If引导的条件状语从句_百度文库(精)

1、If引导的条件状语从句潘店镇中学语芒 川引导的条件状语从句例句：If people obey the traffic rules,-从句there will be fewer accidents主句if：从属连词，意思是：“如果，假如，倘若”原句可改为:There will be fewer ifpeople obey the-结构：也可以放在句子后从句位于主句之前时，例句：If people obey the traffic rules,there will be fewer accidents.时态严主将从现”if引导的条件状语从句，主句用一般将来时（will），从句用一般现在时。T 主句

2、谓语中也可以含有情态动词，如：must,can,could,should等占例句：如果交通指示灯是红的，你必须 eg:lf the trafficlights are red,you musst主句谓语中也可以用had better（0Ot例句：如果你想减肥，你最好锻就兰 eg:If you want to loseweightyou haTtieexercise.if的反义词:if.not.=unless,意思是： “如果不， 除非”I won t go there unless I hear from you.（同义if句）don9tI won t go there_ I_ hear fr

3、om you.I won t go to the party if I am not invited（同义句）unlessI won t go to the partyan（变换:1有if引导的条件状语从句的复合句中，当主句和从句的主语均为you时，可转换为“祈使句，and+简单句”或“祈使句，o”简单句”You can pass the exam if you workhard.If you dont hurry up,you will2.借助介词with或without来转换。 例如：If you help me, P II finish my job soon.Wurher| finis

4、h my job soon.如果你帮我，我将很快完成我的工作。If there is no water, fish may die.without waterFish may die -如果没有水，鱼可能会死。WorkHurry up,- you注意事项例如：IMI help you with your English if I am freetomorrow.果唄夫我有空，莪会稱你孕英 语Q 2注if引导的条件状语从句中不能够使用some,而要用any。例如If you have any questions to ask, please come tomy office 如果你有问题要问的

5、岳，请到我办公室乗。就引导的条件状语从句和咛引导的 宾语以句的区分:：If在宾语从句中翻译为“是否”Pll go to see you if I am free next week.If在条件状语从句中翻译为“如果”聚騁，幣加谿聶willoI want to knowhe is a teacher.whethI donJt know if the train has arrived.I will go out tomorrow if it doesnt rain. If itdoesnt rain, I will go out tomorrow.If引导的宾语从句放在主句之后；而if弓I导的状

6、语从句可放在主句之前也可放在主 句之后If引导的条件状语从句放于句首时多用逗号隔开;而if引导的宾语从句则不能。找出下列句子中哪些是if条件状语从句. 哪些是if宾语从句1. Can you tell me if she can come to themeeting ?tomorrow.3.1 cant guess if she will be angry .2 Shgoth4. If we help each other3we both will getgood results .1want to know if there_asports meeting next month.If引导的宾

7、语从句的时态由主句及本身时态决定;2f it_, well hold itIf引导条件状语从句的时态为一般现在时记住“主将从现”If引导的条件状语从句的练习1 If Idoift understand(not understand ), I willask my teacher for help 2 If I_ (copy ) your homework ,I will cheat myself 3 If she_ (not get) upearly5shell miss the early bus .4 If your motherbuys(buy) the bookfor you , it

8、 will be good for your study.5. If you_ (not work ) hard ,you_(not pass) the exam.6. If shemends(mend) the computer , herfather won WbS (not blame ).7. If your brother_(break) thewindow , he will feel very sorry for that 8. If the computer z i_ (not work),mend it please 9. If shefSn i(not be) intere

9、sted in math, shewill find it very boring 10.If you_ (get) high scores,your parents will be proud of you 11.If you_ (be) happy , we willbe happy 12.If she_(translate ) thesentence word by word , she_ (get)its true meaning hlfyou_to the party, youll have a greattime.A. will go B. went C go D. going2.I_ her the answer if she_me A.can tell, will ask B. will tell, will askC. would tell, ask D. will tell, asks3.一What are you going to do tomorrow?-Well go to the library tomorrow i