高考经典必备 状语从句.docVIP

状语从句 在句子中起状语作用的从句叫做状语从句。状语从句可位于主句前（通常用逗号与主句隔开），也可位于主句之后（不需用逗号隔开）。状语从句可以表示时间、地点、原因、条件、让步、方式、比较、目的和结果等意义。不同的状语从句要求用不同的从属连词或相当于从属连词的词组引出。因此，掌握状语从句的关键是熟记引导各种状语从句的从属连词和词组。各种状语从句所用的从属连词和词组如下表所示： 状语从句 连接词 时间 when, while, as, as soon as, before, after, since, till, until, the moment, once, immediately 地点 where, wherever 原因 because, as, since, now that, for 条件 if, unless, as/so long as, on condition that, provided/providing that, in case 让步 though, although, even if, even though, as, no matter what/who/when…, whatever/whenever/however… 方式 as, as if, as though 目的 that, so that, in order that, lest, in case, for fear that 结果 so that, so…that, such…that 时间状语从句 引导时间状语从句的连词和词组有： as, as soon as, before, after, since, till, until, once, immediately(一…就), the moment(一…就), directly(一…就) immediately(一…就) when/while/as when:1）既可指时间段，又可指时间点； 2）从句谓语动词既可是延续性，又可是非延续性。 3）从句动作在主句动作之前，之后或同时。 while:1）仅可指时间段 2）强调主从句动作同时持续性进行，此时主从句的谓语必须是延续性动词。 3）主句的动作发生在从句动作进行过程中，主句动词是延续性动词。 as:1）主要指时间段，有时也可指时间点。 2）侧重表示两个动作同时发生，或一种动作随着另一种动作的变化而变化。例： 1) When/While/As I was walking down the street, I noticed a police car in front of No. 47. 2) When John arrived, I was cooking lunch. 3) While she sang, she danced. 4) While the child was playing with his toys, his parents were reading books. 5) They shouted slogans as they passed the square. 6) As/When he stood up, he dropped the glass.（时间点） 2．before/after before:引导的从句通常表示主句动作发生在从句动作之前。 从句是过去时，主句用过去完成时。 after:主句动作发生在从句动作之后。 主句是过去时，从句用过去完成时。例： 1) He had never heard English spoken before he went to London. After they had finished their work, they went home. 注：在带有before从句的主句中和在after从句中，也用一般过去时。这时或是因为所用的是状态动词，或是因为表示的是连续动作。例： 1) He did not know any English before he went to England.（状态动词， 不可用完成时） After she finished her work, she hurried to the nursery to pick up her child.（表连续动作；也可用过去完成时，不含连续意味） 高考连线一 I had just stepped out of the bathroom and was busily drying myself with a towel ____ I heard the steps. a. while b. when c. since d