一轮复习讲义状语从句1.doc

高三英语一轮复习讲义 状语从句 状语从句在高考试题中由于其他从句的干扰，以及倒装句，强调句的介入，使得状语从句更为复杂。状语从句是一种副词性从句，通常由一个从属连词或一个起连词作用的词组引导。 1. 时间状语从句 常见的连词(组)： when, while, as, before, after, once, till, until, as soon as, hardly ...when, scarcely ...when, no sooner ...than等。 可以引导时间状语从句的副（介）词（短语）或名词短语： directly, instantly, immediately, the moment,the minute, the instant, by the time, every time, each time, next time, the last time等。 注意点如下： (1) when, while, as引导的时间状语从句 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。when(at or during the time)既可以表示在某一点的时候，又可以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。while强调一段时间，仅表示从句和主句的动作同时发生，并且有延续意义，该从句中的动词一般要用延续性动词，从句中常用过去进行时态或一般过去时态；当when表示a period of time时，两者可以互换。 She came up as I was cooking.(同时) As time goes by, ......(随着) She sang as she walked. When we were at school, we went to the library every day.(在一段时间内) Be doing when… Be on the point of doing when… Be about to do when… Be going to do when… Had done when… She was about to leave when the phone rang. While they were watching TV, I was preparing myself for the coming examination. 他们在看电视，而我在为即将到来的考试做准备。 Strike while the iron is hot. ( 不可用as或when，这里的while意思是“趁……”) (2) before引导状语从句时的常见重点句型 ①It will/would be +段时间 +before ... 还要……才会…… It was +段时间 +before ... 过了……才…… It will be about one month before we have an exam. It was a long time before I got to sleep. It wasnt long before he told me about the news. ② 不等……就……； 在……之前就…… The telephone rang off before I could answer it. ③ 刚……就…… He had hardly entered the room before/when he heard the telephone ring.= Hardly had he entered …. ④ 先……再…… You can have a few days to think about it before you make your decision. (3)since 引导的从句用动词的过去式（包括过去完成时) He has never been to see me since I was ill./since I fell ill. I havent heard from him since he lived here. 重点句型 It is /has been +段时间 +since ...... It is two years sine he lived here. (4) till, until I w