现在完成时态专题.ppt

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1、**现在完成时**米芾中学杨应先不规则变化：am/is-was-beenare-were-beenbegin-began-begunbreak-broke-brokendo-did-donedraw-drew-drawndrink-drank-drunkdrive-drove-driveneat-ate-eatenfall-fell-fallenfly-flew-flownforget-forgot-forgottengive-gave-givengo-went-gonegrow-grew-grownhide-hid-hiddenknow-

2、knew-knownlie-lay-lainride-rode-riddenring-rang-rungshow-showed-shownsee-saw-seensing-sang-sungspeak-spoke-spokentake-took-takencome-came-comerun-ran–runbecome-became-become1现在完成时的主要用法及常用时间状语a表示过去发生或已经完成的某一动作对现在产生的影响或结果，常与already、never、ever、just、yet等时间状语连用。Thenmakeyourowns

3、entenceslikethis:eg：Ihavealreadydonemyexercise.b表示过去已经开始，持续到现在的动作或状态，可以和表示过去某一时刻延续到现在（含“现在”）的一段时间的状语。如：today、thesedays、fortwoyears、since1984、sincehecamehere等连用。2巧记现在完成时的用法学习现在完成时，谓语结构要记住——“have/has+过去分词”主要用法有两个：过去发生的动作对现在产生的影响或结果，just，already常用着，过去动作或状态，一直延续到现在，for和since把时

4、间带。如：IhaveknownLileiforthreeyears.现在完成时/ThePresentPerfectTensePutthefollowingsentencesintoEnglish.A:火车已经开走了.B:什么时候开走的?A:半个小时之前开走的.A:这本书我已经买了两年了.B:你在哪儿买的?A:在我老家买的.A:你看过这部电影吗?B:看过.A:什么时候看的.B:上周星期天看的.A:Thetrainhasleft.B:Whendiditleave.A:Itlefthalfanhourago.A:haveyouseenthefil

5、m?B:Yes,Ihave.A:Whendidyouseeit?B:IsawitlastSunday.A:I`vehadthebookfortwoyears.B:Wheredidyoubuyit?A:Iboughtitinmyhometown.一.Form:1.肯定句:S(主语)+have/has+PP(过去分词)2.否定句:S(主语)+have/has+not+PP(过去分词3.疑问句Have/has+S(主语)+PP(过去分词)?Yes,S+have/has.No,S+have/hasn’t助动词have和has跟前面的主语缩略为’ve

6、,’s.如they’ve,we’ve,he’s,it’s;hasnot=hasn’thavenot=haven’t说　　明：四、特征词（１）already(肯定句)yet(否定句和疑问句)never，ever(疑问句)just(谓语动词之前)before(句末）（２）inthepast/lastfewyears,(过去几年来)sofar=uptonow／tillnow／bynowthesedayssince/eversincefor+时间段注　意：(1)since＋一段时间＋ago＝for＋时间段;sincetwoweeksago=fort

7、woweeks;Ihavekeptthelibrarybookforaweek.=Ihavekeptthelibrarybooksinceaweekago.(2)since+时间点＝for＋时间段since2000=for７years(3)since+从句(常用一般过去时)TheGreenshavelivedinBeijingsincetheymovedtoBeijingfromParis(4)Itis/hasbeen+一段时间+since从句.自从某事发生已有一段时间了.Itis/hasbeentwoyearssincemybrother

8、joinedthearmy.(5)havegot,hasgot虽然是现在完成时,但havegot=havehasgot==hasIhaveanewbike.=Ihavegotan