1、中考英语复习Unit 6 Grade 8语法梳理一、动词不定式的用法。二、时间状语从句。三、条件状语从句。动词不定式的用法不定式结构1.带to的不定式结构:want,ask,tell,hope,learn,try,decide,forget,remember,like,love,stop,go,come2.不带to的不定式结构:1).had better(not)do2).在let,make,see,feel,watch,hear等感官或使役动词后,要跟不带to的动词不定式作宾语补足语3).Why not do sth 4).不定式动词在介词but,except,besides后面时,如这些介
2、词前有实义动词do的各种形式,则后接不带to的不定式,否则带to。动词不定式的用法2.宾语1.主语4.定语不定式的用法例:To live is to work.例:I wish to be a college student.3.表语5.状语6.补语例:My main job is to study.例:I have some food to eat.例:He got up early to catch the early bus.例:He asked me to talk about English study.不定式的时态不定式常用的时态有一般时、完成时、进行时和完成进行时四种,常用的为前
3、三种。1)一般式表示不定式的动作或状态与谓语动词所表示的动作同时发生或在之后发生。I plan to attend the meeting.2)完成式表示不定式的动作发生在谓语动词表示的动作之前。3)进行式表示不定式的动作与谓语动词所表示的动作同时发生。I am sorry to have kept you waiting.They are said to be working hard.to doto have doneto be doing时间状语从句由when,while,as,as soon as,after,before,since,Untill,till 等引导的时间状语从句。区别
4、whenwhile进行时+when+一般时一般时+while+进行时进行时+while+进行时由till或until引导的时间状语从句till和until一般情况下两者可以互换,但是在强调句型中多用until。并且要注意的是:如果主句中的谓语动词是瞬时动词时,必须用否定形式;如果主句中的谓语动词是延续性动词时,用肯定或否定形式都可以,但表达的意思不同。till不可以用在句首,而until可以放在句首。区别I worked until he came back.I didnt work until he came back.他回来我这才开始工作。我工作到他回来为止。条件状语从句引导条件状语从句的
5、连接词主要有:if(如果)、unless=ifnot(除非)、as long as(只要)等。时态1.“主将从现”3.如果主句含有情态动词,从句一般也用一般现在时。I will come to see you if I am free.2.如果主句是祈使句,从句也常用一般现在时。主句从句考点剖析We will stay at home if my aunt _ to visit us tomorrow.A.come B.comes B.C.will come D.is comingDo you know if he _ to play basketball with us?I think he will come if he _ free tomorrow.A.comes;is B.comes;will be C.will come;is D.will come;will be答案为B答案为Cproject1.Tell about a traffic accident you have seen.2.Talk about the traffic rules you know.3.Discuss how to avoid traffic accidents and then write a report.