1、Grammar:现在完成时1.定 义动作发生在过去，对现在造成一定的影响。2.结构主+have/has+V.过去分词+其它3.V.过分规则变化：与过去式变化相同不规则变化：见附录4.标志词1.already(肯)助动词之后，过分之前3.just(否疑句)句尾2.yet 助动词之后，过分之前2.结 构主语+has/have(助动词)+done+其他。1.定 义表示回忆过去的某种经历。Grammar:现 在 完 成 时(二)3.时 标never,ever,before,次数 等。4.短 语 have been to(去而已归)去过have gone to(去而未归)去了 常与“ever,never
2、,before,次数连用 常与“where.,not here等连用5.注意 当have been to/have gone to+地点副词(here,there)时,介词to要去掉。N:_ have you lived here?I:Ive lived here _.N:Twenty years!Thats a long time.I:Yes,Ive been here _.How longfor twenty years since 197619761996live20 yearsGrammar 现在完成时1.定义3：表动作发生在过去，并一直持续到现在且可能持续下去 （未完待续）N:How
3、 long have you lived here?I:Ive lived here _.N:Twenty years!Thats a long time.I:Yes,I have been here _.19761996live20 yearsfor twenty years.since 19761.for+时间段2.since+时间点(过去)明确时间点（1976）时间段+ago(twenty years ago)一般过去时句子=since twenty years ago现完时标(放句尾)sincetwo days twenty minutes three years ago last s
4、ummer many years 4 oclock yesterday She left here.for口头练习：five hours eight months How long have they cried?They have cried for _.They have cried since _.They have cried since _.10 a.m12a.m.cry2 hours3.情景转移two hours10 oclockthe babys mother left可持续Dec.Sep.cookHe became a cook._ has he cooked?He has c
5、ooked _.He has cooked _.He has cooked _.for three monthssince Septembersince he became a cookHow long可持续介词 for 和 since 的区别典例：I have taught English _ more than 20 years.She has worked here _ five years ago.It is two months _ he went to England.His grandpa has been dead _ two years.Tom has painted _ y
6、esterday.forsincesincesinceforThey have cried for two hours.He has cooked since september.He has learnt baseball since he was a boy.现在完成时延续性动词for/since.总结：在肯定句中与since、for 连用的必须为延续性动词；buylearn瞬间性动词延续性动词liveleave四、瞬间v.转换为延续性v.瞬间动词延续性buyhaveHe bought these books yesterday.bought不可延续 可 延 续haveDec.21Dec.
7、22He has bought these books for one day.has had四、瞬间v.转换为延续性v.buyborrowcome/go/becomecatch a coldhave hadhave kepthave beenhave had a cold常用瞬v.延续v转换为Grammar:现在完成时（三）1.定义：表动作发生在过去,并一直持续到现在且可能持续下去。3.标志词：since+时间点（过去的时间或句子）for+时间段2.结构：主语+have/has+V过分4、瞬间v.转换为延续性v.或状态词。注意：与since，for连用的动词必须是延续性动词。一、选用一、选用
8、since或或for填空。填空。1.We have learned English _ Grade Three in primary school.We have learned English _ five years.2.He hasnt felt well _ last night.Has he seen the doctor?sinceforsince3.I have read this story book _ three days ago.I havent finished reading it yet.4.It has snowed _ two days.Everything i
9、s covered with snow.5.We have cleaned the classroom _ half an hour.6.We have studied at this school _ 2003.sinceforforsincebe covered with be covered with 被被覆盖覆盖finish doing sth.finish doing sth.完成某事完成某事练习四、单项选择()I _ at this school for two years.A.am studying B.study C.studied D.have studied()2.We h
10、ave been friends since _.A.before five years B.five years C.five years ago D.five years beforeDC 二、精挑细选。()3.The old man got sick last April and _ in bed since then.A.Was B.had been C.has been D.would be()4.-Do you know Mary well?-Yes,she and I _friends since we met in London last summer.A.have make
11、B.were C.have been D.becomeC C()5.This film is worth _.A.see B.to see C.saw D.seeing()6.How time flies!Its been nearly two years _we came to this school.A.when B.since C.for D.beforeDB()7._ have you studied English?A.WhenB.What C.WhereD.How long()8.I have been here 1985.A.in B.for C.since D.aboutDC三
12、、慧眼识错（写出正确的句子）。1.I have gone to Beijing last year._ 2.They havent already come back._ 3.She has lost her bike two years ago._ 4.We have lived here for 1985._ 5.My brother has finished his homework yet._ My brother has already finished his homework.I went to Beijing last year.They havent come back ye
13、t.She lost her bike two years ago.We have lived here since 1985.四、用所给词的适当形式填空。1._ you _(find)your science book yet?2.She _(live)here ever since she was ten.3.Half an hour _(pass)since the train _(leave).4.Mary_(lose)her pen._ you _(see)it here and there?5.-Are you thirsty?-No,I _ just _(have)some or
14、ange.Havefoundlefthas passedhas livedlostHaveseenhavehad6._ they _(build)a new school in the village?7.I _(not finish)my homework.Can you help me?8.My father _(read)the novel twice.9.So far I _(make)quite a few friends here.10.I _ already _(see)the film.I _ (see)it last week.Havebuilthavent finishedhas readhave madehaveseensaw
