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1、Welcome to our class,-现在完成时态,语法练习课,时态,不同时间发生的动作，动词要用不同形式,已学习过的时态,1.v原形 2.v三单,am/is/are+v-ing,1.will/shall+v原形2.am/is/are going to+v原形,1.v-ed（规则动词）2.不规则动词,was/were+v-ing,判断下列句子的时态,1.She works in a factory.2.I was doing my homework at this time yesterday.3.We are going to have a picnic this Sunday.4.T
2、hey held a sports meeting last week.5.Are you helping your mother.,一般现在时,过去进行时,一般将来时,一般过去时,现在进行时,现在完成时,1.过去发生的动作对现在造成的影响或结果。,2.过去已经开始，持续到现在的动作或状态,动词构成：have/has+v过去分词,had breakfast,I have just had my breakfast.,(现在我不饿),Im not hungry now,moved herein 2000,I still live here,I have lived here for three
3、years.,I have lived here since 2000/three years ago.,now,现在完成时动词构成:have/has+v 过去分词,助动词,否定,haventhasnt,疑问,Have you?Has he?,动词的过去分词形式,1.规则动词2.不规则动词,finish-finished-finishedlive-lived-livedcarry-carried-carriedstopstopped-stopped,Eg.,gowentgonesee-sawseenforgetforgot-forgotten,I,finish,homework,I haven
4、t finished my homework.,Have you finished your homework?Yes,I have./No,I havent.,I have finished my homework.,1.她成为一名护士已经三年了。2.我五年前就认识李雷了。3.那些相片我已经寄给他了。（post）4.我来到这个学校后，他就一直教我。5.我刚丢了我的历史书。,She has been a nurse for three years.,I have known Lilei since five years ago.,I have already posted the photos
5、 to him.,He has taught me since I came to the school.,I have just lost my history book.,(1).for+表示一段时间的短语(2).since+表示过去时间点的词语(3).since+表示过去时间的时间状语从句,eg.I have been a teacher _ a year.He has been at this school _ 1992.We have learned 1,000 English words _ we came to this school.,for,since,since,B.jus
6、t,already,yet,before/ever,never 有此类副词时,常强调动作完成,不强调动作的持续.,eg.Have you _been to Japan?I have _ finished my homework.I have finished my homework _.I havent finished my homework _.,ever,just,already,yet,1.现在完成时句中常见的时间A.表示从过去一直持续到现在,不能是具体过去时间,2.区分短暂性动词与持续性动词.表示短暂性(瞬间性)的动词在现在完成时的句中不能和一段时间连用.即for,since短语或h
7、ow long问句,come/arrivego out leavebeginbuyborrowjoindiecatch a cold,be at/in,be out,be away(from),be on,have,keep,be a member of,be dead,have a cold,改错:,How long have you become a league member？For more than one year.Have you arrived here since last night.Yes，youre right.The dog has died for a month.He has gone to Shanghai twice.How long have been at this school?Since two years.,been,been,been dead,been,ago.,For,Thank you Bye-bye!,
