_______, our experiment would have failed.
来源:百度知道 编辑:UC知道 时间:2024/06/23 00:12:12
A.Should he not help us
B.Did he not help us
C.Had he not helped us
D.If he has not helped us
B.Did he not help us
C.Had he not helped us
D.If he has not helped us
C
c,虚拟语气
C
由后一句我们的实验将会失败(而且此句用了过去将来完成时),可知前面应该用过去完成时了,因为省略了if所以had提前,句子倒装。
c
C,后面是过去将来完成时,虚拟语气,对应的是过去完成时。
过去将来完成时态的基本的用法
1)表示在过去将来某时间以前发生的动作,并且会对过去将来某一时间产生影响。
He told me he would have finished it by 9.
他告诉我他将在9点钟的时候完成。
2)用在虚拟语气
If you had not helped me,I would not have succeeded.
如果你不 帮我,我 是不会成功的。
http://www.grammarspot.com/html/Tenses/Perfect_tense/20070827/258.html
C
There are there _______ in our school.
we searched for our monitor but he was _______
There are many _______(company) in our city
6.There _______ two concerts in our school next month.
3. Our teacher often _______ (arrive) at school early in the school.是不是填arrives
What _______ the experts most is the increasing level of pollution in our cities.
But for their assistance our corporation would not have made such a great progress _______.
_______物理题目_______
ex-clients???
EX:是什么意思?