现在完成时和一般现在时的区别

Agoodbookisagoodfriend.April23rdHaveyoureadbookstoday?Unit8HaveyoureadTreasureIslandyet?Period2:SectionA4a-4cHaveyouread

RobinsonCrusoeyet?Yes,Ihave.\No,Ihaven’t.A:Whatbookshaveyoualready

read?B:I’vealreadyread

DreamoftheRedChamberandJourneytotheWest.A:Whatdoyouthinkofthem?B:Well,IthinkDreamoftheRedChamberwasboring,butJourneytotheWestwasabitexciting.Explanation

Already和yetAlready若用在疑问句中，常表示吃惊意外的语气。此时Already常放在句末或句中。Haveyoufinishedyourhomework________?你的作业完成了吗？（我以为你没有做完，表示出乎意料。）HaveatryalreadyA:Whatmovieshaveyoualreadyseen?

B:I’vealreadyseen

ShaoLinTemple.A:Whatdoyouthinkofit?

B:Well,Ithinkit’swonderful.A:Whatsongshaveyoualreadyheard?

B:I’vealreadyheard

SuperStar.A:Whatdoyouthinkofit?

B:Well,Ithinkit’sbeautiful.Let'sdoasurvey.4cCompletethechartwithinformationaboutyouandafriend.YouYourfriendCommentsBooksIhavealreadyreadMoviesIhavealreadyseenSongsIhavealreadyheardReportI’vealreadyreadthebook.

Ithinkit’s.

Myfriend

hasreadabookcalled

.He\Shethinksit’s.现在完成时(一)1、构成:助动词have（has）+过去分词(have/hasdonesth)其否定句在Have/has后加not.一般疑问句把have/has提到主语前.GrammarIhave=I’veshehas=she’shavenot=haven’thasnot=hasn’t句型转换1.Ihavefinishedmyhomework.①I____________myhomework.(改为否定句)②—______you______yourhomework?(改为一般疑问句并作肯定回答)—Yes，____________.答案：1.①haven’tfinished②Have；finished；Ihave2.Hisdreamhascometrue.(改为一般疑问句并作否定回答)---______hisdream______true?---No，____________.

答案：2.Has；come；ithasn’t

规则变化：过去式和过去分词的变化相同一般在动词词尾直接加ed。

以不发音的e结尾的动词后面加d。

以“辅音字母+y”结尾的动词，变y为i，再加-ed。词尾只有一个辅音字母的重读闭音节动词，要双写辅音字母，再加-ed。不规则变化：5.以不变应万变。如：let→let→let;put→put→put;read→read→read6.若中间有双写e，则去掉一个e，单词末尾再加t。如：feel→felt→felt;keep→kept→kept;sleep→slept→slept7.结尾的字母d变t。如：lend→lent→lent;build→built→built;send→sent→sent8.变为以-ought或-aught结尾。如：buy→bought→bought;bring→brought→brought;catch→caught→caught;teach→taught→taught2、表过去发生的某一动作对现在造成的影响或结果。例如：Ihavejustcleanedmyclothes.我刚洗过衣服。（“洗衣服”是发生在过去的动作，对现在造成的结果是“衣服干净了”）Ihavejusthadmybreakfast.(对现在的影响：不饿)--HaveyoureadLittleWomenyet?--No,Ihaven’t.(我对该书不了解）3、通常与表示包括现在在内的时间副词just（刚刚）,already（已经）,before,yet（一般疑问：已经；否定句：还）never,ever等状语连用。

①---DoyouknowthereisapandainYiChang?---No.Ihaveneverheardofthatbefore.②IhaveneverbeentoBeijing.③Theplanehasnotcomeyet.④Shehasalreadyfinishedthework.⑤I’vejustfinishedmyhomework.

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:haveyouseenthefilm?B:Yes,Ihave.A:Whendidyouseeit?B:IsawitlastSunday.A:I`vehadthebookfortwoyears.B:Wheredidyoubuyit?A:Iboughtitinmyhometown.完成汉译英，猜一猜：现在完成时和一般过去时的用法有什么不同？注意点一：现在完成时与一般过去时的用法比较现在完成时表示过去的动作一直延续到现在甚至会继续下去或表示过去的动作对现在造成的影响；一般过去时表示动作发生的时间在过去。现在完成时属于现在时态范围，因此，不能和表示过去的时间状语连用。如：yesterday,lastnight,twoweeksago等试比较：Theplanehasarrived.飞机已经来了。（说明现在的情况：飞机在这儿）Theplanearrivedaquarterago.飞机是一刻中以前来的。（强调动作发生的时间在过去）根据语境及括号内所给词的提示填空。1.---

you

(do)yourhomeworkyet?

---Yes,I

(do)ityesterdayafternoon.2.Myfather

(go)toShanghailastweekandhe

(return)nextweek.3.Susan

(begin)torepairherradiothreehoursago,butshe

(notfinish)ityet.4.---Howmanybookshaveyousold?----I

(sell)about200books.There

(be)only20booksleft.

Havedonedidwentwillreturn

beganhasn’tfinishedhavesoldare活学活用1.Writetheformsofthepasttenseandpastparticiple:drink____________see____________find____________leave____________tell____________drankdrunksawseenfoundfoundleftlefttoldtold不规则动词的过去式和过去分词可分为4类：AAA型：readread

readcutcut

cut

letlet

lethithit

hithurthurt

hurt

ABA型：becomebecamebecomecomecamecomeABB型:buildbuiltbuiltfeedfedfedfeelfeltfeltfindfoundfoundkeepkeptkeptleaveleftleftABC型:am\is\arewas\werebeenbeginbeganbegundodiddonedrinkdrankdrunkeatateeatenfallfellfallenlielaylainflyflewflown

Exercises

4aUsethewordsinbracketstocompletetheconversations.1.A:Wouldyoulikesomethingtodrink?B:No,thanks._______________________.(just/drinksometea)2.A:Iheardyoulostyourkey.____________________?(find)B:No,notyet.IhavejustdrunksometeaHaveyoufoundit3.A:DoyouknowwhenTomisleaving?B:________________________.(already/leave)A:When___________________?(leave)B:Thismorning.4.A:Isyoursistergoingtothemovieswithustonight?B:No.__________________________.(already/seethefilm)HehasalreadyleftdidheleaveShehasalreadyseenthefilm5.A:Whatdoyourparentsthinkaboutourplan?B:I__________________.(not/tellthem/yet)haven’ttoldthemyet4bFillintheblankswiththecorrectf