人教版小学三年级英语寒假专题——Be动词用法和祈使句

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年 级三年级 学 科 英语 版 本 人教新课标版 课程标题寒假专题——be 动词用法和祈使句 编稿老师一校 林卉 二校 李秀卿 审核 崔小芳一、学习目标: 1. Be 动词:am, is, are2. 祈使句二、重点、难点:1. 正确使用be 动词am, is, are 。

2. 明确祈使句的概念并掌握其常见的句型结构。

三、考情分析:近年来,小学三年级英语试题对be 动词和祈使句的考查主要集中以下两方面:1. 正确使用be 动词:am, is, are 。

2. 熟练使用祈使句。

四、知能提升:(一)知识讲解I. Be 动词1. 分类:英语中be 动词的一般现在式有三个,分别是:am,is,are .2. 用法:am 和主语I (我)连用。

is 用于he (他), she (她), it (它)和主语是单数的句子当中。

are 用于we (我们), you (你们), they (他们)和主语是复数的句子中。

例:I am a student.He ’s a postman. She isn’t my English teacher .Tom and I are the same age.Where is my dress? Here it is .Where are my shoes? Here they are.We are both tall.You are tall, too.小结:be 动词用法结构图:is Tom It She He not m I')(am I ⎪⎭⎪⎬⎫↓否 t isn')(否 are boys The I and Tom You They We ⎪⎪⎪⎭⎪⎪⎪⎬⎫(否)aren’tbe 动词用法歌诀:Be 动词,兄弟仨,am, is, 还有are 。

我(I)用am ,你(you)用are ,is用于他(he),她(she),它(it)。

单数名词用is,复数名词都用are 。

【考题链接】1. Hello! Here _____an orange for you !A. amB. isC. are答案:B思路分析:主语an orange是单数形式。

2. My books _____ very useful .A. amB. isC. are答案:C思路分析:主语My books是复数形式。

3. I have two pens. They ____ new. One ____ green and the other _____ blue .A. am, is ,amB. is, are, isC. are, is, is答案:C思路分析:主语they是复数形式。

One 是单数形式,the other 意为“另一个”,也是单数形式。

II.祈使句<一>定义:祈使句表示请求、命令、建议等。

谓语动词一律用原形。

句子中通常不用主语,句末用惊叹号或句号,用降调来读。

<二>分类:肯定的祈使句和否定的祈使句.1. 肯定的祈使句a. 句型:动词原形~.(省略主语)Stand up.起立。

Be quiet,please.请安静。

比较陈述句:You sit down.你坐下来。

祈使句:Sit down.坐下。

(省略主语you)注意:有时,为了加强语气,可在动词之前加do。

Do sit down.务必请坐。

Do study hard.一定要努力学习。

b. 用客气的语气表示祈使句时,可在句首或句尾加上please,但如果在句尾加please,那在please之前一定要加一个逗号“,”。

Come this way,please.请这边走。

注意:祈使句中如果有呼唤语,一定要用逗号“,”隔开,呼唤语可出现在句首或句尾。

Li Ming,come here.李明,过来。

Come here,Li Ming.过来,李明。

c. 含有第一、第三人称主语的祈使句Let's say good-bye here.我们在此道别吧。

Don't let him do that again.别让他再那么做了。

句型:Let+第一人称(me,us)~.Let+第三人称代词(宾格:him,her,it,them)或名词~.Let's go at once.咱们马上动身吧。

Let me try again.让我再试试。

Let Tom go there himself.让汤姆自己去那儿。

注意:Let's包括听话者,Let us不包括听话者。

用于反意疑问句时最明显。

Let's go,shall we?咱们去吧,怎么样?Let us help you,will you?让我们帮帮你,好吗?2. 否定的祈使句句型a:Don't +动词原形~Don't swim in the river.别在河里游泳。

Don't be late.别迟到。

Please don't be noisy.请不要大声喧哗。

注意:表示禁止时,尤其是标语等也可用“No+名词/动名词”的形式来表示。

No smoking!禁止吸烟!No parking!禁止停车!No litter!不准乱扔杂物!句型b:Let's(us,me)+not +动词原形~.Don't let +第三人称代词的宾格或名词+动词原形.Let's not say anything about it.对于这件事,咱们什么也不要说。

Don't let them play with fire.别让他们玩火。

【易错点】1. be 动词的缩写形式:I am =I'm he is =he's it is = it's she is = she's you are=you're we are = we'rethey are = they're is not =isn't are not = aren't*am not 没有缩写形式.I'm不能用在句末。

*2. 祈使句的回答:回答祈使句时,应该说“OK./ All right./ Great./Good idea.”(好的,好吧,好极了) 决不能用“That's OK./ That's all right .”(没关系)如:—Let's fly it .—Great !—Show me your ruler .—All right .【考题链接】1. ________ the duck yellow .A. colourB. ColourC. Colours答案:B思路分析:"colour"作动词时意为“给……涂色”;作名词时意为“颜色”。

祈使句需以动词原形开头且首字母要大写。

2. ___________draw a monkey .A. LetB. LetsC. Let's答案:C思路分析:“Let's”是Let us 的缩写形式。

意为“让我们……”“Let us +动词原形”构成祈使句。

3. —Are you a student ? —Yes, ______.A. I areB. I amC. I'm答案:B思路分析:I 必须与am 连用,但I'm不能用在句末。

4. Everyone _____here today .A. amB. isC. are答案:B思路分析:主语是复合不定代词时,谓语动词用单数。

5. —_____this your chair ? —Yes , it is.A. AmB. AreC. Is答案:C思路分析:"this "意为“这个”,是单数。

主语是单数时,谓语动词须用单数。

(二)即学即练Ⅰ. 用“am , is , are ”填空:1. This____ my mouth .2. How ____you ?3. What______ your name ?4. Mr Wang _____ a good teacher .5. My shoes ______very beautiful .6. _____that your brother ?7. Everything ____ OK .8. I _____ tall and thin.II. 连词成句。

(注意大小写及标点符号)1. are, how , you (?) ____________________ ____2. show , me , your, pencil-box( .) ___________________3. at, my , train , look(. ) ___________ ___ _____4. Let, me, a , look, have (. ) _____________________5. colour, pink , it , and, blue (. ) ______________________下册Unit 1 Let's go to school . L1-L2一、预习新知下节课的主要内容,包括单词:classroom school storybook water bottle;句型:Let’s go to school .Nice to see you again .Look! I have a new...Can I see it ?Sure .Here you are .二、预习点拨思考问题一:新学期开始了,见到同学们你知道该说些什么吗?思考问题二:同学们知道怎样用英语说“学校,教室,故事书和水瓶”吗?(答题时间:30分钟)Ⅰ. 用“am , is , are ”填空:Hello! My friends. How___ you? Now, I will talk about my family and me. There ____four people in my family. They ____ my father, my mother, my little brother and I. My father ___ a doctor. My mother ____ a teacher. My brother ___only 3 years old. He ___lovely.(可爱的) .I ____ 10 years old now. I____ in Class1, Grade 3.I love my family .II. 单项选择:( ) 1. ____ it pink and blue .A. LookB. ColourC. Is( ) 2. ______ draw an egg.A. LetB. LetsC. Let’s( ) 3. ____ some rice, please .A. haveB. HaveC. Drink( ) 4.Here_____ a pear for you .A. areB. amC. is( ) 5. Here you _____ .A. amB. isC. are( ) 6. We ___ all here today.A. amB. isC. are( ) 7. _____make any noise .A. Don'tB. NotC. Can( ) 8. I like my house. It____ big .A. amB. isC. are( ) 9. —What _____this, Li Yan? —____elephant.A. is, AB. are, AC. is, An( ) 10. —Is that ____ eraser?—Yes, it____ .A. a, isB. an, isC. an, isn'tⅠ. 用“am , is , are ”填空:Hello! My friends. How __are_ you? Now, I will talk about my family and me. There are four people in my family. They are my father, my mother, my little brother and I. My father is a doctor. My mother_ is a teacher. My brother is only 3 years old. He is lovely.(可爱的) .I am 10 years old now. I am in Class1, Grade 3.I love my family .II. 单项选择:(B) 1. ____ it pink and blue .A. LookB. ColourC. Is( C ) 2. ______ draw an egg.A. LetB. LetsC. Let’s( B ) 3. ____ some rice, please .A. haveB. HaveC. Drink( C ) 4. Here_____ a pear for you .A. areB. amC. is( C ) 5. Here you _____ .A. amB. isC. are( C ) 6. We ___ all here today.A. amB. isC. are( A ) 7. _____make any noise .A. Don'tB. NotC. Can( B ) 8. I like my house. It____ big . .A. amB. isC. are(C ) 9. —What _____this, Li Yan? —____elephant.A. is, AB. are, AC. is, An(B ) 10. —Is that ____ eraser?—Yes, it____ .A. a, isB. an, isC. an, isn't。