She was ill,She can t have attended the meeting here
问题描述:
She was ill,She can t have attended the meeting here
为什么用can t have attended 而不用 could not be able to attend
答
could 怎么还和be able to 连用?
can't have done sth本身表示对过去情况的否定推测,意为:“根本不可能.”