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RevisionSheisdoingherhomework.Ifyouplaycomputergamesonweekdays,1)条件状语从句通常由if或unless(=ifnot)引导,从句中惯用普通时代替未来时,即if或unless后句子谓语用普通现在时。不过,主句则通惯用未来时,情态动词或祈使句。1.假如主句是普通未来时,从句则用普通现在时。Ifitrains(从句),Iwillstayathome.I’llgowithyouifyoudon’twanttogoalone(从句).2.假如主句含有must,may,can等情态动词,从句也要用普通现在时。Ifyoudrivetoofast,youmayhaveanaccident.Youmuststopifthetrafficlightisred.3.假如主句是祈使句,从句一样要用普通现在时。Don’tgoandplayfootballifyoudon’tfinishyourhomework.PleasecallmeifhecomesnextSunday.If引导条状语从句时,从句中用普通现在时代替普通未来时。Ifyouarefreethisweekend,whatwillyoudo?Ifyouwanttogetgoodmarks,dowhat?Don’tdowhat?If条件句替换形式:(1)祈使句+and/or+陈说句(谓语动词通惯用未来时态)。其中,and表示句意顺承;or表示转折,意为“不然”。e.g.Ifyouworkhard,you’llpasstheexameasily.=Workhard,andyou’llpasstheexameasily.Ifyoudon’tworkhard,you’llfallbehindothers.=Workhard,oryou’llfallbehindothers.(2)用介词with,without替换形式:e.g.Ifthereisnowater,thefishmaydie.=Fishmaydiewithoutwater.Ifyouhelpme,I’llfinishmytaskontime.=Withyourhelp,I’llfinishmytaskontime.if引导条件状语从句和if引导宾语从句区分:2.if在从句中位置不一样3.时态要求上有区分找出以下句子中哪些是if条件状语从句,哪些是if宾语从句If引导条件状语从句或宾语从句练习summary