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1、 八年级上册 Unit10 If you go to the party,youll have a great time! 用法集萃1 ask sb. to do sth.要求某人做某事 2.give sb. sth.给某人某物 3.tell sb. to do sth.告诉某人做某事 4. tooto do sth.太而不能做某事 5. be afraid to do sth.害怕做某事 6. advise sb. to do sth.劝告某人做某事 7.Its best (not) to do sth.最好（不）做某事 8. need to do sth.需要做某事重点句子1. I thi
2、nk I will take the bus to the party. 我想我将乘公共汽车去参加聚会。2. What will happen if they have the party today? 如果他们今天举行聚会将会发生什么事？3. If you do, you will be late. 如果（你）那样（做） ，你将会迟到。4. Should we ask people to bring food? 我们应该让人们带食物来吗?语法归纳： If引导的条件状语从句在句子中做条件状语的从句称为条件状语从句。可置于句首、句尾，有时还可置于主语和谓语之间。引导条件状语从句的连接词有：if
3、,unless,as/so long as等 1.if引导的条件状语从句 表示在某种条件下某事很可能发生。 If we pay much attention to the earth, well have a better world. 如果我们多关爱地球，就会拥有一个更美好的世界 If it rains tomorrow, what shall we do? 如果明天下雨，我们怎么办？ 注意：if还可以引导虚拟条件句，表示不可实现的条件，从句中多用一般过去时或过去完成时。What would happen if there were no water ?如果没有水会怎样？2.unless引导
4、的条件状语从句unless的意思是如果不，除非。可与if.not互换。You will fail in English unless you work hard.你英语考试会不及格的，除非你更加努力。3.as /so long as引导的条件状语从句 as /so long as意思是“只要”So long as youre happy,i will be happy.只要你高兴，我就高兴。4.once引导的条件状语从句once引导的条件状语从句，意为“一旦.，就”，从句可置于主句前或后Once you begin,never stop.一旦开始，就绝不要停止Maths is easy to
5、learn once you understand the rules.一旦你理解了规则，数学就不难学了。提示：在条件状语从句中，用一般现在时代替一般将来时，用一般过去时代替过去将来时。If the weather is bad next week, well put off the climbing.如果下周天气不好，我们将推迟爬山。Father told me if i worked hard he would buy me a gift.爸爸告诉我，如果我努力学习，他会给我买一份礼物。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
6、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： We can walk there if we cant find a bus . If it rains tomorrow ,we will not go to the zoo. 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。如： I
7、f 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巩固练习一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 E
8、ducation (will agree/ agree/agrees) soon.3. If there (will be/ are/is) a car accident, they (will call/call/calls) 110 for help at once.4. If it (wont/dont/doesnt/ isnt) 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 f
9、or the alien.6. If he (will have/have/has) money, he (will bulid/build/builds) a science lab.7.Dont wait for me if I (am/ will be) late.8.They (wont/dont) 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)
10、you know if he (will need/ need/ needs) help.11. (Will / Do/ Does) he visit the museum if he (wont / dont/ doesnt) get tired?12. Where (will/ do/does) they live if they (will miss/ miss/ misses) the bus?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
11、 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
12、) 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 _(writ
13、e) 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.三单项选择1.If you _ to the party, youll have a great time. A. will go B. went C. go D. going2. It
14、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. A. for B. to C. on D. with5 I _ her the answer if she _me. A. can tell, will ask B. will tell, will ask C.
