if的虚拟语气有对过去的，现在的，将来的虚拟，是怎么写的？

Question

如题所述

Answer 1

1、表示与现在事实相反的情况：

从句：If+主语+过去时(Be动词用were)

主句：主语+ should/would+do：

1．If I were you,I would take an umbrella.

如果我是你，我会带把伞。（事实：我不可能是你）

2、表示与过去事实相反的情况

从句：If+主语+had+done

主句：主语+should/would+have done

eg：1． If I had gotten there earlier,I should/would have met her.
如果我早到那儿，我就会见到她。（事实：去晚了）

3、表示对将来情况的主观推测

从句：①if+主语+were to do （if 表示未来的虚拟语气独有该形式，其他如wish， even
if等词都没有该形式来表示未来的虚拟语气）

②if+主语+should+do

③if+主语+过去式（be动词用were）

主句：主语+should/would+do

eg：1．If he should come here tomorrow,I would talk to him.

如果他明天来这儿的话，我就跟他谈谈。（事实：来的可能性很小，不可能）

当虚拟条件句的谓语动词含有were,should,had时，if可以省略，这时条件从句要用倒装语序，即把were,should,had等词置于句首，这种多用于书面语。

Answer 2

现在：If I were you, I should go there.
If he liked music,he would know how to sing the song.
过去：If she had had time,she would have gone there.
If he had been a soldier, he would have killed the enemy.
将来：If I were to be a doctor, I would attend a medical college.
或形式与“现在”相同。本回答被网友采纳

Answer 3

将来

从句谓语形式，
动词过去式(be用were)
should + 动词原形
were to + 动词原形

主句谓语形式
would / should / might / could + 动词原形

现在

从句谓语形式
动词过去式(be 用 were)

主句谓语形式
would / should / might / could + 动词原形

过去

从句谓语形式
had +动词过去分词

主句谓语形式
would / should / might / could have + 动词过去分词