2021年中考英语复习 if条件状语从句ppt课件.ppt

1、If youre happy and you know it,clap your handsIf youre happy and you know it,clap your handsIf youre happy and you know itAnd your face want to really show itIf youre happy and you know it,clap your handsIf youre happy and you know it,stomp your feetIf youre happy and you know it,stomp your feetIf y

2、oure happy and you know itAnd your face really show itIf youre happy and you know it,stomp your feetIf you are happy and know itIf 引导的条件状语从句引导的条件状语从句 if“如果、假如”，它引导的句子表示某事发生所需的条件，是主句动作发生的前提或条件，在句子中充当状语，因此称之为条件状语从句。中考对条件状语从句的考查点 中考对状语从句的考查，多见于单项选择及完形填空，一般集中考查两个方面：一是选择条件状语从句的连词；二是考查从句、主从句中的时态;三是考查if引导的

3、宾语从句和状语从句的区别。If you wonder off too far,my love will get you home.if clause从句从句main clause主句主句 1.If it rains tomorrow，we wont go to the zoo.2.I will go to his birthday party if he invites me.if clause从句从句main clause主句主句从句从句主句主句从句从句主句主句从句在主句前时，从句在主句前时，_ （用（用/不用）逗号隔开不用）逗号隔开当从句在主句后时，则当从句在主句后时，则_（用（用/不用）

4、逗号不用）逗号不用用条件状语从句的引导词条件状语从句的引导词 if 如果 eg:If it rains,we will stay at home.unless 除非 如果不,相当于（if.not.）eg:You wont pass the exam unless you work hard.as long as 只要.就.eg:As long as you get up early,you will catch the bus.练习一练习一1.You wont make progress _ you try your best.A.when B.unless C.because D.as so

5、on as2._ you go to the party,youll have a good time.A.If B.Although C.Unless D.Maybe3.Alice,_you see your brother,ask him to call me back.A.so B.before C.if D.because4.We cant do well in examinations _we study hard.A.if B.andC.sinceD.unlessBADC结构一结构一 读下列例句，总结读下列例句，总结if if 的用法：的用法：1.1.If youIf you ge

6、t get up late,you up late,you willwill be late for be late for school.school.2.2.If IIf I havehave a lot of money,I a lot of money,I willwill buy a buy a big house.big house.主将从现主将从现 主句是一般将来时,（注意：将来时态通常用will do,不用be going to的形式）从句用一般现在时。If I have a lot of money,I.a lot of money结构二结构二 读下列例句，总结读下列例句，总

7、结if if 的用法：的用法：1.We can go out if it stops raining.2.If she wants to get good grades,she should study hard.主情从现主情从现 主语含有情态动词can/could/must/should/may/might等时，从句用一般现在时。If I am free,I can/may.结构三 读下列例句，总结读下列例句，总结if if 的用法：的用法：1.If you want to be a writer,read more books.2.See a doctor if you have a co

8、ld.主句是祈使句，从句是一般现来时。主主祈祈从现从现 If you want to lose weight,.junk fooddo exercises 读下列例句，总结读下列例句，总结if if 的用法：的用法：If you drop a glass,it breaks.If you stand in the rain,you get wet.如果描述的是客观事实或普遍真理，则主句、从句都用一般现在时主现从现主现从现结构四()1.If it _ sunny tomorrow,I _ boating.A.is,go B.will be,go C.is,will go D.will be,wi

9、ll go()2.-what will you do if it _ tomorrow,-Ill stay at home and watch TV.A.rain B.rains C.will rain D.is raining()3.If he _,I _ him the time.A.comes,tell B.will come,will tellC.comes,will tell D.will come,tell()4.If it _,it _cold.A.snows,will be B.snows,isC.will snow,will be D.will snow,isCB CB 1.

10、如果 If 引导的条件状语从句主句从句主语都是you,可以转换成 祈使句+and/or+简单句 and 表顺承“那么”or 表转折“否则”If you study hard,you will pass the exam.If you dont hurry up,you will be late.几个重要的同义词转换 Study hard,and you will pass the exam.Hurry up,or you will be late.2.借助with和without If you help me,I will finish my job soon.If there is no w

11、ater,fish may die.3.unless与if.not.转换 We will go for a picnic unless it rains tomorrow.With your help,I will finish my job soon.Without water,fish may die.We will go for a picnic if it doesnt rain tomorrow.几个重要的同义词转换If 引导的条件状语从句与If引导的宾语从句的区别含义含义位置位置时态时态If 引导的条件状语从句If引导的宾语从句如果是否即可在主句前，又可在主句后主将从现主情从现主祈

12、从现主现从现只能在主句后主现从任主过从过主任从现辨析1、I want to know if he is a teacher.2、If I m free,I will go shopping with my friends.3、Can you tell me if she will come to the meeting tomorrow?4、I wonder if it will rain tomorrow.5、Hurry up,if you dont want to be late.宾语从句状语从句宾语从句宾语从句状语从句If 条件状语从句中,时态变化规则遵循：主将从现 主情从现 主祈从现 主现从现Summary