英语人教版八年级下册The present perfect tense.ppt

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1、Thepresentperfecttense现在完成时态Speaker：lishengfanpast一般过去时nowfuture现在完成时现在完成时表示的:1.在过去某个时间开始并持续到现在的动作或状态。2.发生在过去却对现在造成影响。一、现在完成时定义have/has+V动词过去分词二、现在完成时的构成助动词否定形式疑问句haven’thasn’tHavesb…?Hassb…?Regularverbs:workworkedworkedlivelivedlivedstudystudiedstudiedstopstoppedstopped动词的过去

2、分词的构成：Irregularverbs:Typeoriginalp.tp.pcutcutcutreadreadreadmeetmetmetkeepkeptkeptspeakspokespokeneatateeatenAAAABBABCwork跟踪练习写出下列动词的过去式及过去分词。leavecomedotakegoeatputleftleftcamecomediddonetooktakenwentgoneateeatenputputworkedworked三、现在完成时的时间状语现在完成时的时间状语常与alreadyyeteverneverju

3、stbeforethesedayssinceforalongtime连用已经常用语肯定句中已经常用语否定句中曾经常用语疑问句中从来没有常用否定句中刚刚以前这些天自从很长一段时间跟踪练习：1.A:______yourbrother_________anewwatch?(buy)B:Notyet.2.A:_______youever_______tothepark?B:Yes,Ihave.(be)3.I______never______ofanythinglikethat.(hear)4.Tom___________inthefactorysince

4、heleftschooltenyearsago.(work)5.He____already______ajob.(find)HasboughtHavebeenhaveheardhasworkedhasfoundFor+时间段Since+时间点Since+时间段+agoHehaskeptthebookfor2weeksHehasstayedheresince5hoursago.Since+从句(过去式)ShehastaughtEnglishsincehecamehere.Hehasstayedheresince5o’clock.四、常与for,si

5、nce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for和since填空:1.Wehaven’tseeneachother______alongtime.2.Hisfatherhasbeeninthefactory______10yearsago.3.Thefilmhasbeenon______20minutes.4.MrGreenhasworkedhere______hecametoChina.5.Hisgrandparentshavebeendead______severalyears.6.It’sfive

6、years_______wemetlasttimeforsinceforsinceforsince跟踪练习：五、比较have/hasbeento/in和have/hasgoneto词组含义搭配have/hasgoneto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/hasbeento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/hasbeenin在某地呆多长时间常与表示一段时间的状语连用since,for,howlong跟踪练习：1.你曾经去过青海湖吗？2.他去了青海湖。

7、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短暂性动词延续性动词arrivehas/havebeenbeginhave/hasbeenonborrowhave/haskeptdiehave/hasbeendeadjoinhave/hasbeeninbuyhave/hashadclosehave/hasbeenclosedleavehave/hasbeenawayfromopenhave/hasbeenopen跟踪练习：1.Thedog______lastnight,Andit________for12hours.(die)2.

8、I________thebookfromherlastweek,AndI________itforseverdays.(borrow)3