[外语课件]状语从句2010.ppt

Adverbial Clause Definition: 状语从句也叫副词性从句，用于修饰动词，表示动作发生的时间，地点，原因，条件，方式，目的，结果，还可以表示比较和让步的关系，据此分为九类。 主将从现 Don’t get off the bus until it ____________ (stop). Unless he _______ (get) finance, he’ll have to close the branch offices. Whoever/ No matter who ________ (come) last, he will be punished. 到他明年毕业的时候，他学习英语满8年了。(By the time…) 时间状语从句 Before的用法 It will be long/时间 before 要过很久才会 It won’t be long before 要不了多久就会… It was long/时间 before 过了很久才… It wasn’t long before 没过多久就… *只有两种时态：一般将来和一般过去 Before: 没来得及…就…; 不知不觉： They left before we could say goodbye. Three hours had passed before we knew it. Exe: He almost knocked me down before he saw me. After he finished the task, he went home. I heard that it won’t be long before you leave for France. It will be five years before he comes back from Britain. It was 8 years before the anti-Japanese war won. When/ As/ While When=just at that time,“这时，突然…” sb. was doing…when sb. was about to do…when sb. had(not) done …when Exe: I was doing my homework when the telephone rang. I was about to go out when it began to rain. I had just had dinner when he came. I hadn’t walked long when he caught up with me. When/ As/ While As+ sb. be doing，表示“正当…”while 表示“随着…” 随着经济的发展，上海涌现出很多摩天大楼。(As…; spring) As the economy develops, many skyscrapers have sprung up in Shanghai. 表示“一边…一边..” 常用一般过去时态。 他边走边唱。(as) He sang as he walked. When/ As/ While 表示“正当”，即可以+be doing；又可以+其他表状态的词(be away/ out/ there) 仅位于句首，=although，表“虽然，尽管” 表“而”，用于对比，放两个句子中间，作并列连词 Motion is absolute while stagnation is relative.运动是绝对的，而静止是相对的。 4. 表示“趁着…” Strike while the iron is hot. Exe: Please don’t talk so loud while others are reading. While John was staying in Shanghai, he picked up some Shanghai dialect. Would you please water the flowers while I am away/ not at home/ on business? While I am willing to help, I don’t have much time. While I admit the problem is very difficult, it isn’t beyond you. Till和Until Till一般不放在句首。 Until you told me, … *till和until表示的是一段时间“到…为止”，所以如果是瞬间动