状语从句

引导时间状语从句的词有：when、whenever、as、while、before、after、until、till、since、eversince、nowthat、once、so long.....as、as long as、as soon as等。

when表示正在这时、突然”，while引导时必定表示延续性的动作；

as引导时间状语从句表示同一个主语，They are talking as they are working;

before/after后不跟介词；

untile、till 同上用法；

eversince既可以跟介词，有可以跟连词;

now that(既然）表示原因从句；

*名词短语当做时间状语引导词相当于从属连词：

as soon as 等同于the instant、the moment、the minute、the second;

each time/every time/first time/last time;

the day/the month/the year you came here,the day you come here等同于when you come on the day.

where、wherever地点状语提前需带条件。

①becaues、as、since、nowthat、not that.....but that(不是因为...而是因为...)

②分词：seeing that、considering

③I'm glad that he has got a jod.

so that、in order that.

so that(后跟情态动词）、such...that,that.

If、unless、so long as、as long as、in case、so far as（就...而言）、on condition that.

though、although(后边永远不用倒装）、even if/though（可以倒装可以不倒装）、as引导让步状语从句必须倒装。

as....as,I ran as fast as you can.