人教版小學三年級英語寒假專題――Be動詞用法和祈使句

1、 一、學習目標: 1. Be 動詞:am, is, are2. 祈使句二、重點、難點:1. 正確使用be 動詞am, is, are 。2. 明確祈使句的概念并掌握其常見的句型結(jié)構(gòu)。三、考情分析:近年來,小學三年級英語試題對be 動詞和祈使句的考查主要集中以下兩方面:1. 正確使用be 動詞:am, is, are 。2. 熟練使用祈使句。四、知能提升:(一知識講解I. Be 動詞1. 分類:英語中be 動詞的一般現(xiàn)在式有三個,分別是:am,is,are .2. 用法:am 和主語I (我連用。is 用于he (他, she (她, it (它和主語是單數(shù)的句子當中。are 用于we (我們,

2、 you (你們, they (他們和主語是復(fù)數(shù)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.小結(jié):be 動詞用法結(jié)構(gòu)圖: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 動詞用法歌訣:Be 動詞,兄弟仨,am, is, 還有are 。我(I用am ,你(you用are ,is用于他(he,她(she,它(it。單數(shù)名詞用is,復(fù)數(shù)名詞都用are ?！究碱}鏈接】1. Hello! Here _an orange for you !A. amB. isC. are答案:B思路分析:主語an orange是單數(shù)形式。2. My books _ very useful .A. amB. isC. are答案:C思路分析:主語My books是復(fù)數(shù)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:主語they是復(fù)數(shù)形式。One 是單數(shù)形式,the other 意為“另一個”,也是單數(shù)形式。II.祈使句<一>定義:祈使句表示請求、命令、建議等。謂語動詞一律用原形。句子中通常不用主語,句末用驚嘆號或句號,用降調(diào)來讀。<二>分類:肯定的祈使句和否定的祈使句.1. 肯定的祈使句a. 句型:動詞原形.(省略主語Stand up.起立。Be quiet,please.請安靜

5、。比較陳述句:You sit down.你坐下來。祈使句:Sit down.坐下。(省略主語you注意:有時,為了加強語氣,可在動詞之前加do。Do sit down.務(wù)必請坐。Do study hard.一定要努力學習。b. 用客氣的語氣表示祈使句時,可在句首或句尾加上please,但如果在句尾加please,那在please之前一定要加一個逗號“,”。Come this way,please.請這邊走。注意:祈使句中如果有呼喚語,一定要用逗號“,”隔開,呼喚語可出現(xiàn)在句首或句尾。Li Ming,come here.李明,過來。Come here,Li Ming.過來,李明。c. 含有第一、

6、第三人稱主語的祈使句Let's say good-bye here.我們在此道別吧。Don't let him do that again.別讓他再那么做了。句型:Let+第一人稱(me,us.Let+第三人稱代詞(賓格:him,her,it,them或名詞.Let's go at once.咱們馬上動身吧。Let me try again.讓我再試試。Let Tom go there himself.讓湯姆自己去那兒。注意:Let's包括聽話者,Let us不包括聽話者。用于反意疑問句時最明顯。Let's go,shall we?咱們?nèi)グ?怎么樣?Le

7、t us help you,will you?讓我們幫幫你,好嗎?2. 否定的祈使句句型a:Don't +動詞原形Don't swim in the river.別在河里游泳。Don't be late.別遲到。Please don't be noisy.請不要大聲喧嘩。注意:表示禁止時,尤其是標語等也可用“No+名詞/動名詞”的形式來表示。No smoking!禁止吸煙!No parking!禁止停車!No litter!不準亂扔雜物!句型b:Let's(us,me+not +動詞原形.Don't let +第三人稱代詞的賓格或名詞+動詞原形.

8、Let's not say anything about it.對于這件事,咱們什么也不要說。Don't let them play with fire.別讓他們玩火?！疽族e點】1. be 動詞的縮寫形式: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 沒有縮寫形式.I'm不能用

9、在句末。*2. 祈使句的回答:回答祈使句時,應(yīng)該說“OK./ All right./ Great./Good idea.”(好的,好吧,好極了 決不能用“That's OK./ That's all right .”(沒關(guān)系如:Let's fly it .Great !Show me your ruler .All right .【考題鏈接】1. _ the duck yellow .A. colourB. ColourC. Colours答案:B思路分析:"colour"作動詞時意為“給涂色”;作名詞時意為“顏色”。祈使句需以動詞原形開頭且首字母要

10、大寫。2. _draw a monkey .A. LetB. LetsC. Let's答案:C思路分析:“Let's”是Let us 的縮寫形式。意為“讓我們”“Let us +動詞原形”構(gòu)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 必須與am 連用,但I'm不能用在句末。4. Everyone _here today .A. amB. isC. are答案:B思路分析:主語是復(fù)合不定代詞時,謂語動詞用單數(shù)。5. _this your chair ? Yes , it is

11、.A. AmB. AreC. Is答案:C思路分析:"this "意為“這個”,是單數(shù)。主語是單數(shù)時,謂語動詞須用單數(shù)。(二即學即練. 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. 連詞成句。(注意大小寫及標點符號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 (. _ 下冊Unit 1 Let's go to school . L1-L2一、預(yù)習新知下節(jié)課的主要內(nèi)容,包括單詞: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、預(yù)習點撥思考問題一:新學期開始了,見到同學們你知道該說些什么嗎?思考問題二:同學們知道怎樣用英語說“學校,教室,故事書和水瓶”嗎? (答題時間:30分鐘. 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.(可愛的 .I _ 10 years old now. I_ in Class1, Grade 3.I love my family .II. 單項選擇:( 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.(可愛的 .I am 10 years old now. I am II. 單項選擇： ( 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