状语从句序号知识要点已掌握需巩固1as 引导从句时侧重主从句动作同时或几乎同时进行，从句的动作可以是持续性的，也可以是短暂的。意为”当……时，一边……一边，随着”。Sometimes I watch TV as I am having breakfast．They sang as they danced at the party.As the day went on, the weather got worse.注意：with 也有“随着”的意思，但它是介词，其后不能跟句子。2when 的用法（1）当(2)就在那时（3）在…情况下，既然(4)本该…而却when 常用于以下句型中：①…was/were doing…when…（正在做…这时） ②…was/were about to do…when…（正要做…这时）③…was/were on the point of doing…when…(刚要做…这时) ④…had just done…when….(刚一…就)⑤Hardly/Scarcely had…done…when…(刚一…就)3while 的用法(1)当，在…时候(主从句试题)(2)趁着(3)而(4)虽然（句首）4as 的用法(1)当，一边…一边(2)随着（3）因为，由于（4）像，按照（4）as…as (5)虽然（倒装结构）（6）定语从句中用法（见定语从句）5as 作“像’”按照、像”平衡句子结构用法：He sings well, as do many of his colleagues. 6It’s/ has been +段时间+since…did (动词为短暂性，句子是顺译及延续性时，句子是倒译)7It was +时间点+when…（当……的时候时间是） It was 5 am when we arrived at the village.It was/will be+时间段+before…(过了…才) It was/will be two weeks before we met/meet again.It is /has been +时间段+since…（自从…以来有…）8引导时间状语从句的名词性短语等：the day/week/year; the first time /last time/next time/every time/by the time…；immediately/directly/instantly+ 从 句 ;the moment/the instant/the minute+从句？hardly/scarcely/barely… when…; no sooner… than… hardly/scarcely…when, no sooner…than 这 一 结 构 的 时 态 搭 配 ：hardly/scarcely 与 no sooner 引导的句子谓语动词应用过去完成时，而when 与 than 引 导 的 句 子 谓 语 动 词 应 用 一 般 过 去 时 。 如 果 hardly, scarcely, no sooner 置于句首，句子必须用倒装结构。9not…until 还有强调式和倒装式： 强调句：It is not until he returns home that s...
