Module2时间状语从句及专项练习.2022-2023学年外研版英语八年级上册

M2时间状语从句讲解及专项练习 时间状语从句 1.when意为“当......时候”，引导的时间状语从句 1）主句的动作和从句的动作可以同时发生，也可以先后发生 I feel happy when you come to see me. 当你们来看我时，我感到很高兴。 2）when引导的时间状语从句中的动词可以延续也可以不延续 Someone knocked at the door when I was sleeping. (延续性动词) 当我正在睡觉时，有人敲门。 I shall tell her the good news when she comes. (非延续性动词) 她来时，我将告诉她这个好消息。 3）表示突然发生的事（be doing......when 正在......突然......） I was fishing by the river when someone called for help. 我正在河边钓鱼，突然有人求救。 2.while意为“当......时候， 在......期间”，引导时间状语从句 1）while引导的时间状语从句中的动词要用延续性动词或表示状态的词，并且延续性动词要用进行时态 They rushed in while we were discussing problems. 当我们在讨论问题时，他们冲了进来。 2)主句和从句中的两个动作同时发生 My father was cleaning the car while I was playing games. 当我正在玩游戏时，爸爸正在洗车。 3.since意为“自从”，引导时间状语从句 1）主句一般用现在完成时，从句用一般过去时 He has made great progress in his studies since he met this good friend. 自从遇见了这个好朋友，他已在学习上取得了巨大的进步 4.as soon as意为“一......就......”,引导时间状语从句，表示从句的动作一发生， 主句的动作就随着发生，遵循“主将从现”的原则。 As soon as he arrives, I’ll tell him.他一到，我就告诉他。 5.before 意为“在......之前”， 引导时间状语从句，表示主句的动作发生在从句动作之前 I didn’t know any English before I came here. 我到这儿来之前，一点英语都不懂。 6.after意为“在......之后”，引导时间状语从句，表示主句的动作发生在从句的动作之后 After he locked the door, he left. 他锁上门后离开了。 7.until意为“直到......为止”，引导时间状语从句，主句和从句都用肯定式，并且主句的谓语动词为延续性动词 You may stay here until the rain stops. 你可以待在这里一直到雨停。 1）not...until...意为“直到......才......”, 主句谓语动词为非延续性动词 He didn’t go to bed until he had finished his work. 他直到完成工作才去睡觉。 ►注意当主句是一般将来时态，when, as soon as, after, until等引导的时间状语从句通常用一般现在时表将来。 I will give the book to her when she comes. 在时间状语从句中，当主句的主语和从句的主语一样时，并且从句中有be动词时，可以省略从句中的主语和be动词。 She fell asleep while (she was) doing her homework. 【即学即练】 一、填入适当的连词。 1.He had learned Chinese _________ he came to China. 2.I haven't seen him _________ he moved to the other side of the town. 3. I waited ________ he came back. 4. She likes everything to be in place ________ she starts to work. 5.__________ I get to the airport, I will phone you to pick me up. 6.I like playing tennis _________ my younger sister prefers watching ball g