.the same that D.the same as 17 The pen ______she writes letters is broken. A.which B.that C.with which D.by which 18 Would you like to ______us in our discussion. A.take part in B.join C.taking part in