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1、The present perfect tense 现现 在在 完完 成成 时时 态态 Speaker：lishengfanpast一般过去时一般过去时 now future 现在完成时现在完成时现在完成时表示的现在完成时表示的:1.在过去某个时间开始并持续到现在的动作在过去某个时间开始并持续到现在的动作或状态。或状态。2.发生在过去却对现在造成影响发生在过去却对现在造成影响。一、现在完成时定义一、现在完成时定义have/has+V动词过去分词动词过去分词二、现在完成时的构成二、现在完成时的构成助动词助动词 否否 定定 形形 式式疑疑问问句句 havent hasnt Have sb?Has
2、sb?Regular verbs:work worked workedlive lived livedstudy studied studied stop stopped stopped动词的过去分词的构成：Irregular verbs:Typeoriginal p.t p.pcutcutcutreadreadreadmeetmetmetkeepkeptkeptspeakspokespokeneatateeaten AAAABBABC work跟踪练习写出下列动词的过去式及过去分词。leave come do take goeatput left left came come did don
3、e took takenwent gone ate eaten put putworked worked三、现在完成时的三、现在完成时的时间状语时间状语 现现在在完完成成时时的的时时间间状状语语常常与与already already yet yet ever evernevernever just justbeforebeforethese daysthese dayssincesince for a long timefor a long time连连用用已经已经 常用语肯定句中常用语肯定句中已经已经 常用语否定句中常用语否定句中曾经曾经 常用语疑问句中常用语疑问句中从来没有从来没有 常用否
4、定句中常用否定句中 刚刚刚刚 以前以前 这些天这些天自从自从 很长一段时间很长一段时间跟踪练习：跟踪练习：1.A:_ your brother _ a new watch?(buy)B:Not yet.2.A:_ you ever _ to the park?B:Yes,I have.(be)3.I _ never _ of anything like that.(hear)4.Tom _ in the factory since he left school ten years ago.(work)5.He _ already _ a job.(find)Has boughtHave bee
5、n have heardhas workedhas foundFor+时间段时间段Since+时间点时间点Since+时间段时间段+agoHe has kept the book for 2weeksHe has stayed here since 5hours ago.Since+从句从句(过去式过去式)She has taught English since he came here.He has stayed here since 5 oclock.四、常与四、常与for,since引导的时间短语或从句连用。引导的时间短语或从句连用。For+时间段Since+时间点。Since+句子选用
6、选用for和和since填空填空:1.We havent seen each other _ a long time.2.His father has been in the factory _ 10 years ago.3.The film has been on _ 20 minutes.4.Mr Green has worked here _ he came to China.5.His grandparents have been dead _ several years.6.Its five years _ we met last timeforsinceforsinceforsin
7、ce跟踪练习：跟踪练习：五、比较have/has been to/in和have/has gone to词组含义搭配 have/has gone to到某地去了，表示到了某地或正在去某地的途中。说话时该人不在现场 have/has been to曾经去过某地，现在已经不在那里了。常与表示时间的状语just,ever,never 连用 have/has been in在某地呆多长时间 常与表示一段时间的状语连用since,for,how long 跟踪练习：1.你曾经去过青海湖吗？2.他去了青海湖。3.我们在青海住了五年。六、现在完成时短暂性动词对应的延续性动词六、现在完成时短暂性动词对应的延续
8、性动词 短暂性动词短暂性动词 延续性动词延续性动词 arrive has/have beenbeginhave/has been onborrowhave/has keptdiehave/has been deadjoinhave/has been in buyhave/has had closehave/has been closedleavehave/has been away fromopenhave/has been open跟踪练习：跟踪练习：1.The dog _last night,And it _for 12 hours.(die)2.I _ the book from her last week,And I _it for sever days.(borrow)3.He _the watch since two weeks ago.He _ it with his wife at that time.(buy)diedhas been dead borrowedhave kepthave hadbought比较过去式和现在完成时有什么不同？1.定义的不同。2.时间状语的不同。3.谓语动词不同。跟踪练习：See you!