初中祈使句課件.ppt

1、祈使句,祈使句的定義,祈使句表示請求、命令、建議等等。 謂語動詞一律用原形。 句子中通常不用主語，句末用驚嘆號或者句號。,Turn left!,Turn right!,Walk on the zebra crossing!,Dont smoke! No smoking!,Dont park your car!,Dont eat!,Dont pick the flowers!,Go upstairs!,Read and observe the difference,Turn left!,Turn right!,Please go upstairs!,Go downstairs!,Walk on

2、the zebra crossing!,Dont smoke!,Dont play football!,Dont park your car!,Please dont eat!,Dont pick the flowers!,Draw the conclusion (得出結(jié)論),祈使句的結(jié)構(gòu)如下： (Please) + do sth. (Please) + Dont do sth.,肯定：,否定：,祈使句的句型,Be quiet. Please have a seat. David, pay attention.,Dont be afraid. Please do not make a nois

3、e. Alan, dont be late.,1.動詞+ 2. Please+動詞 3. 人名+動詞,肯定,否定,在動詞前面加dont否定,祈使句句式詳解,1.肯定的祈使句 （1）動詞原形+其他 Standup,please.=Pleasestandup.請起立。 （2）Be+adj. Becareful!=Lookout!=Takecare!小心/當(dāng)心！ （3）Lets+動詞原形 Letsgotoschooltogether.咱們一起上學(xué)去吧。,祈使句句式詳解,2.否定的祈使句 （1）Dont+動詞原形 Dontstandup.別站起來。 Dontbecareless.別粗心。 Dontle

4、tthemplaywithfire.別讓他們玩火。 （2）Lets(letsb)+not+動詞原形 Letsnotsayanythingaboutit.對于這件事，咱們什么也別說。 Letthemnotplaywithfire.別讓他們玩火。,祈使句句式詳解,3.祈使句謂語用何動詞形式 英語祈使句的謂語總是用動詞原形。如： Be quiet! 別說話! Come earlier next time. 下次早點(diǎn)來。 Have a good time. 愿你玩得痛快。 Go and tell her. 去告訴她吧。 注：有時(shí)為了加強(qiáng)語氣，可在動詞前加do。如： Do be careful. 務(wù)請小

5、心。 Do come on time. 務(wù)必請準(zhǔn)時(shí)來。,祈使句句式詳解,4.關(guān)于以let開頭的祈使句 Lets eat out tonight. 我們今晚出去吃飯吧。 Let me have a try. 我來試一試。 Let me show you how to do it. 我來告訴你怎樣做。 Let every man do his best. 讓每個(gè)人人盡其才。 Let the meat cook slowly. 把肉用慢火燉。,1. 這類祈使句的否定式有兩種形式。如： Lets not hurry. / Dont lets hurry. 我們不要太急。 2. let后用作賓語補(bǔ)足語的

6、動詞要用原形，不能用帶to的不定式。,祈使句句式詳解,5.與please連用以使語氣委婉 為使語氣委婉，通常將祈使句與please連用。Please可用于祈使句的句首(其后通常不用逗號)或句末(其前通常用逗號)。如： Please dont get angry. 請不要生氣。 Please drive more slowly. 請開得慢一點(diǎn)。 Please cut me a piece of cake. 請給我切一塊蛋糕。 Please try to be quiet. 請?jiān)O(shè)法保持安靜。 Please repeat what youve just said. 請把你剛才說的話重復(fù)一遍。,祈使句

7、與反意疑問句,一、基本原則 若陳述部分為祈使句，反意問句通常用will you, wont you, would you等。如： Mail the letter today, will you? 今天就把信發(fā)掉，好嗎? Try to be back by two, wont you? 設(shè)法兩點(diǎn)之前回來，好嗎? 注：若陳述部分為否定式，則反意問句部分只用will you。如： Dont forget to post the letter, will you? 請別忘了寄信。 有時(shí)根據(jù)語境的需要，反意問句也可以用can you, cant you 等： Give me some cigarette

8、s, can you? 給我些香煙，可以嗎? Walk faster, cant you? 走快點(diǎn)，不行嗎?,祈使句與反意疑問句,二、let型 1. 當(dāng)祈使句為Lets時(shí)：反意問句總是用 shall we。如： Lets phone her now, shall we? 我們現(xiàn)在就給她打電話，好嗎? Lets go to the cinema tonight, shall we? 今晚咱們?nèi)タ措娪?，好? 2. 當(dāng)祈使句為Let us時(shí)：若表示請求，反意問句用will you;若表示表示建議，則用 shall we。如： Let us know your address, will you?

9、請把你的地址告訴我們，好嗎? Let us go swimming together, shall we? 我們一起去游泳好嗎? 注：lets只表示建議，所以其后反意問句總是用shall we。而let us既可表示建議請求，也可表示建議(較正式)，其后的反意問句要根據(jù)這兩種不同情況分別使用will you和shall we。,Lets do more exercises.,1. Call me when you get home. OK, _. A. I must B. I can C. I will D. I may 2. Jim, _ me a hand. A. gives B. is

10、giving C. give D. will give 3. Let me _ on duty today. A. am B. / C. be D. do 4. Lets _ our time. A. not waste B. no wasting C. not to waste D. no waste 5. _ higher, and you will see the house. OK. A. If you stand B. To stand C. When you stand D. Stand,C,C,C,A,D,Choose the correct answer.,6. _ forge

11、t to write to me when you _ get there next Tuesday. A. Dont; will B. Please; will C. Please; / D. Dont; / 7. Please _ do it. A. he B. he let C. let him D. him 8. _ come in, please. A. Will B. Do C. Wont D. Did 9. _ careful! A. Be do B. Do be C. Not D. Not do 10. _ let anyone open the door. A. Dont B

12、. Will C. Not D. No,D,C,B,B,A,11. Let John finish the work all by himself, _? A. shall we B. will you C. do you D. do we 12. -Lets go home, shall we? - _. A. Thats right. B. Thats all C. Thats all right D. All right 13.Please turn on the light, _? A. are you B. shall we C. shall I D. will you 14. Do

13、nt tell him the fact now, _? A. shall we B. shall you C. will you D. do you 15.Let the children not make so much noise, _? A. shall we B. will you C. shall I D. do you,B,D,D,C,B,16. _ 6 and 4, and you will get ten. A. Added B. Adding C. To add D. Add 17._ late again, or Ill report it to your father. A. Dont be B. You arent C. Cant be D. Arent 18.Dont interrupt her when she is speaking, _? A. wont you B. will