一个语法问题while,until,till,still,when,as,as soon as这几个词可否帮我区分一下最

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一个语法问题
while,until,till,still,when,as,as soon as
这几个词可否帮我区分一下
最好加上用法和时态（最好有个例句）

1.when:指一点时间或一段时间.表示主句和从句的动作同时发生,也常表示从句的动作先于主句的动作.
e.g.
2.while:当……时候,是指一段短时间,表示主句和从句的动作同时发生,并持续一段时间,用进行时态：
e.g.I was reading while he was writing a letter.
He fell asleep while (he was)doing his homework.
3.until：表示直到……才(=till)
注意：当主句不是持续性动作时,需要使用否定形式not…until
e.g.I waited until he arrived.
I didn't fall asleep until I took some medicine.
4.as soon as:表示一…就
注意：当主句是将来时或祁使句时,由when,as soon as,before,until引导的时间状语从句用一般现在是代替将来时.
e.g.She began to read English as soon as she came to the classroom.
Please write to me as soon as you arrive in Beijing.
5.as:
1 、因为,用于句首.
2、像,不同于like,like是像但不是,而as,像就是
6.still:还,仍旧
e.g.Her grandmother is still living.

when,while ,until,till ,as soon as ,as ,after ,before,引导的时间状 when,while,as,as soon as,before,after,not……until这几个词有什么区别 while,when,until,after,before,as soon as 怎么用? when while before after as soon as until填空用when,while,as soon as,until,before,after填空如何区分when.while.as.before after.as soon as until时间状语从句的主句和从句选词填空 when while as soon as until before after 用since,as,when,as soon as,while,if,after,before,until或becaus 状语从句中“when while as soon as before”等引导词的区分. while,as soon as,when的区别 as soon as since when while区别 as soon as ,when,while 什么区别