(
课件网) 【知识精讲】时间状语从句 初三 英语 发布课文朗读任务 （任务-发布任务-自定义任务） 条件状语从句 时间状语从句 状语从句 原因状语从句 目的状语从句 结果状语从句 地点状语从句 让步状语从句 方式状语从句 时间状语从句的定义： 用表示时间的连词连接一个句子作状语，这样的句子就是时间状语从句。 连接时间状语从句的连接词有： when, while, as, before, after, as soon as, until, since... after/before的用法： after：在……之后 如：I arrived after he left. before：在……之前 如：You need to get out of here before you get into trouble. when的用法 when引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词，但大多是瞬时动词。表示带有规律性的“每当”或当主、从句谓语动词的动作发生有先后时用引导词when。When引导的时间状语从句用的最多的是一般过去时，而主句的时态没有限制，根据具体情况而定。 如：It was raining when we arrived. while的用法 while搭配持续状态 持续状态=进行时/延续性状态 如：He fell asleep while he was doing his homework. I learned Spanish while I was in Mexico. as的用法 as从句表示的也是一件事情正在发生，另一件事也正在进行当中。但与while从句不同的是，as从句一般不用正在进行时，而只是一般过去时。as 从句一般可以翻译成“边……边……”。 如：We always sing as we walk. 我们总是边走边唱。 As we was going out, it began to snow. 当我们出门时，开始下雪了。 as soon as 的用法 as soon as：一……就…… 如：During summer holidays, I often get up as soon as the sun begins to come through my window. since的用法 since：自从 如：He has had two jobs since he graduated. 主句：现在完成时，since+一般过去时 until/till的用法 “until/till直到” 在肯定句中通常只用延续性动词；在否定句中通常用非延续性动词，意为“直到……才”。 如：I didn’t realize he was a foreigner until he started speaking. The letter passed from one to another until everyone had read it. by the time的用法 by the time：到……时候 如：By the time my hair reaches my waist, will you be back By the time the war was over, death and suffering were to be seen everywhere. 时间状语从句：主将从现 要注意when, while, as, after, before, as soon as, since, till /until, by the time引导的时间状语从句中的时态。一般情况下主句是将来时的时候，从句不能用将来时，要用一般现在时。 如：I’ll tell him the bad news when I see him. My husband and I will have saved enough money to buy a house by the time I turn 30 years old. 单项填空 _____ the rain stops, we’ll set off for the station. A. Before B. As soon as C. Unless D. Though 单项填空 _____ the rain stops, we’ll set off for the station. A. Before B. As soon as C. Unless D. Though 答案：B 单项选择 I _____ go to bed until my father _____ back. A. will; comes B. won't; comes C. will; will come D. won't; will come 单项选择 I _____ go to bed until my father _____ back. A. will; comes B. won't; comes C. will; will come D. won't; will come 答案：B ... ...
