if引導(dǎo)的條件狀語從句總結(jié)+習(xí)題.doc

if引導(dǎo)的條件狀語從句課本鏈接 If you do, youll be sorry. (Unit 5, Section A)定義 :if引導(dǎo)的條件狀語從句表示假如從句的動作發(fā)生，主句的動作就（不）會發(fā)生。句子結(jié)構(gòu) if 引導(dǎo)的條件狀語從句位置靈活，可直接放在主句后面，也可以放在句首。放在句首時，從句后面要用逗號和主句隔開。如：Ill go to see you if I have time. 如果有時間，我就去看你。If it rains tomorrow, well stay at home. 如果明天下雨，我們就呆在家里。時態(tài)呼應(yīng) 在復(fù)合句中： 當(dāng)主句是一般現(xiàn)在時或是一般將來時時；（2）當(dāng)主句是祈使句時；（3）當(dāng)主句含有情態(tài)動詞時，if引導(dǎo)的條件狀語從句通常用一般現(xiàn)在時。用法例句 主句為一般將來時態(tài)，if從句用一般現(xiàn)在時態(tài)。（主將從現(xiàn)）We will stay at home if it rains tomorrow.如果明天下雨，我將要呆在家。 主句中含有情態(tài)動詞，if從句用一般現(xiàn)在時態(tài)。（主情從現(xiàn)）如：may/might/can/could/must/should/would If you finish your homework, you can go home now.如果你做完了作業(yè)，你現(xiàn)在可以回家了。主句為祈使句，if從句用一般現(xiàn)在時態(tài)。（主祈從現(xiàn)）Dont jump into the river if you feel very hot.如果你感到很熱，不要跳入河里。主句為一般現(xiàn)在時時態(tài)，if從句用一般現(xiàn)在時態(tài)。（主現(xiàn)從現(xiàn)）Its dangerous if you play with the knife.玩兒刀是危險的。如：If she doesnt come, she will be sorry. 如果她不來，她會遺憾的。Have a good rest if you are tired. 如果累了，你就好好休息一下。We must study hard if we want to pass the final exam. 如果想通過期末考試，我們必須努力學(xué)習(xí)。同義句轉(zhuǎn)換 1. 用“祈使句 and / or 一般將來時的句子”轉(zhuǎn)換。如：If you work hard, youll pass the exam easily. Work hard, and youll pass the exam easily. 努力學(xué)習(xí)，你將很容易通過考試。If you dont hurry up, youll miss the train. Hurry up, or youll miss the train. 快點兒，否則你就趕不上火車了。 2. 用含介詞with或without的介詞短語轉(zhuǎn)換。如：If there is no water, fish cant live. Fish cant live without water. 離開水，魚不能生存。【邊學(xué)邊做】1. If there_ no buying and selling of animals, there_ no killing in nature.A. is; will he B. will be; will beC. is; is D. will be; is2. The students _ have a sports meeting this weekend if it _.A. wont; rainsB. will; rains C. wont; will rainD. are going to; is going to rain3. If you _ to the party, youll have a great time. A. will go B. went C. go D. going4.-What are you going to do tomorrow? -Well go to the library tomorrow if it _. A. isnt rain B. rain C. wont rain D. doesnt rain5. If I eat _ food, Ill be very fat. A. too many B. many too C. too much D. much too6. Ill give the book to him if he _ here next Sunday.A. will come B. comes C. is coming D. came7. Your teacher will be unhappy if you _ to school late.A. come B. will come C. are coming D. came 8. I dont know if he _. If he _, please let me know.A. comes, comes B. will come, will comeC. will come, comes D. comes, will come9. If she _ here tomorrow, I will tell you.A. comesB. will come C. come D. came10. Tom wants to know if you will have a picnic tomorrow. Yes. But if it _, well play chess instead.A. will rain B. rained C. is raining D. rains11. If Tom _ the game, well give him a surprise.A. win B. wins C. wonD. miming二、用所給詞的適當(dāng)形式填空。1. What will you buy if you _（have）a lot of money?2. If it _（not snow）tomorrow, we will feel unhappy.3. You mustnt go to school if you _（be）still in bed.4. If he _（be）at home at that time, he would know it.5. Please show me the way if you _（know）it.6. You will hurt your teeth if you _（eat）too much candy.7. If you gave me a toy car, I _（be）very happy.8. I w