as
as soon as as far as 区别？
soon as as far as 区别？
as far as的意思是：就……而言，远至……，就……。到……程度，……如：
Turn right at the first corner and keep.on as far as the cinema.
I will go with you as far as the school.
The teacher should encourage the students to proceed as far ad they can,and when they stuck,ask for help.
as soon as 一……就……
I will tell you about as soon as you come back.
as soon as 引导的时间状语从句和主句的时态要遵循“主将从现”规则。
since和as soon as的区别？
since是用于完成时,作“自从……”意思是有两种用法，1.例如：I have been a teacher since two years ago./ I was twenty./ I came here.（若要用动词，一定要用短动词的过去式)2.例如：It is/has been 2 years since I came here.(前面要用一段时间，后面用短动词的过去式)
as soon as 引导时间状语从句，表示“一……就……”。如果主句用将来时或情态动词或祈使句，从句必须用一般现在时代替将来时
when和as soon as的区别？
1. as soon as 引导的从句表示从句动作一发生，主句动作随即发生。通常译为“一…就…”
例如：
Come here as soon as you finish the work.
工作一结束你就到这里来.
2. when 表示某个具体的时间，所引导从句的动作是与主句的动作同时发生，或是先于主句动作。可指一段时间，也可指一点时间,既可表示一时性的动作，又可表示持续性的动作。
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.
3. while只能表示持续性的动作或状态，不能表示一时性或短暂性的动作。
例如：
One day while he was shopping in the supermarket,he saw his ex-wife with a man.
一天，他在超市购物时,他看到了他的前妻和一个男子在一起。