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课件网) Unit 5 What were you doing when the rainstorm came？ Section A Grammar Focus-4c 最新人教版八年级英语下册 At 10:00 a.m. on that day, many people were going to a concert. ·What was she doing when the rainstorm came She was riding a bicycle when the rainstorm came. What were they doing when the rainstorm came They were helping some people in danger when the rainstorm came. What was he doing when the rainstorm came He was reporting the news when the rainstorm came. 二、连词when和while的用法 1.相同之处：两者都表示“当……时候”。 2.不同之处： (1)when的英文释义是“at or during the time that …”， 它既指时间点，也指时间段；while的英文释义是“during the time that …”，只表示时间段。在when引导的时间状语从句中，动词可以是瞬间性动词，也可以是延续性动词；而在while引导的从句中，动词必须是延续性动词。例如： It was snowing when we arrived at the station. The light went out when we were having dinner. While she was typing， someone knocked at the door. 【注意】 ①延续性动词表示能够延续或产生持久影响的动作。例如：learn， work， stand， lie， walk， keep， have， wait，watch等。 ②瞬间性动词表示不能延续的动作，这种动作发生后立即结束。例如：open， close， finish，begin， come， go， arrive， reach， get to， leave， borrow， buy等。 (2)在when引导的时间状语从句中，从句的动作和主句的动作可以是同时发生，也可以是先后发生。while引导的时间状语从句则强调主句的动作在从句动作发生的过程中发生或主从句两个动作同时发生。例如： He finally fell asleep when / while the wind was dying down. They were singing while we were dancing. 过去进行时 现在进行时 含义： 关键词： 结构： 例句： 表示现在 正在发生、进行 的动作。 now / look、listen. 主+is/am/are + doing I am having an English class now. 含义： 关键词： 结构： 例句： 表示过去 正在发生、进行 的动作。 主+ + doing was / were play soccer do some reading play tennis —What is he doing now Warming -up 否定句： 一般疑问句： Is he playing tennis He isn’t playing tennis. Yes ,he is. No ,he isn’t. any —He is playing tennis. she have a party dance boat on the sea —What are they doing now They aren’t boating on the sea. 否定句： 一般疑问句： Are they boating on the sea Yes ,they are. No ,they aren’t. —They are boating on the sea. 一、过去进行时 1.概念：表示过去某一时刻或某一阶段正在进行或发生的动作。例如： I was practising the piano at 8:00 yesterday evening. 2.基本结构：主语+was / were+动词-ing+其他成分. 3.句中常见的时间标志词：then， at that time， at this time，yesterday， when， while等。例如： My children were doing their homework at that time. When I came in， my father was watching TV. Look at the table and write sentences with both while and when. John Mary take photos buy a drink play the piano leave the house clean his room turn on the radio shop take the car to the car wash 活学活用 4a 1. 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 playi ... ...
