(完整)初中英语初一if条件句.doc
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1、第五讲 if条件句姓名: 学校: 年级: 【学习目标】: 1. 了解if条件句,及其用法 2. 通过读写训练,掌握if条件句的用法【知识要点】定义:常见的if条件状语从句表示在某条件下,某事很可能发生,条件是可能存在的,主句中某种情况发生的概率也是很高的。 E.g. If you ask him,he will help you如果你请他帮忙,他会帮你的。 E.g. If you fail in the exam,you will let him down如果你考试不及格,你会让他失望的。 E.g. If you have finished the homework, you can go h
2、ome如果你作业做完了就可以回家了。 另外,if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设。从句多用一般过去时或过去完成时,表示对现在或过去的一种假设。E.g.If I were you,I would invite him to the party如果我是你,我会邀请他参加聚会。 E.g.I would have arrived much earlier if I had not been caught in the traffic要不是交通堵塞,我本会来得早一些。另外你还要注意if 条件句的时态搭配1if从句用一般现在时,主句用一般将来时 E.g. If h
3、e runs hell get there in time. 如果他用跑的,他就会及时赶到那儿。E.g. The cat will scratch you if you pull her tail. 如果你拉猫的尾巴,它就会抓你。2if从句用一般现在时,主句用may/might/canE.g. If the fog gets thicker the plane may/might be diverted. 如果雾在大一些,飞机可能就会改在别的机场降落。E.g. If it stops snowing we can go out. 如果雪停了,我们就可以出去。3if从句用一般现在时,主句用mus
4、t/shouldE.g. If you want to lose weight you must/should eat less bread. 如果你想减肥,你必须少吃面包。4if从句用一般现在时,主句用一般现在时E.g. If you heat ice it turns to water. (也可用will turn)如果把冰加热,它就会化成水。5if从句用现在进行时,主句用一般将来时E.g. If you are looking for Peter youll find him upstairs. 如果你是在找彼得,上楼就会找到他。6if从句用现在完成时,主句用一般将来时E.g. If y
5、ou have finished dinner Ill ask the waiter for the bill. 如果你吃完了,我就叫服务生来算账注意 :学习 if 引导的条件状语从句的用法,现在总结一下: if 条件句不一般,几个要点记心间; 条件句,放在前,逗号要放句中间。 条件句表可能,主句多用将来时; 条件句表事实,主句常用现在时。在 if 引导的条件状语从句中,如果从句谈论的是一个有可能发生的事实及其产生的相关的结果,主句用一般将来时态,从句用一般现在时态。如: E.g. We can walk there if we cant find a bus . E.g. If it rai
6、ns tomorrow ,we will not go to the zoo. E.g. What will you do if you find a panda in danger.如果 if 条件句谈论的是重复发生和预示要发生的情景和事件,则主从句大多用一般现在时态。 E.g. If bears are in danger ,they attack people.在 if 引导的条件状语从句中,if 和条件句位置灵活,可直接放在主句后面,若 if 条件句放句首, 从句后面要加逗号,和主句隔开。还要注意前后时态一致原则【经典练习】一.单项选择( )1. If you _ to the par
7、ty, youll have a great time. A. will go B. went C. go D. going( )2. It will be a long time _ Peter _ his work. A.since, has finished B. after, finishes C. when, will finish D. before, finishes.( )3. What will father _ us from Japan? A. take B. bring C. carry D. make ( )4. Weifang is famous _ kites.
8、A. for B. to C. on D. with( )5 I _ her the answer if she _me. A. can tell, will ask B. will tell, will ask C. would tell, ask D. will tell, asks( )6. 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 rain( )7.Do you know when he
9、will come back tomorrow? -Sorry, I dont know. When he _ back, Ill tell you. A. comes B. will come C. come D. may come ( )8. What will you do if you _ to the old folks home visit? A. go B. went C.going D. will go( )9. If I eat _ food, Ill be very fat. A. too many B. many too C. too much D. much too(
10、)10. Ill give the book to him if he _ here next Sunday. A. will come B. comes C. is coming D. came( )11. There _an English film in our school tomorrow. A. is going to have B. will have C. is going to be D. has( )12. Could you tell us where _? A. will the next Olympic Games held B. the next Olympic G
11、ames will be held C. would the next Olympic Games be held D. the next Olympic Games would be held1-5 CDBAD 6-12 DAACBCB二在正确的答案下划一条线。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 Educa
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