(
课件网) parts of these sentences indicate the “time”. The moment I get the money I'll send the ticket. I was just getting into the bath when the telephone rang. He gets more attractive as he gets older. Whenever I go there they seem to be in bed. I've been very busy since I came back from holiday. 状语从句 状语从句在主从复合句中修饰主句中的动词，形容词或副词，按意义可分为时间、地点、原因、目的、结果、条件、方式、比较、让步等状语从句。从句可放在句首，也可放在句末。放在句首时，从句后面常用一个逗号，放在句末时，从句前一般不用逗号。本模块着重讲解时间状语从句。 时间状语从句： 引导时间状语从句的从属连词有：when, while, as, whenever, before, after, since, till, until, as soon as, once,the moment, immediately, no sooner…than, hardly…when, by the time, every time, last time…等。 （1）when, as, while （从属连词） when既可引导持续性动作，又可引导短暂性动作。它可以表示主句的动作和从句的动作同时发生，或从句的动作发生在主句动作之前。如： When I was a boy, I used to go to the seashore on Sundays.（同时） When the lesson was over, we began our writing.（从句动作在前） as引导持续性动作，侧重主句和从句的动作同时发生。 He hurried home, looking behind as he went. I saw your sister as she was getting on the bus yesterday. He sang as he walked. while指的是“在某一时间里”，“在……期间”，从句里的动作必须是持续性的，它也强调主句和从句动作的同时发生，往往侧重主句和从句动作的对比。 如：While he was in London, he studied music. While we were watching TV, he was writing a composition. 当when, as, while表示“在…一段时间里”，主从句的动作同时发生时，可以换用。如： While (When/As) we were discussing, Mr. Smith came in. *when 可表示“如果”。如： Don’t be afraid of asking for help_____ it is needed. (2003全国） A. Unless B. since C. although D. when *while可表示“虽然，尽管”。如： 1)____ modeling business is by no means easy to get into, the good model will always be in demand.(2004浙江） A. While B. Since C. As D. If * _____ I accept that he is not perfect, I do actually like the person. (2004江苏） A. While B. Since C. Before D. Unless when和while（并列连词） while表示对照的意思；when 表示“这时，突然……” I do every single bit of housework____ my husband Bob just does the dishes now and then.(2004广西） A. since B. while C. when D. as 2) He was about to tell me the secret____ someone patted him on the shoulder. (2002上海） A. as B. until C. while D. when 3) We were swimming in the lake ____ suddenly the storm started.(2004北京春） A. when B. while C. until D. before 4) Jasmine was holidaying with her family in a wildlife park____she was bitten on the leg by a lion. (2004上海） A. when B. while C. since D. before (2)till和until ①如果主句谓语动词是持续动词，通常用肯定式的主句，表示“直到……为止”。如： I worked till (until) he came back. 1) A good storyteller must be able to hold his listeners’ curiosity _____ he reaches the end of the story.(2003上海） A. when B. unless C. after D. until 2) We were told th ... ...
