if引導(dǎo)條件狀語從句講解與練習(xí)

1、精品文檔初中英語一 一if引導(dǎo)的條件狀語從句引導(dǎo)條件狀語從句最常用的連詞是】f,常見的】f條件狀語從句衣示在某條件下，某事很可能發(fā)生,條件是可能存在的，主句中某種情況發(fā)生的概率也是很高的。女11：If you ask lum, he will help you.如果你請(qǐng)他幫忙，他會(huì)幫你的。If you fail in the exam you will let lum down.如果你考試不及格，你會(huì)讓他失望的。If you have finished the homzvork, you can go home 如果你作業(yè)做完了 就可以回家了。另外，if從句還衣示不可實(shí)現(xiàn)的條件或根本不可能存在

2、的條件，也就是-種虛擬的條件或假設(shè)。 從句多用般過去時(shí)或過去完成時(shí)，表示對(duì)現(xiàn)在或過去的-種假設(shè)。女LI：If I were you I would invite lum to the party.如果我是你，我會(huì)邀請(qǐng)他參加聚會(huì)。I would have arrived much earlier if I had not been caught in the traffic 要不是交通堵塞，我本會(huì)來 得早一 些。另外你還要注意if條件句的時(shí)態(tài)搭配1. if從句用一般現(xiàn)在時(shí)，主句用一般將來時(shí)If he runs hell get there m time.如果他用跑的，他就會(huì)及時(shí)趕到那兒。The

3、cat will scratch you if you pull her tail.如果你拉貓的尾巴，它就會(huì)抓你。2. if從句用般現(xiàn)在時(shí)，主句用may/might/canIf the fog gets tlucker the plane may/might be diverted.如果霧在人些，飛機(jī)可能就會(huì)改在別的機(jī) 場(chǎng)降落。If it stops snowing we can go out.如果雪停f,我們就可以出去。3. if從句用般現(xiàn)在時(shí)，主句用mxist/shouldIf you want to lose weight you nmst/should eat less bread.如

4、果你想減肥，你必須少吃面包。4. if從句用-般現(xiàn)在時(shí)，主句用一般現(xiàn)在時(shí)If you heat ice it nuns to water, （til可用will turn）如果把冰加熱，它就會(huì)化成水c5. if從句用現(xiàn)在進(jìn)行時(shí)，主句用般將來時(shí)If you are looking for Peter youll find him upstairs.如果你是在找彼得，上樓就會(huì)找到他。6. if從句用現(xiàn)在完成時(shí)，主句用-般將來時(shí)If you have finished dinner Pll ask the waiter for the bill.如果你吃完 了，我就叫服務(wù)生來算賬精品文檔.精品文檔注

5、意：學(xué)習(xí)if引導(dǎo)的條件狀語從句的用法，現(xiàn)在總結(jié)下：if條件句不一般，兒個(gè)要點(diǎn)記心間；條件句，放在前，逗號(hào)要放句中間。條件句表可能，主句多用將來時(shí)；條件句表事實(shí)，主句常用現(xiàn)在時(shí)。在if引導(dǎo)的條件狀語從句中，如果從句談?wù)摰氖莻€(gè)有可能發(fā)生的事實(shí)及其產(chǎn)生的和關(guān)的結(jié)果, 主句用i般將來時(shí)態(tài)，從句用一般現(xiàn)在時(shí)態(tài)。如：We can walk there if we can*t find a bus .If it rains tomorrow ,xve will not go to the zoo.What will you do if you find a panda in danger.如果if條件句談?wù)?/p>

6、的是重復(fù)發(fā)生和預(yù)示要發(fā)生的情景和事件，則主從句人多用般現(xiàn)在時(shí)態(tài)。 如：If bears are in danger .they attack people.在if引導(dǎo)的條件狀語從句中，if和條件句位置靈活，可直接放在主句后面，若if條件句放句 首，從句后面要加逗號(hào)，和主句隔開。還要注總前后時(shí)態(tài)致原則用所給詞的適當(dāng)形式填空l .If you(feel) tired, you(have) to have a rest.3. If there(be) fewer trees, there( be) more pollution.5. If Marcia(live) alone, she(keep)

7、a pet parrot.6. Lana(buy) a new dress if the old one(be) out of style.9. Peter( send) me a beautiful sowenir if lie(tour) Spain.10. If Mr Green(say) I am hard- woriong、my parents( feel) glad.11.1(go) to the beach if it(not ram) this week.13 .He(write) a letter to his grandparents if he(get) his repo

8、rt card this week.14. If she(get) up late, she(not catch) the early bus.15. Peter(major) in English if lie(pass) the exams in Peking University.16. 如果努力學(xué)習(xí)，你就會(huì)取得好成績(jī)。If you, yougood.17. 他如果看電視太久了，他的父母會(huì)不高興。If heTr too much, his parentsiinliappy.18. 如果我們?yōu)樗M織生日聚會(huì)，大家都會(huì)來的。Everyoneif wea birthday partyhim.1

9、9. 如果明天不下雨，我會(huì)和你一起去公園的。If it tomorrow, Igo to the parkyou.21.如果他有空，他會(huì)幫助你的。If lie, he you.23.你如果抄同學(xué)的作業(yè)就不能學(xué)好各門功課=Yougood at all the subjects if youthe other students1 homework.精品文檔.精品文檔I 單項(xiàng)選擇（15分）I. If youto the party, youll have a great time. A. will go B. went C. go D. going2. It will be a long timeP

10、eterhis work.A. since, has finished B. after, finishes C. when, will finish D. before, finishes.3. Wliat will fatherus from Japan? A. take B. bring C. carry D. make4. Weifang is famouskites. A. for B. to C. on D. with5 Iher the answer if she me.A. can tell, will ask B. will tell, will ask C. would t

11、ell, ask D. will tell, asks6. - Whet are you going to do tomorrow*?-Well go to the library tomorrow if it.A. isnt ram B. rain C. wont rain D. doesnt rain7. Do you know when he will come back tomorrow?一Sorry. I dont know. When heback Ill tell you.A. conies B. will come C. come D. may come6 What will

12、you do if youto the old fblks home visit?A. go B. wentC.goingD. will go9. If I eatfood. Ill be very fat.A. too many B. many too C. too much D. much too10. Ill give the book to him if hehere next Sunday.A. will come B. comes C. is coming D. cameII. Therean English film in our school tomorrow.A. is going to have B. will have C. is going to be D. has12. Could you tell us where?A. will the next Olympic Games heldB. the next Olympic Games will be heldC. would the next Olympic Games be heldD. the next Olympic Games would be held13. When my mother returned last night, I a bookA. read B. am reading