八年级英语下册Unit 3 What were you doing when the UFO arrived? 同步语法解析

概要：主句（一般过去时）+ while +从句（过去进行时）对于做题也是很有用的。 关于过去进行时的考查，总结常见题型如下： Ⅰ. 句型转换(1) We were listening to the teacher when she came in. (对划线部分提问)_____ _____ you _____ when she came in? (2) He does his homework every day. (用at this time yesterday改写句子)He ____ _____ his homework at this time yesterday.以上（1）小题是对过去进行时句式改变的练习，只需照以上讲解完成即可。(2)小题考察一般过去时与过去进行时的熟练转换。 Ⅱ. 用“when”与“while”完成句子。(1) _____ Tom was eating supper, it began to rain outside.(2) Don't use your cell phone _____

八年级英语下册Unit 3 What were you doing when the UFO arrived? 同步语法解析,标签：八年级英语教学设计模板,http://www.88haoxue.com
主句（一般过去时）+ while +从句（过去进行时）对于做题也是很有用的。   关于过去进行时的考查，总结常见题型如下：   Ⅰ. 句型转换 (1) We were listening to the teacher when she came in. (对划线部分提问) _____ _____ you _____ when she came in?  (2) He does his homework every day. (用at this time yesterday改写句子) He ____ _____ his homework at this time yesterday. 以上（1）小题是对过去进行时句式改变的练习，只需照以上讲解完成即可。(2)小题考察一般过去时与过去进行时的熟练转换。   Ⅱ. 用“when”与“while”完成句子。 (1) _____ Tom was eating supper, it began to rain outside. (2) Don't use your cell phone _____ you are driving a car. (3) What were you doing _____ Mr. Zhou came in? (4) Jim is good at math _____ Mary is good at English. (5) We were watching TV_____ the electricity was off. 对于以上题目，同学们只要掌握“when”与“while”引导的时间状语从句主从句所用的时态就可以了。对于其他的用法我们将到九年级去学。   Ⅲ. 单项选择 (1) I first met Lisa three years ago. She ___ at a radio shop at the time. A. has worked                B. was working C. had been working        D. had worked (2) My mother was reading while I ___ the music. A. listened to     B. listened     C. was listening to     D. is listening to (3) I ___ my breakfast when the morning post came.   A. had                           B. had been having C. have been having        D. was having (4) When I arrived at his office, he ___ on the phone. A. was speaking              B. spoke C. had been speaking       D. had spoken 在以上题目中，（1）题考察在过去某一时刻发生的动作，即用过去进行时。（2）题考察while引导的时间状语从句两个动作同时发生，都用过去进行时。（3）（4）题考察when引导的时间状语从句，主句用过去进行时，从句用一般过去式。其他无须多考虑，从句，主句用过去进行时。   Ⅳ. 汉译英 (1) Lucy 和Lily昨天下午从3点到4点在游泳。 Lucy and Lily ______ ________ from 3:00 to 4:00 yesterday afternoon. (2) 当Mr Cook到家时，他正在听收音机。 When Mr Cook got home, his son ______ ______ to the radio (3) 当李雷在吃早饭时，吉姆进来了。 While Li Lei ______ ______________, Jim came in.   【错例探究】  在平时训练中，同学们的易错点在“when”与“while”的选择运用上，经常把它们两个所引导的时间状语从句的主从句的时态搞错，再就是把一般过去时与过去进行时混淆，如以下所示：   (1)The boy with his parents _____when the earthquake rocked their city. A. were sleeping     B. is asleep     C. was sleeping     D. are asleep 本题易错点之一在于介词“with”的用法掌握较差。A with B的谓语动词应与A 一致，为单数形式；易错点之二在于没有遵循“when”引导的时间状语从句的主句用过去进行时从句用一般过去时。因此正确答案为C。     (2) The policewoman asked the man ___ at 9:00 o'clock last night.

www.88haoxue.com A. what is he doing         B. what he is doing   C. what was he doing      D. what he was doing 根据题意同学们都能够知道用过去进行时，但本题易错点在从句为特殊疑问句时，引导词为特殊疑问词，其后应该是陈述句的语序，绝大多数学生都忽略了这一点，致使失分严重。所以正确答案应为D。   (3) When you_______ (konck) at the door yesterday, I_________ (do) some washing. 本题关键要弄清“when”与“while”后所跟的动词。“when”既可接时间点也可接时间段，“when”引导的时间状语从句中的动词可以是终止性动词，也可以是延续性动词，所以主句用过去进行时，从句应用一般过去时；“when”从句中的动作既可以与主句的动作同时发生，又可在主句的动作之前或之后发生。而“while”接一段时间，从句中的动作必须是延续性动词，从句中的动作与主句中的动作同时发生，主从句都用过去进行时的多。所以正确答案为：knocked; was doing.   附：【用法点拨】练习答案 句型转换： (1)What were; doing   (2)was doing 用“when”与“while”完成句子： (1) while   (2) while   (3) when   (4) while   (5) when  单项选择： (1) B   (2) C  (3) D  (4) A 汉译英： (1) were swimming   (2) was listening   (3) was having breakfast

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