人教版八年级英语下册Unit 5 What were you doing when the rainstorm came? Section A 3 Grammar focus - 4c课件28张

课件28张PPT。Unit 5 What were you doing when the rainstorm came? Section A 3 Grammar focus - 4c Objectives1 . Review the Past Progressive Tense 2.了解when和while的用法及区别。What was he doing at 7:30 this morning?He ____ _____ _____ at 7:30 this morning.was cooking breakfastOne pointWhat were they doing from 8 to 9 last night?They_____ from 8 to 9 last night.were talking on the phoneOne pointWhen I …He was doing …When I called him up, he was sleeping.Make up the sentences.While I …He was doing …While I walked to school, he was eating.When I …He was doing …When I read the newspaper, he was watching TV. What were you doing at eight last night? I was taking a shower.What was she doing at the time of the rainstorm? She was doing her homework.读下列句子, 你能总结出句子中包含的语法吗？What was he doing when the rainstorm came? He was reading in the library when the rainstorm came.What was Ben doing when it began to rain heavily? When it began to rain, Ben was helping his mom make dinner.What was Jenny doing while Linda was sleeping? While Linda was sleeping, Jenny was helping Mary with her homework. when和while都可表示“当……的时候”，引导时间状语从句。你知道两者在过去进行时中的用法有什么不同吗？ 请仔细观察下面的例句，然后补全空格中的内容。Presentation过去进行时中的when和while 主句的动作是持续性的，而从句动作是 短暂性的，此时用 _____ 引导时间状语从 句，主句用 _____ 时态，从句用一般 过去时态。 ① I was walking to school when I saw a cat in a tree. ②When Sally arrived home, her mother was cleaning the house. 过去进行when③ While I was sleeping in the bedroom, someone knocked at the door. ④ David fell while he was riding his bike. 主句的动作是短暂性的，从句的动作 是持续性的，此时用 _____ 引导从 句，主句用 _____ 时态，从句 用过去进行时态。一般过去while⑤ While Andy was waiting for the bus, he was reading a newspaper. ⑥ He was cleaning his car while I was cooking. 主句和从句的动作在过去的某时刻或某 段时间同时发生，而且动作都是持续性 的，此时用 _____ 引导从句，而且主 句和从句都用 _____ 时态。过去进行while?1) when可指时间点, 又可指时间段, 从句中 可用延续性动词, 也可用非延续性动词。 ?2) while总是指一个时间段, 从句中必须用延 续性动词。Summary:4aLook at the table and write sentences with both while and when.Exercise1. While John was taking photos, Mary bought a drink. John was taking photos when Mary bought a drink. 2. While John was playing the piano, Mary left the house. John was playing the piano when Mary left the house.3. While John was cleaning his room, Mary turned on the radio. John was cleaning his room when Mary turned on the radio. 4. While John was shopping, Mary took the car to the car wash. John was shopping when Mary took the car to the car wash.Fill in the blanks with was, were, when or while.At 7:00 a.m., I woke up. _____I ____making my breakfast, my brother_____ listening to the radio. _____I was eating, the radio news talked about a car accident near our home. My brother and I went out right away to have a look. _____we got to the p ... ...