if引导的一般条件句.doc

If 引导的一般条件状语从句条件状语从句概念：在复合句中，由从句表示的状语叫做状语从句。它可以用来修饰主语中的动词.形容词.副词等。根据它表达的意思，状语从句可以分为时间状语从句，地点状语从句，条件状语从句，比较状语从句，目的状语从句，结果状语从句和让步状语从句等。由连接词if或unless引导的状语从句叫做条件状语从句。（注意：在含有条件状语从句的复合句中，如果主句是一般将来时态，从句要用一般现在时主将从现原则)经典语句：If it doesnt rain tomorrow, we will go to the zoo. If you open the door，I will come in.if 引导的条件状语从句 主句用一般将来时，if 从句用一般现在时。 We will go to the park if it is fine tomorrow.如果明天天好的话我们就去公园。 We will go traveling if we have time tomorrow.如果明天我们有时间我们就去旅行。 主句祈使句，if 从句用一般现在时。 Please call me if you need help. 如果你需要帮助请打电话给我。 Sing a song if you feel happy. 如果感到快乐就唱首歌吧！ 主句含有情态动词，if 从句用一般现在时。 You can make a lot of money if you run a company.如果你经营一家公司的话你会装很多钱。 You can get number one if you study hard. 如果你努力学习你就可以得第一。 Mary, what about going boating if it doesnt rain? 玛丽，如果明天不下雨，我们就划船好吗？ Good idea. 好主意。 1、主将从现：主语将来时，从句一般现在时，例：If it is rainy tomorrow，（从句）I will stay at home。（主句）2、虚拟：主句用would do，从句用过去式，具有假设性，一定不会是真的，例如“如果我是你，我不会穿那条裤子”If I were you，I would not wear the pants。我永远都不可能是你，所以是具有假设性的，还有“如果你有一百万，你会怎么做？”突然天降横财机率是很小的，所以也是具有假设性的，像这种几乎不可能发生的事或者根本不会发生的事就用虚拟！条件状语从句和主句还有一个共同的伙伴，有时它可以替代从句和主句，它就是“祈使句+and / or+简单句”。其中and表示句意顺承；or则表示转折，意为“否则”。例如： If you work harder, youll pass the exam. = Work harder, and youll pass the exam. 如果你再努力些，你就会通过考试。 If you dont hurry up, youll miss the train. = Hurry up, or youll miss the train. 如果你不快点儿，你就赶不上火车了。 在学习条件状语从句时，同学们要注意以下几点： 一、时态 如果主句是一般将来时态，这时从句不可以用将来时态，而要用一般现在时。例如： I wont go there with you if it rains tomorrow. 如果明天下雨的话，我就不和你一起去那儿了。 二、主从句的位置 大多数情况下，从句可以位于主句之前，也可以位于主句之后。不过从句在前时，主从句之间必须用逗号隔开。例如： Please tell me if he comes back. = If he comes back, please tell me. 如果他回来了，请告诉我一声。词的适当形式填空1. If you wear jeans, we _ (not let) you in. 2. If you go to the party, you _ (have) a great time. 3. If he _ (come) tomorrow, I _(call).4. What _ you _ (do) if you _ (be ) A teacher? 5. Look at the clouds. It _ (rain).6. Kate usually _ (watch) TV on Sundays.7. Listen! Who _ (sing) in the next room?8. They _ (get) to Shanghai two days ago.9. If it _ (be) fine next Sunday, we _ (help) the farmers pick apples.10. How soon _ you _ (finish) the work?11. Let me _(tell) you _ (say) it like this.12. Dont make any noise. The baby _- (sleep) now.13. It _ (take) me half an hour _(learn) this text by myself yesterday.14. He with his friend _ (go) to help Grandma Li three times a week. 15. My mother is watering these _ (flower).16. If you _(stay) at home tomorrow, youll see him.17. If you drive to Shanghai next week, your parents_(be ) angry.18. If he _(ride) his bike to go to school tomorrow, he will be late.19. If it _ (not rain) tomorrow, we will meet you.20. If you _ (not help) me, I wont let you come in.21. Do you know what _-(happen) in ten years.22. There _ (be) a speech by our headmaster tomorrow afternoon in our school.根据括号内的要求，改写下列各句，每空一词。1. Ill go to your birthday party if Im free.（对划线部分提问）_ will you _ if you are free?2. Theyll ask you some questions.（一般疑问句）_ they ask you _ questions?3. If Im a teacher, _（完成句子）4. If he doesnt help me, I wont buy the car,（改为简单句）I wont buy the car_ _ help.翻译下列句子1.如果我明天有时间， 我就和你一起玩。If I _ _ tomorrow, I _ _ with you.2.今天晚上如果有足球赛，他们就不上学了。If there _ a football match, they _to school.3.如果明天不下雨，我们就去公园。If it _ _ tomorrow, we _ _ to the park.Learning English is very interesting, dont you think so?1.If you _ to the party, youll have a great time. A. will go B. went C. go D. going2 I _ her the answer if she _me. A. can tell, will ask B. will tell, will ask C. would tell, ask D. will tell, asks3. 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 rain4.Do you know when he will come back tomorrow?-Sorry, I dont know. When he _ back, Ill tell you. A. comes B. will come C. come D. may come 5. What will you do if you _ to the old folks home visit?A. go B. went C.going D. will go6. If I eat _ food, Ill be very fat.A. too many B. many too C. too much D. much too7. Ill give the book to him if he _ here next Sunday.A. will come B. comes C. is coming D. came8. There _an English film in our school tomorrow.A. is going to have B. will have C. is going to be D. has9. Could you tell us where _？A. will the next Olympic Games held B. the next Olympic Games will be heldC. would the next Olympic Games be held D. the next Olympic Games would be held10. When my mother returned last night, I _ a book. A. read B. am reading C. was reading D. am going to read11.What _ you _ when it began to rain?A. do, do B. were, doing C. are, doing D. did, do12. Ill wake you up when he _back.A. will B. is going to come C. comes D. come二、用所给词的适当形式填空1.If you _(feel) tired, you _ (have) to have a rest.2. Where _ he _(see) the film if he _(have) time?3. If there _(be) fewer trees, there _( be) more pollution.4. He _(dress) more casually if he _( not work) on weekends.5. If Marcia _(live) alone, she _( keep) a pet parrot.6. Lana _（buy） a new dress if the old one _(be) out of style.7.The twins _(fight) if they_(argue).8. I _(have) a bake sale if I _(need) money for education.9. Peter _( send) me a beautiful souvenir if he _(tour) Spain.10. If Mr Green _ (say) I am hard- working, my parents _( feel) glad.11.I _(go) to the beach if it_( not rain) this week.12. _they _( have) a match if the P.E. teacher _(be) busy?13.He _(write) a letter to his grandparents if he _(get) his report card this week.14. If she _(get) up late, she _( not catch) the early bus.15. Peter _(major) in English if he _(pass) the exams in Peking University.III完成句子1.如果他到的晚了会发生什么事情？What _ if he _ late?2. 如果努力学习，你就会取得好成绩。If you_ _, you _ good _.3. 他如果看电视太久了，他的父母会不高兴。If he_TV too much, his parents _ _unhappy.4. 如果我们为他组织生日聚会，大家都会来的。Everyone _ if we _a birthday party _ him.5. 如果明天不下雨，我会和你一起去公园的。 If it _ _tomorrow, I _ go to the park _you.6. 如果她睡过头了，就会旅游迟到的。She_ _ _ _ the trip if she _ _ 7. 如果他有空，他会帮助你的。If he _ _ , he _ _ you.8. 如果Tom考试不及格，他就没有机会上高中了。Tom _have the _to go to the high school if he _the ex