外研八下Module5if用法.ppt

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1、If 引导的条件状语从句的复习,1 If I _(not understand）,I will ask my teacher for help.If I _(copy)your homework,I will cheat myself.3 If she _(not get)up early,shell miss the early bus.4 If your mother_(buy)the book for you,it will be good for your study.,dont understand,copy,doesnt get,buys,5.If you _(not work)h

2、ard,you _(not pass)the exam.6.If she _(mend)the computer,her father _(not blame).7.If your brother _(break)the window,he will feel very sorry for that.8.If the computer(not work),mend it please.,dont work,will not,mends,will not,breaks,doesnt work,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 sh

3、e can come to the meeting?2.She will not go there,if it is rainy tomorrow.3.I cant guess if she will be angry.4.If we help each other,we both will get good results.,，,，,if 引导的条件状语从句和if 引导的宾语从句的区分:,If 在宾语从句中翻译为“是否”If 在条件状语从句中翻译为“如果”,Ill go to see you if I am free next week.,I want to know if he is a

4、teacher.,whether,1.if 在句中的含义不同,2.if 在从句中的位置不同,If 引导的宾语从句放在主句之后；而if引导的状语从句可放在主句之前也可放在主句之后,=If it doesnt rain,I will go out tomorrow.,I will go out tomorrow if it doesnt rain.,I dont know if the train has arrived.,3.时态的区别,If 引导的宾语从句的时态由主句时态定；If 引导条件状语从句的时态为一般现在时，主句为一般将来时-“主将从现”,I want to know if there

5、 a sports meeting next month.If it,well hold it.,doesnt rain,will be,4.标点不同,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。,1.If she _(not be)interested in math,she will find it very boring.2.If you _(get)high scores,your parents will be proud of you.3.If you _(be)happy,we will be happy.4.If she(translate)the sentence word by word,she _(get)its true meaning.,isnt,get,are,translates,will get,练一练：,