关于having done

来源：学生作业帮编辑：搜狗做题网作业帮分类：英语作业时间：2024/07/05 17:04:17

关于having done
是不是只要动作在谓语动作之前发生,就一定要用having done的形式?有什么特例吗?

您提出来的having done是指现在分词的完成形式作状语,表示这动作在谓语所表示的动作之前发生,通常情况是如您所言.
Having driven all day,we were rather tired.(having driven表示的"先时性的行为")
常见的例外是从属关联词 after 引导的从句是带现在分词的省略句;
这个时侯,after 后面跟having done 或跟doing的意思基本上一样,
如:1) After picking up his things,he hurried to the station.
2)After having finished his task,he went to bed.
为什么可以交替使用呢?原因是 after的词义意思是"在.以后"
替换用后,不会引起动作或存在状态在时间上与谓语的混淆.
1) 和2)句的细微区别是 After + having done 更具强调性.

关于having done 关于非谓语having done 的用法一道英语单选关于having done 关于having been done这个语法关于having been done 和 have been done的区别 Having been done ,done,having done not having done 还是having not done? never having done还是having never done having been done 和 done 关于done和having been done在非谓语中的区别 having done ,和 doing having done 做主语