作业帮这里的must have been seen 是啥时态啊?
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/31 15:39:57
老师举了一个有关must have been的例子 I must have been seen you yestaday 这里的must have been seen 是啥时态啊?现完不是have been 吗?
解题思路： must表示推测的一种用法
解题过程：
must have done表示对过去发生事情的推测. (主动语态）
比如说 He must have made it for you.他一定是为你制作的。
must have been done 表示对某事一定已经被做的推测。（被动语态）
I must have been seen by you yestaday.
我一定是昨天被你看到的。
同学：在你写的原句中可能掉了一个单词by.
最终答案：略
解题过程：
must have done表示对过去发生事情的推测. (主动语态）
比如说 He must have made it for you.他一定是为你制作的。
must have been done 表示对某事一定已经被做的推测。（被动语态）
I must have been seen by you yestaday.
我一定是昨天被你看到的。
同学：在你写的原句中可能掉了一个单词by.
最终答案：略
have been seeing /have been seen/ have seen的用法.
have been的时态.
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He must have been caught in the rain,as can be seen from his
have been to这里的have 这里have been是延续性动词吗?have been to后能跟for和si