when ,how soon用法区别

Question

如题所述

Answer 1

when 副词
1.(用作疑问副词)什么时候,何时
I'd like to know when they'll let him out.
我想知道他们什么时候放他。
When did you last see Margaret?
你上一次见到玛格丽特是什么时候?
2.(用作关系副词,引导关系从句)当...时
There were times when I didn't know what to do.
有些时候我不知道该怎么办才好。

how soon 时间/期间〕多快
eg. How soon will you finish your homework
In about an hour.

Answer 2

how soon多久以后，通常用于将来时态 when 什么时候，用于疑问句和状语从句

Answer 3

when 是时间的疑问代词，什么时候。
how soon是多久，多长时间