温故而知新：UNIT5-6强化与精练21.(北京春)Wewereswimminginthelake______suddenlythestormstarted.A.whenB.whileC.untilD.before2.(江苏)______Iacceptthatheisnotperfect,Idoactuallyliketheperson.A.WhileB.SinceC.BeforeD.Unless3.Themeetingdidn'tstart___everyonewasthere.A.becauseB.untilC.whyD.if4.(北京)Itisalmostfiveyears______wesaweachotherlasttime.A.beforeB.sinceC.afterD.because1.时间状语从句连词：难点：BEFORE[北京新西城一模]Itwassixweeks____Irealizedthepaintingwasmissing.A.asB.beforeC.sinceD.whenItwas+时间段+before+句子Itwas5yearsbeforeIfoundmysister…之后，才…10天之后，我才离开了我的学校一个月之后，他们才结婚30年之后，他才回到中国（returntoChina)将会是300年之后，中国才能赢得世界杯Itwas300yearsbeforechinawontheWorldCupItis300yearsbeforeChinawinstheWorldCupItwillbe300yearsbeforeChinawinstheWorldCup过去时：Itwas+时间段+before+did现在时：Itwillbe+时间段+before+does将会是一个月之后我们才上学将会是3年之后我们才中学毕业（graduatefrommiddleschool)将会是10年之后我们才开始工作Itwassometime_______werealizedthetruth.(山东中考)A.whenB.untilC.sinceD.before4．Scientistssayitmaybefiveorsixyears_______itispossibletotestthismedicineonhumanpatients.(福建高考)A.sinceB.afterC.beforeDwhen.Itwasnotlongbeforewereturnedback.口语句型要牢记：Itwasn’tlongbefore…很快我们就到达了机场Wearrivedattheairport_____很快我就写完了作业不久公交车就来了想想看：Itwas5years_____IsawmybrotherItis5years_____IsawmybrotherItwas5o’clock_____Isawmybrother12.条件状语从句：IF/UNLESS/ASLONGAS(1)连词：if/as(so)longas/unlessWewillstayathomeifitsnowstomorrow?I’lllendmycartoyouaslongasyoutakegoodcareofitDon’tleavethebuildingunlessIfinishyourwork(2)时态：主将从现I’llhelpyouwithyourEnglishif/aslongasIamfreetomorrow.Hewon’tbelateunlessheisill.(3)难点if(aslongas)与unless的辨析Youwillkeephealthyunlessyoueatthecorrectfoodandtakeenoughexercise(北京)Youmayusetheroom________youcleanitupafterwards.A．unlessB．solongasC．incaseD．Though(陕西)Myparentswon’tmindwhatjobIdo______Iamhappy.A．eventhoughB．assoonasC．aslongasD．when1....
