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答案
时间
If条件句(谓语动词形式)
主句(谓语动词形式)
现在
过去式/be(were)
would/shouldXXXXXdo
过去
had done
Would/shouldXXXXXhave done
将来
过去式/should do/were to do
Would/should do
省略if
把had、were、should等提到句首,用倒装语序
复习:
BBAAB
自主学习:
If 从句与过去事实相反,故用had done, 主句与现在事实相反,故用would be.
AB
虚拟语气的其他用法:
在宾语从句中的应用。
表示命令、建议、要求等的动词+宾语从句,从句用虚拟语气。(should )+ do 的形式。常见的词:suggest,advise,recommend,propose;order,command;require,request,demand;insist。
are were
ACBC
I demanded he (should ) answer me immediately.
在主语从句在的应用。
1. It is necessary(important, natural, strange, etc.) + that 句。
2. It was a pity (a shame, no wonder, etc.)that +that 句。
3. It will be desired(suggested, decided, ordered, requested, proposed, etc.) that +句。
用(should)+do
BCB
在表语从句,同位语从句中的应用。
表示建议、要求和命令对应的名词后面跟表语从句或同位语从句时,从句通常用虚拟语气(should)+ do。
DBA
My suggestion is that you should practice speaking English as often as possible.
在状语从句中的应用。
Even if/even though, as if/as though 引导状语从句时,如表示与事实相反时用虚拟语气。
She talked about the film as if she had seen it before.
ACC
Mr Green spoke slowly so that/in order that he could make himself heard clearly by his students.
虚拟语气的几个句式:
Wish句式:
Wish that +句子。“但愿XXXXXXXXXX就好了”。与现在事实相反,谓语动词用过去式、be(were); 与过去事实相反,用had done; 与将来事实相反,用would + do.
CB
If only /only if 句式:
If only 通常要用虚拟语气。而only if “只有XXXXXXXXXX才XXXXXXXXXX”,放在句首,用部分倒装。
D
It’s (high ) time thatXXXXXXXXXX, would rather thatXXXXXXXXXX句式:
It’s time thatXXXXXXXXXX, 通常用过去式、be(were),或用should +do。
Would rather thatXXXXXXXXXX与现在事实相反,谓语动词用过去式,be(were);与过去事实相反,用had done; 与将来事实相反,用过去式。
DABC
含蓄句式:
But for/otherwise/or/without等引导短语相当于if 引导的条件状语从句,句子使用相应的动词形式。
ADB
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