条件状语从句.pdf
条件状语从句
定义:即从句是主句成立的条件。常见引导词有if(如果),as(so)longas(只要),unless(除非,如果
不=if...not)。
运用1:
e.g.1.AtouristwilleasilylosehiswayinBeijing________hehasamaporaguide.(2010镇江)
A.ifB.becauseC.unlessD.when
运用2:
e.g.2.ShallwegoforapicnicthisSaturday?(2010淮安)
Allright,itrains.
A.IfB.WhenC.UnlessD.Until
过关练习1
1.Whatshallwedoitsnowstomorrow?
2.Don’tleavethebuildingItellyouto.
3.Youcangoouttoplayyoustayinthebackyard.
4.Hewontgotosleepyoutellhimastory.
5.Wouldyouliketogohikingwithme,Susan?(2010泰州)
I’dliketo,_______youdon’twanttogoalone.
A.untilB.beforeC.ifD.after
6.Youmayborrowmybook______________________________youkeepitclean.
7.Manypeoplecantlearnanylessonsfromthemistakestheyvemade_____theygethurtsomehow.
A.whetherB.unlessC.ifD.as
原理1:“祈使句+and(or)+陈述句”
“祈使句+and(or)+陈述句”相当于一个带有条件状语从句的复合句。
e.g.Hurryup,oryou’llbelate.=Ifyoudon’thurryup,you’llbelate.
e.g.Studyhardandyouwillpasstheexam.=Ifyoustudyhard,youwillpasstheexam.
过关练习2
1.Runfast,oryou’llbelateforschool.(同义句转换)
_________you__________________fast,you’llbelateforschool.
2.(give)meonemorehour,andI’llgettheworkfinished.
3.Standoverthere________you’llbeabletoseetheoilpaintingbetter.
A.butB.tillC.andD.or
原理2:主将从现
条件状语从句是对将来或虚拟的事件进行描述,主句经常使用的时态为一般将来时,从句必须用一般现在时
来替代一般将来时。我们将这种语法现象称之为“主将从现”。(谓语动词通常用