Unit 5 语法现在完成时课件 2021-2022学年沪教牛津版英语八年级上册.pptxVIP

GrammarUnit5Educationalexchanges

presentpastfuture

A.Thedefinition

Hi,Patrick.Wouldyouliketohavelunchwithme?Oh,sorry.Ihavehadlunch.Iwanttostayathome.Well,fine.Ihavestayedathomesincelastweek.Imustgooutforfun.

Thepresentperfecttense1.定义：1)表示过去某时刻开始持续到现在的动作或情况。Well,fine.Ihavestayedathomesincelastweek.Imustgooutforfun.2)表示过去发生的动作对现在造成的影响或结果。Oh,sorry.Ihavehadlunch.Iwanttostayathome.

B.Structures

Patrick,haveyouvisitedBeijingbefore?No,IhaventvisitedBeijing.Howaboutyou?Ofcourse,Ihave.AndmymomhasvisitedBeijingaswell.

1）基本结构：have/has+done2）肯定句：主语+has/have+done+其他.3）否定句：主语+has/have+not+done+其他.4）一般疑问句及肯否定回答：-Has/Have+主语+done+其他?-Yes,主语+has/have./No,主语+hasn’t/haven’t.5）特殊疑问句：特殊疑问词+has/have+主语+done+其他?

规则动词的过去分词与过去式的变化规则基本一致：1)一般在词尾直接加-ed。eg:look-looked2)以e结尾的，直接加-d。eg:move-moved3)以“辅音字母+y”结尾的，变y为i，再加-ed。eg:carry-carried4)重读闭音节单词需双写末尾辅音字母，再加-ed。eg:stop-stopped

不规则动词的变化没有规律，则要单独记忆see-saw-seenbe-was,were-beeneat-ate-eatenbreak-broke-brokengo-went-gonetake-took-takensend-sent-sentfind-found-foundmake-made-madehave-had-had

havemethaveplayedhascookedhavestudiedhaveseenhaven’tvisitedhaven’tdoneCompletethee-mailwiththepresentperfecttenseoftheverbsinbrackets.P72

C.Keywords

Patrick,IhavealreadyseenmanyplacesofinterestinBeijing.HaveyouseentheGreatWallyet?No,IhavenotseentheGreatWallyet.HaveyouevervisitedtheSummerPalace?No,IhavenevervisitedtheSummerPalace.

现在完成时的常见的时间状语有：already,yet,for,since,sofar,,ever,,inthepast…years,bynow,never,just,等。

①already,yetalready:已经，常用于肯定句（句中、句末）Ihavealreadyfinishedmyhomework.Canlgonow?Ihavefinishedmyhomeworkalready.CanIgonow?yet:还没,已经,常用于否定、疑问句（句末）--H