Module 2 Public holidays
模块语法小专题 语法精讲 状语从句(Ⅰ)
时间状语从句 I will call you as soon as I arrive in Beijing.在复合句中起时间状语作用的句子称为时间状语我一到达北京就给你打电话。 从句。在此主要学习由while，when，as，before，after，4．until引导时间状语从句 as soon as，until，since引导的时间状语从句。其具until意为“直到……”，引导的时间状语从句中体用法如下： 主从句都是肯定句，主句的谓语动词为持续性动词时，
1．when，while，as引导的时间状语从句 until相当于till。not…until 意为“直到……从属连词when，while，as 都可引导时间状语从句，才……”，主句的谓语动词一般为非持续性动词。 意为“当……时候”；但用法上又有所不同。 (1)when用法最广，常可代替while 与as。与while相比，when 引导的从句中动词既可以是延续性的，也可以是短暂性的。as在这一点上与when 相同，while 所引导的从句中，动词只能是延续性的。如： The telephone rang while I was taking a bath.我在洗澡时电话响了。 (2)当两个表示时间延续的动词同时发生而又具有对比意味时用while，在这样的复合句中，主从句的时态通常是相同的。如： My father was preparing a report while I was playing computer games.我玩电子游戏的时候我爸爸正在准备报告。 (3)表示两个发展变化中的情况时常用as。如： As you grow older，you'll know better and better about yourself.随着你慢慢长大，你会对自己越来越了解。 (4)表示“一边……一边……”时，用as。如： The girl said hello to me as she was walking.那个女孩一边行走一边向我问好。 (5)表示随着短暂动作的发生，另一行为伴随发生，这时常用as。如： My cap was blown away as I stood up.当我起立的时候帽子被吹走了。 2．before与after引导的时间状语从句 before意为“在……之前”，引导的时间状语从句表示主句的动作发生在从句动作之前；after意为“在……之后”，引导的时间状语从句表示主句的动作发生在从句动作之后。如： We cleaned the classroom before we left school yesterday.昨天我们离校之前打扫了教室。 He called me after he finished his homework.他完成作业之后给我打了电话。 3．as soon as引导的时间状语从句 as soon as意为“一……就……”，引导的时间状语从句中主句为一般将来时时，从句要用一般现在时。如： 5．since 引导的时间状语从句
since意为“自从……以来”，其引导时间状语从句的用法主要有两种： (1)主句(现在完成时)＋since时间状语从句(一般过去时)。如：
He hasn't been home since he graduated.他毕业后没回过家。
(2)It be＋一段时间＋since时间状语从句。如： It is two years since I became a postgraduate student.我成为研究生已经有两年了。语法精练
Ⅰ.用适当的表示时间的从属连词填空。 1．When the fire took place，all the students were sleeping.
2．My brother was preparing a report while I was reading. 3．I didn't know English before I came here. 4. After he locked the door，he left.
5．I'll come to see you as__soon__as I arrive there. 6．They worked until/till it was dark.
7．I didn't go to bed until my father came back. 8．Be quiet while/when I was writing a letter.
9．I'll return the book as__soon__as I finish it.
10．When I was a child，I used to go to the Great Wall. Ⅱ.根据汉语意思完成句子，每空一词。 11．直到他问我我才告诉他整件事情。 I didn't tell him the whole thing until he asked
me about it. 12．约翰完成作业后就上床睡觉了。
John went to bed after he finished his homework.
13．我出国之前拜访了我的老师。 I visited my teacher before I went abroad. 14．我们到达时在下雨。 It was raining when we arrived.
15．他一回来我就告诉他这件事。
I'll tell him about it as soon as he comes back.