现在完成时讲解(1).ppt

1、-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.They held a spo

2、rts 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 here in 2000,I still live here,I have lived here for three years.,I ha

3、ve 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,havent hasnt,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-finished live-lived-lived carry-carried-carried stopstopped-stopped,Eg.,gowentgone see-sawseen forgetforgot-forgotten,I, finish, homework,I h

4、avent 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

5、 posted the photos 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 scho

6、ol.,for,since,since,B. just, 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)

7、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how long问句,come/arrive go out leave begin buy borrow join die catch 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