广东省广州市花都区赤坭中学七年级英语上册Unit6Grammar课件牛津深圳版.ppt

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1、if引导的条件状语从句(Conditionalsentences)Grammarbefreetomorrow,playbasketballIfIamfreetomorrow,I’llplaybasketball.I’llplaybasketballifIamfreetomorrow.doesn’traintomorrow,playfootballIfitdoesn’traintomorrow,I’llplayfootball.I’llplayfootballifitdoesn’traintomorrow.finishone’shomework,goswimmingIfIfinishm

2、yhomework,I’llgoswimming.I’llgoswimmingifIfinishmyhomework.if引导的条件状语从句观察下列例句，总结if引导的条件状语从句的用法。【例句】1.Ifyoustandintherain,yougetwet.2.Yougetwetifyoustandintherain.3.Ifitdoesn’traintomorrow,Iwillplantsomeflowersinmygarden.4.Iwillplantsomeflowersinmygardenifitdoesn’traintomorrow.if引导的条件状语从句【总结】1.if

3、意为“____”，引导____状语从句。当表示条件成立就必然有某种结果（常用于客观真理）时，主句和从句都用________时（例1、2）Forexample:1)Ifyoustandintherain,yougetwet.2)Yougetwetifyoustandintherain.如果条件一般现在当表示条件成立就可能有某种结果时，如果主句用_________时，则从句用_________时，简称“主将从现”（例3、4）。Forexample:3)Ifitdoesn’traintomorrow,Iwillplantsomeflowersinmygarden.4)Iwillplants

4、omeflowersinmygardenifitdoesn’traintomorrow.一般将来一般现在2.当if引导的从句在主句之前时，____（用/不用）逗号隔开两个句子（例1、3）；当主句在从句之前，则____（用/不用）加逗号（例2、4）。【例句】1)Ifyoustandintherain,yougetwet.2)Yougetwetifyoustandintherain.3)Ifitdoesn’traintomorrow,Iwillplantsomeflowersinmygarden.4)Iwillplantsomeflowersinmygardenifitdoesn’tra

5、intomorrow.用不用在if引导的条件状语从句中，还要注意前后时态一致的原则。Tips:ConditionalsentencesIfyouwalkalongtheBund，youwillseemanyoldbuildings.Theif-clausetalksaboutapossibleaction.Themainclausetalksaboutthelikelyresult.wecanalsoputtheif-clauseafterthemainclause.YouwillseemanyoldbuildingsifyouwalkalongtheBund.Mainclausei

6、f-clauseWorkouttheruleTheverbintheif-clauseisin(thesimplepresenttense/thesimplefuturetense).Theverbinthemainclauseisin(thesimplepresenttense/thesimplefuturetense).√√AWilliam’smumisgivinghimadviceabouthisproblems.Matchthehalf-sentencesfromtheboxestocompleteheradviceforhim.William’sproblemsIsome

7、timesbringthewrongbookstoschool.Ifyoucheckyourtimetableeverynight，youwillknowwhichbookstobring.2.Iwasawayfromschooltoday.Idonotknowwhathomeworktodo.Ifyoucallyourfriends,theywilltellyouwhathomeworktodo.3.Ihategettingup.Ialwaysfeelt