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条件状语从句.pdf

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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

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