人教版小学三年级英语寒假专题――Be动词用法和祈使句

1、 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,

2、 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 isnt 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 T om It She He not m I'(am I 否 t isn'(否 a r e b o y s T

3、h e I a n d T o m Y o u T h e y We (否arentbe 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

4、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

5、。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、

6、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?Le

7、t 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.

8、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

9、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

10、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

11、.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. 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,

12、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:Lets go to school .Nice to see you again .Loo

13、k! 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. 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

14、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. Lets( 3. _ some rice, please .A. haveB. HaveC. Dr

15、ink( 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,

16、 it_ .A. a, isB. an, isC. an, isn't . 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 y

17、ears old. He is lovely.(可爱的 .I am 10 years old now. I am II. 单项选择： ( B 1. _ it pink and blue . A. Look B. Colour C. Is ( C 2. _ draw an egg. A. Let B. Lets C. Lets ( B 3. _ some rice, please . A. have B. Have C. Drink ( C 4. Here_ a pear for you . A. are B. am C. is ( C 5. Here you _ . A. am B. is C. are ( C 6. We _ all here today. A. am B. is C. are ( A 7. _make any