求解释as where when 在时间状语从句中的区别。

Question

如题所述

Answer 1

as，when
都可解释为“当…时候”，用来引导时间状语从句，但有区别：
1、when
意为
at
the
time
that“在…时”，多指“时间点”，例如：
When
he
returned
from
work,
his
wife
was
cooking.
他下班回家时，他的妻子正在做饭。
2、as
意为
at
the
same
time
that“正当……”或“与……同时”，它兼指“时间点”和“时间段”，从句的动词既可是短暂性动词，也可是持续性动词。例如：
The
door
bell
rang
as
we
were
having
breakfast.
正当我们吃饭的时候，门铃响了。
As
the
time
went
on，the
weather
got
worse
and
worse.
随着时间的推移，天气越来越糟。