初中英語(yǔ)if條件句

1、WORD格式定義：常見(jiàn)的 if 條件狀語(yǔ)從句表示在某條件下，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。E.g. If you ask him， he will help you 如果你請(qǐng)他幫助，他會(huì)幫你的。E.g. If you fail in the exam ， you will let him down 如果你考試不及格，你會(huì)讓他失望的。E.g. If you have finished the homework， you can go home如果你作業(yè)做完了就可以回家了。另外，if 從句還表示不可實(shí)現(xiàn)的條件或根本不可能存在的條件， 也就是一種虛擬的條件或假

2、設(shè)。 從句多用一般過(guò)去時(shí)或過(guò)去完成時(shí)， 表示對(duì)現(xiàn)在或過(guò)去的一種假設(shè)。E.g.If I were you ， I would invite him to the party 如果我是你，我會(huì)邀請(qǐng)他參加聚會(huì)。E.g.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(lái)得早一些。另外你還要注意if 條件句的時(shí)態(tài)搭配1if 從句用一般現(xiàn)在時(shí)，主句用一般將來(lái)時(shí)E.g. If he runs he ll get there in time.如果他用跑的，他就會(huì)及時(shí)趕到那兒。E.g. 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。2if 從句用一般現(xiàn)在時(shí)，主句用may/might/canE.g. If the fog gets thicker the plane may/might be diverted.如果霧在大一些，飛機(jī)可能就會(huì)改在別的機(jī)場(chǎng)降落。E.g. If it stops snowing we can go out.如果雪停了，我們就可以出去。3if 從句用一般現(xiàn)在時(shí)，主句用must/shouldE.g. If you want to lose weight you must/should e

4、at less bread.如果你想減肥，你必須少吃面包。4if 從句用一般現(xiàn)在時(shí)，主句用一般現(xiàn)在時(shí)E.g. If you heat ice it turns to water. (也可用 will turn)如果把冰加熱，它就會(huì)化成水。5if 從句用現(xiàn)在進(jìn)展時(shí)，主句用一般將來(lái)時(shí)E.g. If you are looking for Peter you ll find him upstairs.專(zhuān)業(yè)資料整理WORD格式1專(zhuān)業(yè)資料整理WORD格式如果你是在找彼得，上樓就會(huì)找到他。6if 從句用現(xiàn)在完成時(shí)，主句用一般將來(lái)時(shí)E.g. If you have finished dinner I ll

5、ask the waiter for the bill.如果你吃完了，我就叫效勞生來(lái)算賬注意 ：學(xué)習(xí) " if "引導(dǎo)的條件狀語(yǔ)從句的用法,現(xiàn)在總結(jié)一下 :if 條件句不一般 ,幾個(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(lái)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(yǔ)從句中，如果從句談?wù)摰氖且粋€(gè)有可能發(fā)生的事實(shí)及其產(chǎn)生的相關(guān)的結(jié)果，主句用一般將來(lái)時(shí)態(tài)，從句用一般現(xiàn)在時(shí)態(tài)。如：E.g. We can walk there if we can't find a bus .E.g. If it rains tomorrow

6、,we will not goto the zoo.E.g. What will youdo if youfind a panda in danger.如果 if 條件句談?wù)摰氖侵貜?fù)發(fā)生和預(yù)示要發(fā)生的情景和事件，那么主從句大多用一般現(xiàn)在時(shí)態(tài)。E.g. If bears are in danger ,they attack people.在 if 引導(dǎo)的條件狀語(yǔ)從句中， if 和條件句位置靈活，可直接放在主句后面，假設(shè) if 條件句放句首， 從句后面要加逗號(hào)，和主句隔開(kāi)。還要注意前后時(shí)態(tài)一致原那么【經(jīng)典練習(xí)】一 .單項(xiàng)選擇1.If you _ to the party, youll have a

7、 great time.A. will goB. wentC. goD. going2.It will be a long time _ Peter _ his work.A.since, has finishedB. after, finishesC. when, will finishD. before, finishes.3.What will father _ us from Japan"A. takeB. bringC. carryD. make4.Weifang is famous _ kites.專(zhuān)業(yè)資料整理WORD格式2專(zhuān)業(yè)資料整理WORD格式A. forB. toC

8、. onD. with5 I _ her the answer if she _me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, asks6. What are you going to do tomorrow"-We ll go to the library tomorrow if it _.A. isn t rainB. rainC. won t rainD. doesn t rain7. Do you know when he will come back tomorrow

9、"-Sorry, I don t know. When he _ back, I ll tell you.A. comesB. will comeC. comeD. may come8. What will you do if you _ to the old folks home visit"A. goB. wentC.goingD. will go9. If I eat _ food, Ill be very fat.A. too manyB. many tooC. too muchD. much too10. I ll give the book to him if

10、he _ herenxt Sunday.A. will comeB. comesC. is comingD. came11. There _an English film in our school tomorrow.A. is going to haveB. will haveC. is going to beD. 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

11、 heldD. the next Olympic Games would be held二在正確的答案下劃一條線。1. Daina ( will go/go/goes) to Europe if she (will pass/pass/passes) the exams .2. The graduates (will teach/teach/teaches)in the poor village if the Ministry of Education (will agree/ agree/agrees) soon.3. If there (will be/ are/is) a car acc

12、ident, they (will call/call/calls) 110 for help at專(zhuān)業(yè)資料整理WORD格式3專(zhuān)業(yè)資料整理WORD格式once.4. If it (won t/don t/doesn t/ isn t) rainy, we (will take/ take/takes) walk outside.5. If a UFO (will land/land/lands) in front of me, I (will go/go/goes) in to look for the alien.6. If he (will have/have/has) money, he

13、 (will bulid/build/builds) a science lab.7.Don t wait for me if I (am/ will be) late.8.They (won t/don t) go to the beach if it (will rain/rain /rains).9. I (will call/ call) you if he (will stay/stay /stays) at home.10. Mr Smith (will let/ let/lets) you know if he (will need/ need/ needs) help.11.(

14、Will / Do/ Does) he visit the museum if he (won t / dontired" t/ doesn t) get12.Where (will/ do/does) they live if they (will miss/ miss/ misses) the bus"三、用所給詞的適當(dāng)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)

15、 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 f

16、or 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 grandparen

17、ts if he _(get) his report card thisweek.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.專(zhuān)業(yè)資料整理WORD格式4專(zhuān)業(yè)資料整理WORD格式三翻譯句子1.如果他到的晚了會(huì)發(fā)生什么事情？What _ if he _ late"2. 如果努力學(xué)習(xí)，你就會(huì)取得好成績(jī)。If you_ _, you _ good _.3. 他如果看電視

18、太久了，他的父母會(huì)不快樂(lè)。If he _ TV too much, his parents _ _ unhappy.4. 如果我們?yōu)樗M織生日聚會(huì)，大家都會(huì)來(lái)的。Everyone _ if we _ a birthday party _him.5. 如果明天不下雨，我會(huì)和你一起去公園的。Ifit _ _ tomorrow, I _ go to the park_ you.6. 如果她睡過(guò)頭了，就會(huì)旅游遲到的。She_ the trip if she _.7. 如果他有空，他會(huì)幫助你的。If he _, he _you.8. 如果 Tom 考試不及格，他就沒(méi)有時(shí)機(jī)上高中了。Tom _have t

19、he _to go to the _high school if he _the exams.1.If she _(not get) home on time, her mom will be worried.2.If Tom works hard, he_(make) a lot of money.3.If I study hard, my dream _實(shí)(現(xiàn) ).4. If he _(爭(zhēng)論 )his friend, he will be very sad. 5.If you fight with your brother, what _(發(fā)生 )"6. Call me if h

20、e _回(來(lái) ).7. He can make great progress if he _追(隨，聽(tīng)從 ) my advice.()8. If I find his phone number, I _ you.A. tellB. toldC. will tellD. have told()9. I _ the CDs to you if I have time tomorrow.A. will returnB. returnedC. have returned D. return()10. The students will go to the Summer Palace if it _tomorrow.A. won' t rainB. isn' t rainingC. doesn' t rainD. isn' t rain專(zhuān)業(yè)資料整理WORD格式5專(zhuān)業(yè)資料整理WORD格式()11. I won t watch the TV play if my father _ me do my homework.A. letB. will letC. won t letD. lets()12. If you _quiet, I ll tell you what happened.A. willB. areC