初中英語(yǔ)——條件狀語(yǔ)從句

1、學(xué)習(xí)必備歡迎下載初中英語(yǔ) 條件狀語(yǔ)從句一條件狀語(yǔ)從句的概念條件狀語(yǔ)從句，即在某種條件下，一件事情可能發(fā)生。在英語(yǔ)中由連接詞if 或 unless等引導(dǎo)的狀語(yǔ)從句叫做條件狀語(yǔ)從句。條件是指某一件事情實(shí)現(xiàn)之后（狀語(yǔ)從句中），一件事情（主句）才能發(fā)生，通常譯作“假如，只要，如果”等意思。條件狀語(yǔ)從句中，主從句的時(shí)態(tài)要遵循“主將從現(xiàn)”的原則。即，主句是將來(lái)時(shí)態(tài)時(shí)，從句用一般現(xiàn)在時(shí)代替將來(lái)時(shí)態(tài)。二 .條件狀語(yǔ)從句的引導(dǎo)詞1.Ifconj . 如果，假如If you ask him ， 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

2、 will let him down如果你考試不及格，你會(huì)讓他失望的。2.unless conj. 除非 ,若不 ,除非在 的時(shí)候（ if .not. ）You will fail to arrive there in time unless you start earlier.如果你不早點(diǎn)動(dòng)身, 你就不能及時(shí)趕到那兒。Unless it rains, the game will be played.除非下雨, 比賽將照常進(jìn)行。3.so/as long as conj. 只要You may borrow my book as long as you keep it clean.只要你保持書的清

3、潔，你就可以把我的書借去。三關(guān)于條件句的時(shí)態(tài)，常見(jiàn)的有以下三種情況：1、條件狀語(yǔ)從句的主句是一般將來(lái)時(shí)，那么從句常常用一般現(xiàn)在時(shí)。When I grow up, I ll be a nurse and look after patients.我長(zhǎng)大后要當(dāng)一名護(hù)士，照顧病人。2、如果主句是祈使句，那么從句通常要用一般現(xiàn)在時(shí)。If you want to have a chat ,call me up.如果你想聊天，打我電話。3、如果主句是含有情態(tài)動(dòng)詞時(shí)，根據(jù)需要從句多用一般現(xiàn)在時(shí)。學(xué)習(xí)必備歡迎下載You should be quiet when you are in the reading ro

4、om.在閱覽室時(shí)應(yīng)保持安靜。四知識(shí)拓展1 在以 when， before， as soon as等引導(dǎo)的時(shí)間狀語(yǔ)從句，也適用“主將從現(xiàn) ”原則，即如果主句是一般將來(lái)時(shí)，從句則用一般現(xiàn)在時(shí)。I'll tell her the good news when she comes back.當(dāng)她回來(lái)的時(shí)候，我將把這個(gè)好消息告訴她。she will give you a call as soon as she returns.她一回來(lái)就會(huì)給你電話。2.If 條件句的同義句：祈使句，and /or+ 將來(lái)時(shí)態(tài)的陳述句。Work hard ,and you will make great progr

5、ess.=If you work hard,you will make great progress.如果你努力學(xué)習(xí)，你才會(huì)取得大的進(jìn)步。Hurry up, or you will be late.=If you dont hurry up.you will be late.如果你不快點(diǎn)，你就要遲到了。條件狀語(yǔ)從句的時(shí)態(tài)練習(xí)一、用所給詞的適當(dāng)形式填空1.When i _(feel) tired, i _ (have) t a rest.2.Where _ he _(see) the film if he _(have) time?3.Unless there _(be) many trees,

6、 there _( be) more pollution.4.He _(dress) more casually unless he _ work) on weekends.5. If Marcia _(live) alone, she _( keep) a pet parrot.6. Lana _( buy) a new dress as soon as the old one _(be) out of style. 7.The twins _(fight) when they_(argue).學(xué)習(xí)必備歡迎下載8. I _(have) a bake sale if I _(need) mon

7、ey for education.9. Peter _( send) me a beautiful souvenir as long as he _(tour) Spain.10. As long as 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

8、his grandparentsas long as he _(be ) free of task.14.Unless she _(get) up late, she _ (catch) the early bus.15.Peter _(major) in English if he _(pass) the exams in Peking University.15.如果他到的晚了會(huì)發(fā)生什么事情？What _ if he _ late?16. 如果努力學(xué)習(xí)，你就會(huì)取得好成績(jī)。If you_ _, you _ good _.17. 他如果不看電視了，他的父母會(huì)很高興。Unlesshe _ TV

9、too much, his parents _ _ very happy.18. 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.19. 除非明天下雨，否則我將和你一起去公園的。Unless it _ tomorrow, I _ go to the park _ you.20. 如果她睡過(guò)頭了，就會(huì)旅游遲到的。She;_ the trip if she _.21. 只要他有空，他會(huì)幫助你的。As long as he _ _, he _ _ you.22. 如果 Tom 考試不及格，他就沒(méi)有機(jī)會(huì)上高中了。Tom _ha

10、ve the _to go to the _high school if he _ the exams.23. 你如果抄同學(xué)的作業(yè)就不能學(xué)好各門功課。You _ _ good at every subjects if you _ the other studentshomework.二、單項(xiàng)選擇（15 分）1.If you _ to the party, youa greatll havetime. A. will goB. wentC. goD. going2. It will be a long time _ Peter _ his work.A. since, has finished

11、B. after, finishes C. when, will finish 3. What will fatherbring us,_he comes from China.A. ifD. before, finishes.B.whenC. as long asD.untill學(xué)習(xí)必備歡迎下載4.If wangfang _me,_me at once.A.need,tell B.needs,telling C.need,telling D.needs,tell5 I _ her the answer if she _me.A. can tell, will askB. will tell,

12、 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?-Sorry, I don t know. When he _ back,ellI you. ll tA. comesB. will comeC. comeD.

13、may come8. What will you do if you _ to the old folk s home visit?A. goB. wentC.goingD. will go9. _I eat much food , I ll be very fat.A. AlthoughB. ifC. whileD. because10. I ll not give the book to him_ he will comehere next Sunday.A. ifB. as long asC. thoughD. unless11. There _an English film in our school tomorrow.A. is going to haveB. will haveC. 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 _