牛津英语二模块三单元Grammarppt课件.ppt

《牛津英语二模块三单元Grammarppt课件.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Unit3GrammarPresentperfecttenseNanjingNo.1MiddleSchool祖军武、朱丽、万力新、李爱贞、方颖GooverthenewsstoryonPage2andfindthesentencesusingthepresentperfecttense.Pleaseexplainwhythetenseisusedinthesesentences.TheusesofthepresentperfecttenseThedisappearanceofJustin(make)Kellyveryunhappy.hasmadeWeusethepresen

2、tperfecttensetotalkaboutthingsthathappenedintherecentpast,butareconnectedtothepresent.I(notsee)JustinsincelastFridaynight.havenotseenWealsousethepresentperfecttensetotalkaboutsomethingthatstartedinthepast,andisstillhappeningnow.Completethefollowingsentenceswiththepropertense.1We(study)Eng

3、lishforaboutfiveyears.2They(live)inthesouthsincetheirdaughterwasborn.3I(read)yourarticlethreetimes.It’swellwritten.4Thestudent(finish)herhomeworkalready.5Eric(go)backtohishometowntoday.6Thepolice(justfinish)searchingthearea.havestudiedhavelivedhavereadhasfinishedhasgonehavejustfinishedWeu

4、sethepresentperfecttensewhentheexacttimeofanactionisnotclearorimportant.Weuseitwithtimeexpressionssuchas:alreadyeverforjustlatelyneverrecentlysinceyetalready,yet;for,sinceWeusealreadyforaffirmativestatementsandyetfornegativestatements.Weusefor+aperiodoftimeandsince+apointintime.Hehasjustg

5、oneout.(=Hewentoutafewminutesago.)Weusethepresentperfecttenseheretotellothersthatheisn’therenow.Ihavejustheardthenews.(NowIknowthenews.)Weusethepresentperfecttensetotalkaboutactionsthatwerecompletedonlyashorttimeago.Inthiscase,justisused.Payattentiontothepositionofjust.Wecanalsousethepres

6、entperfecttenseforrepeatedactions,thatis,weusethepresentperfecttensewiththetimeexpressionsonce/twice/threetimes…Tomhasrungupthreetimesthismorning.(Nowitisstillinthemorning.)Tomrangupthreetimesthismorning.(Nowitisnotstillinthemorning.)Actionsoccurringinanincompleteperiodmightbeindicatedbyt

7、odayorthismorning/afternoon/evening/week/month/year/centuryorallday/night/week,allthetime,alwaysetc.Lookatthefollowingsentencesandpointoutwhattenseortensesareusedinthemandthereasonswhytheyareused.1WehavestudiedEnglishforaboutfiveyears.Webegantostudyitfiveyearsago.2T