英语语法1.could have been/would be是什么用法,都可以表示虚拟语气吗?2.the editor

来源：学生作业帮编辑：灵鹊做题网作业帮分类：英语作业时间：2024/05/08 17:41:01

英语语法
1.could have been/would be是什么用法,都可以表示虚拟语气吗?
2.the editor was getting impatient.这是系表结构的进行时态吗?
.如果could/must have been+人，

1.你说的是虚拟语气中的两种用法
a.与现在事实相反的虚拟语气
即if从句的动词用过去时,主句则用过去时助动词.
例：If i were rich,i would help you.
如果我有钱,
可事实并非如此,即我现在没有钱.
b.与过去事实相反的虚拟语气
即if从句的动词要用过去完成时,主句则是助动词的过去时再加上“have+过去分词”
例：if i had arrived earlier,i could have met him.
要是当时我早点到,就可以见到他了.
可过去当时事实并非如此.
2.过去进行时态.

英语语法1.could have been/would be是什么用法,都可以表示虚拟语气吗?2.the editor 虚拟语气中would could should might have done与had done都是表示过去,在用法上有 would have been 一定为虚拟语气? 虚拟语气would have done 的用法虚拟语气could/should/would/might +have done 用法的差别? wish的虚拟语气在表示对过去情况的虚拟 wish + 主语 + would（could）+ have + 过去分词表示英语语法：I could have fooled you.情态动词+完成时形成虚拟语气用法,本来可以作但没做,但今天人说虚拟语气中的could/should/might/would的用法虚拟语气would should could might四个词用法讲解关于虚拟语气should would could 用法及区别 could have done 表示过去有必要做某事却未做 could not have done没有虚拟语气的用法,只英语：could have done除了表示过去的虚拟语气还可以表示将来的?