asif虚拟语气的用法归纳表格 if虚拟语气用法?

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asif虚拟语气的用法归纳表格

if虚拟语气用法?

if虚拟语气用法?

1、表示与现在事实相反的情况:
从句:If 主语 动词一般过去时(Be动词用were)。
主句:主语 should/would/might/could do。
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/might/could have done。
3、表示与将来事实相反:
从句:①if 主语 were to do。
②if 主语 should do。
③if 主语 动词一般过去式(be动词用were)。
主句:主语 should/would/might/could do。

if虚拟语气的三种时态口诀?

1.If三种虚拟条件从句
1)与现在事实相反:if 主语 did/were, 主句(主语 would/could/should/might do )
2)与过去事实相反:if 主语 had done, 主句(主语 would/could/should/might have done )
3)与将来事实相反:if 主语 did/were/should do/ were to do, 主句(主语 would/could/should/might do )
(注意:这三种if从句,可以把if省略,从而把were/had/should提到句首——倒装,其他不变)
(注意:if从句也可以使用could表达对于现在、将来的虚拟)

请问asif虚拟语气的用法是什么?

as if (though)连接的从句,即可表示对现在、将来时间的虚拟,又可表示对过去时间的虚拟,句型:
主句 as if (though)
1.主语 were/过去时 ——〉表示与主句动作同时发生
2.主语 could/would 动词原形——〉表示动作可能在将来发生
3.主语 had 过去分词——〉表示从句谓语的动作发生在主句动作之前
eg. He treats me as if I were a stranger.
She talks about it again and again as if she would never end.
They talked as if they had been friends for years.