m6unit4grammar课件

Grammar&Usage
SubjunctiveMood
Revision
虚拟语气 
1)概念 虚拟语气用来表示说话人的主观愿望或假想,所说的是一个条件,不一定是事实,或与事实相反。
2)在条件句中的应用 条件句可分为两类,一类为真实条件句,一类为非真实条件句。非真实条件句表示的是假设的或实际可能性不大的情况,故采用虚拟语气。
在条件状语从句和结果状语从句中,表示与事实相反的条件和结果。
1)与现在事实相反:
If主语…,主语+V原
2)与过去事实相反:
If主语,主语+haveVe
3)与将来事实相反:
If主语…,主语+V原
were
V-ed
should(would
could,might)
should(would
could,might)
should
wereto
should(would
could,might)
hadVed
2.假设条件虚拟倒装。条件从句中有should,were,had三个助动词可以把if省略,并将这三个词提至句首。
IfIwereyou,Iwouldgiveitup.
WereIyou,Iwouldgiveitup.
Ifitwerenotforyouradvice,wecouldn’thavegotoverthedifficulties.
Wereitnotforyouradvice,wecouldn’thavegotoverthedifficulties.
IfIhadhadtime,Iwouldhaverunroundthatlakeagain.
HadIhadtime,Iwouldhaverunroundthatlakeagain.
Ifthereshouldbeaflood,whatshouldwedo?
Shouldtherebeaflood,whatshouldwedo?
Hadyoulistenedtothedoctor,you_________all
rightnow.
A.areB.were
C.wouldbeD.wouldhavebeen
2.__________anychangeaboutthedate,pleatellme
immediately.
A.WilltherebeB.Shouldtherebe
C.TherewillbeD.Thereshouldbe
3.__________today,hewouldgettherebyFriday.
A.WouldheleaveB.Washeleaving
C.WerehetoleaveD.Ifheleave
Practi:
4.Shoulditrain,thecrops_____.
A.wouldbesavedB.wouldhavebeensaved
C.willbesavedD.hadbeensaved
5.You_____comeearlier.Thebuslefta
momentago.
A.wouldB.shouldhave
C.mayD.have
6.Whatshouldwedoifit_____tomorrow?
A.shouldsnowB.wouldsnow
C.snowD.willsnow
7.You_____suchariousmistakeifyouhad
followedhisadvice.
A.maynotmakeB.mightnotmake
C.shouldn’thavemadeD.mightnothavemade
8.Ifitwerenotforthefactthatyou_____ill,I
wouldaskyoutodothisrightnow.
A.wereB.hadbeen
C.areD.shouldbe