If-引导的条件状语从句.doc

If引导的条件状语从句
If引导的条件状语从句遵循主过从过、主将从现的原则。
主将从现（主情从现、主祈从现）
Ifitrainstomorrow,Iwon’tclimbthehills.
Ifitdoesn’traintomorrow,Iwillgotothecountrysidewithmyfriends.
If引导的条件状语从句
If引导的条件状语从句遵循主过从过、主将从现的原则。
主将从现（主情从现、主祈从现）
Ifyouwillhelpme,I'llfinishitontime.
Wemaygooutifit'sfinetomorrow.
Ifyoufinishyourhomework,youcanwatchTV.
PleasecallmeifyougoshoppingnextSunday.
IfIgothere，I'lltakehersomeflowers.
We'llstayathomeifitrainstomorrow.
Pleasecallmeifhe’sathome.
Ifyouworkharder,you’llpasstheexam.
Shewillvisithergrandpaifshehastimetomorrow.
We’lltakeataxitothecityifthetraindoesn’tarriveontime.
Theteacherwillbeangryifheislate.
If引导的条件状语从句与unless引导的条件状语从句的转换
If+否定形式=unless+肯定形式
Youwon’tpasstheexamifyoudon’tworkhard.
=Youwon’tpasstheexamunlessyouworkhard.
Ifyoudon’tgotobedearlier,youwillfeeltiredinthemorning.
=Unlessyougotobedearlier,youwillfeeltiredinthemorning.
Ifitdoesn’train,hewillplaywithmetomorrow.
=Unlessitrains,hewillplaywithmetomorrow.
Ifshedoesn’tcome,I’llgoshoppingalone
=Unlessshecomes,I’llgoshoppingalone.
if条件状语从句与祈使句,and/or＋一般将来时的句子转化
Ifyougetupearly,you’llgetthereontime.
=Getupearly,andyou’llgetthereontime.
=Getupearly,oryouwon’tgetthereontime.
Ifyougetupearly，youwon'tbelateforschool.
=Getupearly，andyouwon'tbelateforschool.
=Getupearly，oryouwillbelateforschool.
Ifyoudon’tgetupearly,youwon’tcatchupwiththeearlybus.
=Getupearly,andyouwillcatchupwiththeearlybus.
=Getupearly,oryouwon’tcatchupwiththeearlybus.
if条件状语从句与without的句子转化
Ifthereisnowater,wecan'tlive.
=Wecan'tlivewithoutwater.
Ifthereisnowater,fishwilldie.
=Fishwilldiewithoutwater.
Ifyouhelpme,I’llfinishtheworksoon.
=Withyourhelp,Ifinishtheworksoon.
if条件状语从句与祈使句,and/or＋一般将来时的句子转化
Ifyougetupearly,you’llgetthereontime.
=Getupearly,andyou’llgetthereontime.
=Getupearly,oryouwon’tgetthereontime.
Ifyougetupearly，youwon'tbelateforschool.
=Getupearly，andyouwon'tbelateforschool.
=Getupearly，oryouwillbelateforschool.
Ifyoudon’tgetupearly,youwon’tcatchupwiththeearlybus.
=Getupearly,andyouwillcatchupwiththeearlybus.
=Getupearly,ory