《组现在完成时》PPT课件.ppt

《《组现在完成时》PPT课件.ppt》由会员分享，可在线阅读，更多相关《《组现在完成时》PPT课件.ppt（27页珍藏版）》请在三一办公上搜索。

1、现在完成时,The Present Perfect Tense,一)构成:,have/has+动词过去分词,1.already在现在完成时中的用法,肯定句:句中(助后实前)/句末“己经”,一般疑问句:句末(表示惊讶的语气)“难道”,Eg.Ive already had breakfast.(更常见)=Ive had breakfast already.(表示强调)Have you had breakfast already?,二)含义:,(一)表示过去发生的动作或事情对现在的影响和产生的结果.它强调的是过去的动作同现在的联系.常用的时间状语有already,yet,ever,never,jus

2、t,before等.,注:有already的句子在时态上并不都是现在完成时,判断时要看该词后是否有动词的过去分词.Eg.Shes already eighty years old.It was already very late.,2.yet在现在完成时中的用法,否定句:句末“还(没)”,疑问句:句末“己经”,Eg.I havent had breakfast yet.Have you had breakfast yet?,注:带already的肯定句变成否定句或疑问句时,将already要变成yet放在句末.,Eg.I have already done my homework.否定句:一般

3、疑问句:,I havent done my homework yet.,Have you done your homework yet?,3.ever在现在完成时中的用法,肯定句/疑问句:句中“曾经”,Eg.Ive ever been to Beijing.Have you ever been to Beijing?,4.never在现在完成时中的用法,否定句:句中“从来没有”Eg.Ive never been to Beijing.,注:带ever的肯定句变否定句时,要将never变成ever;带ever的一般疑问句作否定回答时可用“No,never.”,Eg.He has ever mad

4、e dumplings.否定句:,Have they ever travelled by train?No,never.,He has never made dumplings.,5.just在现在完成时中的用法,用于句中,表示“刚刚”Eg.Ive just had breakfast.What have they just done?,6.before在现在完成时中的用法,用于句末,表示“以前”Eg.Ive seen it before.Has she ridden a bike before?,(二)表示一个从过去开始,一直持续到现在,有可能继续下去的动作或状态.通常和for或since引

5、导的时间状语连用.,1.for+,Eg.I have been here for 5 weeks.Hes studied English for 3 years.,一段时间,2.since+,从句(一般过去时),单词,词组,(表示过去某一时间的)时间点,Eg.I have been here since 2000.I have been here since 5 years ago.I have been here since I graduated in 2000.,注1):since 也可单独使用,表示“自那时起”;另外since前也可加上ever,以加强语气.Eg.I have been

6、 here(ever)since.I have been here(ever)since I graduated in 2000.,注2):对for或since引导的时间状语提问 必须用how long,决不能用when.,Eg.I have lived here for 10 years.,How long have you lived here?,She has stood here since 2 hour ago.,How long has she stood here?,注3):短暂性动词不能和for或since引导的时间状语连用,当然也不能用于how long引导的问句中.Eg.(

7、误)I have left there for 5 years.,(正)I have been away there for 5 years.,短暂性动词与延续动词间的转换,leave-come/go(to)-arrive(at/in)-get(to)-reach-buy-borrow-finish-,join-start/begin-die-close-open-return-marry-become-,be away(from),be(in/at),be(in/at),be(in/at),be(in/at),have,keep,be over,be in/be a/an,be on,be

8、dead,be closed,be open,be back,be married,be,三)have/has gone to和have/has been to的区别,have/has gone to:表示某人已经去了某地现在还没回来,可能现在正在某地或者正在去那里或回来的路上.have/has been to:表示某人曾经去过某地,但现在己经不在某地.,四)It is+一段时间+since+句子(一般过去时)=一段时间+has passed+since+句子(一般过去时),Eg.It is five years since I joined the army.=Five years has

9、passed since I joined the army.,用动词的适当形式填空（注意时态）,1.-_ you _your pen?(mend)-Yes,I _.-When_ you _ it?-I _ it yesterday.2.-How do you like the film?-I _(not see)such a moving film before.3.Millies sister _(join)the club last week.So she _(be)in the club for nearly one week.,Have,mended,have,did,mend,me

10、nded,havent seen,joined,has been,4.My father_(give)up _(smoke).He doesnt _(smoke)now.5.The Green family_(not come)back yet from the cinema.They_(go)to see a film one hour ago.6.You_(not visit)your son for a long time.,has given,smoking,smoke,havent come,went,havent visited,6.She has known Sam_ nine

11、years.(for,never,since)7.They have_arrived.(ever,just,yet)8.Have you_ ridden a horse?(ever,for,yet)9.She has known Fred_ they were at primary school.(already,just,since)10.We have not completed the project_.(already,for,yet),for,just,ever,since,yet,辨别下面句子的时态,1.去年我去了苏州。2.我每天早上7：00起床。3.下个星期我要去看望我的老师。4.看！那边有个女孩在哭。5.汤姆去过北京2次了。6.他住在那儿已经有十年了。,一般过去时,一般现在时,一般将来时,现在进行时,现在完成时,现在完成时,Thank you!,