高中时间状语从句及练习(含答案).doc

状语从句 状语从句在句中作状语，修饰主句中的动词、形容词或副词等。状语从句放在主句之前时，常用逗号分开;放在主句之后，一般不用逗号。状语从句按其意义和作用可分为时间、原因、地点、条件、让步、目的、结果、方式、比较等9种。 1.时间状语从句 时间状语从句表示主句动作发生的时间，主要由when，while，as ; before, after; till (until); once, by the time, as soon as, no sooner ... than和hardly ... when及名词词组the moment等引导。 1) when“在……的时候”; while “在……期间”; as “正当……的时候” when意为“在……的时候”，强调“特定时间”。 When spring came, he felt like a trip. When he was eating his breakfast, he heard the doorbell ring. 说明：连词when在状语从句中还有如下几种含义： ①表示突然发生的事，含义为“（正在……时）忽然”。 I was just coming along to see you when I ran into Wilson. I had been working a couple of months when I had a letter from Jane. ②表示过早发生某事，意为“（还没……）就”。此含义有时可用before代替。 I hadn’t been reading for half an hour when I heard steps outside. 我刚读了不到半个小时就听到外面有脚步声。 I had been there little more than a week when I set to work in earnest. ③表示“在……的情况下”，常可译为“虽然”，“既然”，“如果”。 She refuses help when (although) she has many friends. Why do you walk when (since) you have a car? How can I help them to understand when (if) they won’t listen to me. ④后接虚拟结构，含义为“本可以，应该……”。 He stopped trying when he might have succeeded next time. They were playing when they could have been working. while意为“在……期间”，从句用持续性动词，表时间的一段，而不是一点。 While he was eating his breakfast, he heard the doorbell ring. We must strike while the iron is hot. 说明：连词while在状语从句中还有如下几种含义： ①意为“然而，但是”，表示前后对照，说明两种情况相反 Tom is very outgoing, while Jane is shy and quiet. Some people waste food while others haven’t enough. ②意为“虽然，尽管”（多放句首），从句和主句主语多为同一人或物。 While I understand what you say, I can’t agree with you. While forbidden fruit is said to taste sweeter, it usually spoils faster. 虽然有人说禁果的味道更甜，但它腐烂得也更快。 ③意为“只要”。参看while引导条件状语从句。 as意为“正当”，强调同一时间里两个相继发生或变化的情况，或两个动作一前一后，有时有“随着……”的含义。 As he was eating his breakfast, he heard the doorbell ring. (强调同一时间） As I was going out, it began to rain.(强调两个动作先后发生） As spring warms the good earth, all flowers begin to bloom. (as 有“随着”的含义） 2) before “在……之前”，after “在……之后