高中状语从句语法及例句.docxVIP

状语从句 状语从句在高考试题中加上其它从句的干扰，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 由下列连词引导：when, while , as, before, after, once, till, until, once, as soon as, now that, hardly…when, scarcely…when, no sooner…than,有一些表示时间的副词（短语）或名词短语也可引导时间状语从句。如：directly, instantly, immediately, by the time，the moment, the second, the minute, the instant, 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。 ①She came up as I was cooking.(同时) ② When I was walking down the street, I came across an old friend of mine.我在街上行走时，碰到一位老朋友 when(at or during the time that )既可以表示在某一点的时候，又可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。 ①It was raining when we arrived.(指时间点) ②When we were at school, we went to the library every day.(在一段时间内) ③When we arrived there, the film had already begun.(先后发生) While强调一段时间里，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；在when表示a period of time时，两者可以互换。 ①Please don’t talk so loud while/when others are working. 其他人工作时请不要大声讲话。 ②He fell asleep while/when reading. 读书时他睡着了。 ③ 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……”) as表示主从句动作同时发生，所以常译作＂一边…一边＂。 John sings as he works. As his hands dropped he dropped with it, and I laid him down ,dead. 当When引出的时间状语从句为系表结构，而且其主语和主句的主语一致，其表语又是一个名词时，就可以用 as 引导的省略句来代替。 When he was a young man (= As a young man ) he was fond of hunting. 2)before状语从句的重点句型 ? It will (not ) be a period of time????before??还要……才，要不了多久就…… ???was (not)?????????????????????????????????过了……才, 没多久就…… ①It was a long time before I got to sleep . 过了好长时间我才睡着了。 ② It wasn’t long before he told me about the news.???没多久他就告诉了我那条新闻。 ③不等……就??在---之前：Before I could get in a word, he had measured me. ???The telephone rang off??before I could answer it.??我还没来得及接电话，电话就挂断了。 ④刚……就：He hardly entered the room before he heard the telephone ring. ⑤先……再：You can have a