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第十节 状语从句 考点一 时间状语从句 1．when引导时间状语从句，意为“正在这时”，表示某件事正发生或刚刚发生时，突然发生另一动作。when构成的相关句型如下： Tom was about to close the window when his attention was caught by a bird. 汤姆正要关窗户，这时他的注意力被一只鸟吸引住了。 [名师点津] “一……就……”的表达如下表： 词类 常用词 例句 从属连词 as soon as He started as soon as he received the news. 副词 immediately，directly，instantly They phoned immediately they reached home. 名词/名词短语 the minute/moment/ second/instant，every/each time They ran away the moment they saw the guard.Each time I was in trouble，he would stand by. 句型结构 no sooner ...than ...，hardly/scarcely ...when ... No sooner had I arrived home than it began to rain. 2.before (1)表示“还未……就……；不到……就……；……才……；趁……；还没来得及……就……”。 The girl had hardly rung the bell before the door was opened suddenly，and her friend rushed out to greet her. 小女孩还没来得及按门铃，门就突然开了，她的朋友冲出来欢迎她。 | 
