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present and future unreal conditionals和past unreal condition

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/18 13:03:05
present and future unreal conditionals和past unreal conditionals分别是哪两个语法,这两个用的时候有什有什么区别么?
第一个是现在和将来虚拟条件句. 第二个是过去虚拟条件句.
第一个是对现在或将来的情况进行假设;第二个是对过去的情况进行假设.
例如:
if i had enough money, i would buy a big house. 如果我有钱,我就买所大房子.对现在情况的虚拟.从句用一般过去时,主句用would/should/could/might+ do
if i were free tomorrow, i would help you. 如果我明天有空,我会帮助你.对将来的虚拟.从句用一般过去时,主句用would/should/could/might+do
if you had took part in the meeting yesterday, you would have known what we talked about. 如果你去看了这部电影昨天参加了会议,你就会知道我们讨论了什么. 对过去情况的虚拟.从句用过去完成时,主句用would/should/could/might+have done
还有一些其他形式,查看虚拟语气就可以了