as soon as,until,whlie和when的区别最好有些例子．

you must have lunch as soon as possible.
你必须马上吃中饭。
you must finish your homework until I come back.
在我回来前你必须完成你的作业。
I was watching TV whlie my mother was washing clothes.
在我看电视的时候妈妈在洗衣服。
I went to school when my mother had washeded clothes.
在妈妈洗衣服的时候，我去学校了

1、时间状语从句

(1)as、when、while用法一览表。

类别 作 用 例 句

as as表示“当……的时候”,往往和when/ while通用,但它着重强调主句与从句的动作或事情同时或几乎同时发生。 She came up as I was cooking.(同时)

The runners started as the gun went off.(几乎同时)

when (at or during the time that )既可以表示在某一点的时候,又可表示在某一段时间内,主句与从句的动作或事情可以同时发生也可以先后发生。 It was raining when we arrived.(指时间点)

When we were at school, we went to the library every day.(在一段时间内)

while while意思是“当……的时候”或“在某一段时间里”。主句中的动作或事情在从句中的动作或事情的进展过程中发生,从句中的动词一般要用延续性动词。在 when表示a period of time时,两者可以互换。 Please don’t talk so loud while others are working.

He fell asleep while/when reading. Strike while the iron is hot.(用as或when