21课件

yet，时间副词有already，never，ever，since…含义Exercises:1____you____(see)thefilmyet?2MrWhite____never____(dive)inthesea3Ted____just_______(write)thecomposition4____Bruceever_____(read)thebook?5Jim_____already____(see)thefilm6They_________(know)eachotherforyears7He________(teach)mathssince2yearsago8Joe_________(stay)homeinthepastanhourHaveseenhasdivedhavewrittenHasreadhasseenhaveknownhastaughthasstayedWhat…?When…?Has…?Is…?Exercises:A:_____you_______(return)thebookyet?B:Yes，justb表示动作从过去一直延续到现在时间状语有sofar，inthepast…，Unit6MainlyRevisionLesson21TheSmithshavealreadybeentoHainanIslandIhavetravelledtoseveralplacesinChinasofarWehaveneversurfedWehaven’tgonescubadivingyetTheyhaveeverriddenahorseShehasjustwonthecompetitionChinahasbeeninWTOforyears/since2001GreatchangeshavetakenplaceinYanchenginthepasttenyearssummary现在完成时构成：have/has+过去分词a表示过去的动作对现在造成的影响和结果，for…，IhaveA:when___you_____(return)it?B:I________(return)ityesterdayA:___Br，