__________,I'dhavetoldyou.__________,I'dhavetoldyou.A.IfiwouldhaveknownitB.IfihadhaveknowitC.HadIknownitD.ShouldIknowit老师,这道题我知道是考的虚拟语气,为什么要选C呢?这是什么用法?如果用If
__________,I'dhavetoldyou.__________,I'dhavetoldyou.
A.IfiwouldhaveknownitB.Ifihadhaveknowit
C.HadIknownitD.ShouldIknowit
老师,这道题我知道是考的虚拟语气,为什么要选C呢?这是什么用法?
如果用IfIhadknownit可以吗?还有虚拟语气怎么区分那个是主句哪个是从句?
1.答案：C.
2.解释：
1）HadIknownit=IfIhadknownit
这是if引导的条件状语从句使用虚拟语气时常常考查的倒装语法.
2）如果if从句中出现了were/should/had的话,可以把这三个词提前至从句句首,并且把if省略.
如：IfIwereyou,Iwouldsaynotohim.
=WereIyou,Iwouldsaynotohim.
Ifyouweretoleavetomorrow,Iwouldnotvisityourfamily.
=Wereyoutoleavetomorrow,Iwouldnotvisityourfamily.
Ifyoushouldleavetomorrow,Iwouldnotvisityourfamily.
=Shouldyouleavetomorrow,Iwouldnotvisityourfamily.
3）最后需要提醒你的是,如果if从句出现not否定时,则not不能与上述三词一起提前.
如：Ifhehadn'ttakenyouradvice,hewouldsucceednow.
=Hadhenottakenyouradvice,hewouldsucceednow.
而变成：Hadnothetakenyouradvice,hewouldsucceednow.或Hadn'thetakenyouradvice,hewouldsucceednow的话,都是错误的.原创回答团（第159号会员）
