主将从现

1.Whenhecomesback,Iwilltellhimthenews.2.Ifhecomesback,Iwilltellhimthenews.3.Toyswillbedirtyifyouputtheminthesands.4.Lilywillneverknowthismatterifyoudon'ttellher5.Theywillneverletyouknowuntilithappens.6.IwillseeyourfatherassoonasIgetthere.•在if,assoonas,when，once，until•等引导的从句中，通常用一般现在时态，而主句用一般将来时，这就是通常所说的主将从现•Ifyoudon'tcatchthebus,you'llgothereonfoot.如果你赶不上那趟车，你就要走着去那了。•主将从现•主将从现是指在时间状语从句和条件状语从句中，如果主句是一般将来时，从句用一般现在时替代一般将来时。一、主句是一般将来时，那么从句常常用一般现在时如：WhenIgrowup,I’llbeanurseandlookafterpatients二、如果主句是祈使句，那么从句通常要用一般现在时如：Don’tlaughatmewhenImakeamistake.三、如果主句是含有情态动词的一般现在时，根据需要从句多用一般现在时如：YoushouldbequietwhenyouareinthereadingroomIwilltellhimaboutitwhenhecomes.Ifitisfinetomorrow,wewillgooutside.•Ifhehastime,hewillcometomorrow.•Ifshefinishesearly,shecancomebackearly.•Ifyoudon’tdohomework,theteacherwillscoldyou.•1.IfIcome,I________(see)you.•2.Ifitisfine,we______(go)forawalk.•3.Youwillspoilitifyou______(notbe)careful.•4.WillyouhelpmeifI_____(need)you.•5.Theywillgetwetifit_____(rain).•6.Ifyoueattoomuch,you______(get)ill.