9上Unit4grammar

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1、Howmuchdoyouknowabouthim?MakeaguessaboutYaoMing’slegend!Whenhewas9,Afterhetooksomebasketballtraining,While(hewas)attendingjuniorhigh,heshowedhistalentinthegame.hejoinedtheShanghaiYouthTeam.hetooksomebasketballtraining.________hewasborn,hewasbelievedtobeco

2、meafuturebasketballstar.2.08m&1.88mBeforeHowtouse“before”&“after”?Beforehewasborn,hewasbelievedtobecomeafuturebasketballstar.Afterhetooksomebasketballtraining,heshowedhistalentinthegame.afterbeforeatanearliertimethanatalatertimethan在……之前在……之后Youshouldturn

3、offthelights_________youleavetheroom.=Youshouldturnoffthelights_____________theroom.2.Tomwenttoschool________hefinishedhisbreakfast.=______________hisbreakfast.3.Thesuncameout________thestormstopped.Filltheblankswith“before”&“after”beforebeforeleavingaft

4、erafterfinishingafterbefore/after+句子或doing形式Howtouse“when”&“while”?Whenhewas9,hetooksomebasketballtraining.While(hewas)attendingthejuniorhigh,hejoinedtheShanghaiYouthTeam.when既指时间点，也可指一段时间；因此when引导的时间状语从句中的动词可以是终止性动词（过去时）或延续性动词（进行时）。while只指一段时间，while从句中的动

5、词必须是延续性动词（进行时）。Thedaysgetlonger_________springcomes.___________theboyswereplayingfootball,itrained.3.Iwasabouttoleave_______thephonerang.4.Jackisstrong______hisbrotherisweak.Filltheblankswith“when”&“while”whenWhen/whilewhen当主句和从句主语一致且从句中有be动词时，可省略从句的主语和be

6、动词while正在此时，突然……表然而5.While______,hereceivedacallfromhismum.theTVwasonB.hewaswatchingTVC.hewatchedTVD.heiswatchingTVB注意：我们可以用before,after,when和while引导时间状语从句，这些词既可放在句首，也可放在句中。Davidiswritinginhisdiaryaboutoneofhisdays.Helphimcombinehissentencesusingbefore,af

7、ter,whenorwhile.(P54)A1.Igotojoggingeverymorning.ThenIhavebreakfast._____________________________________________________________________2.Ipractisedplayingbasketballforhours.Ifelttiredout.__________________________________________________________________

8、____IgojoggingeverymorningbeforeIhavebreakfast.AfterIpractisedplayingbasketballforhours,Ifelttiredout.3.ImetPeter.Iwaswaitingatthebusstop.__________________________________________________________________4.Iwaswatch