5.2【核心句式】-2021-2022学年八年级英语下册链接教材精准变式练（人教版）

Unit 5 What were you doing when the rainstorm came? ( 教材 核心句式 知识链接 及典例解读 ) when与while 引导的时间状语从句 【教材原句】 ①When he woke up,the sun was rising.当他醒来时,太阳正在升起。 ②So while you were sleeping,I called Jenny and she helped me.所以,当你睡觉的时候,我给珍妮打了电话,她帮助了我。 1.when 和while都可引导时间状语从句,通常情况下可互换。 2.以下情况不可互换 ①when 引导的时间状语从句既可指时间点,也可指时间段;while引导的时间状语从句只指时间段; ②含有when引导的时间状语从句的主从复合句中主从句的动作可以是同时发生,也可以是先后发生;含有 while引导的时间状语从句的主从复合句则强调主从句动作同时发生,或主句的动作在从句的动作发生过程中发生; ③含when引导的时间状语从句的主从复合句中,主句用过去进行时,从句用一般过去时;含while 引导的时间状语从句的主从复合句中,主从句表示的动作可同时发生,且时态都用过去进行时。 He was nine when he went abroad.他出国的时候9岁。 They arrived while we were having dinner.他们来时我们正在吃晚饭。 典例 Tony was sleeping his mother was doing the housework. A.whether B.for C.while D.until 【解析】根据题干可知,空前后均为完整的句子且时态都是过去进行时;强调两个动作同时发生时,应用 while. 【答案】C 一、单项选择 1.Leonard was nine _his father died. A.when B.because C.though D.until 2.When you _ at the door, I _ TV with my parents. A.knocked; watched B.was knocking; watched C.knocked; was watching D.knock; am watching 3.I was doing my homework _ my brother came into my room. A.after B.until C.when D.as soon as 4._ I got home, I found my father was watching TV. A.When B.Before C.Since D.If 5.He is going to _ a pianist when he _ up. A.do, grow B.do, grows C.be, grow D.be, grows 6.My mother was cooking _ my father was reading a newspaper at eight o’clock last night. A.while B.since C.before D.because 7.—What were you and your father doing at 7:00 yesterday evening? —I was doing my homework _ my father was watching news on TV. A.when B.as soon as C.while D.where 8.Mandy was playing the piano _ Lisa was reading a book. A.before B.after C.while D.until 9.Tom helped me do the housework _ you were sleeping. A.unless B.while C.what D.until 10.Mandy was playing the piano _ Lisa was reading a book. A.before B.after C.while D.until 11.Ben was reading a magazine _ his sister was studying for her test. A.while B.after C.because 12.It was raining heavily _ we were playing football. A.when B.while C.as 13.While Mike _ a co