Unit 5 SectionA Grammar Focus-3c 课件 2023-2024学年人教版英语八年级下册

Unit 5 What were you doing when the rainstorm came? 人教版八年级英语下册 Section A Grammar Focus-4c Fill in the blanks with “be”. 1. I _____ 16 years old this year. 2. I _____ 15 years old last year. 3. How _____ the weather today? 4. How _____ the weather yesterday? 5. They _____ good friends. 6. They _____ good friends three years ago. am was is was are were Revision 2 2 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. What was he doing when the rainstorm came? He was reading in the library when the rainstorm came. Grammar Focus 过去进行时 3 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与while引导的时间状语从句 一、 过去进行时 1. 概念: 表示过去某一时刻或某段时间内正进行 的动作。 2. 构成: was/were + 动词现在分词 3. 用法: a: 表示某一时刻正进行的行为，与特定的过去 时间状语连用，常见的时间有: at 8 last night, at this time, at that time, at that moment 等 过去进行时 含义: 表示过去某个时刻 正在进行的动作。 结构： was/were + doing 例句： I was having an English class at this time yesterday. 现在进行时 含义: 表示现在正在进行 的动作。 结构： is/am/are + doing 例句： I am having an English class. 现在进行时和过去进行时的区别 二、when与while引导的时间状语从句 相同点：when和while均可作连词，意为“当……的时候”，引导时间状语从句。 1. when的用法 (1) 指时间点，也可指时间段，其从句的谓语动词 既可以是延续性的，也可以是非延续性的。 例句：当交通灯是绿色的时候，你可以过马路。 You can walk across the street when traffic lights are green. 延续性动词指动作可以延续一段时间, 而不 是瞬间结束。    如: work、study、drink、eat等。 非延续性动词指动作极为短暂，瞬间结束。 如: start、begin、hit、jump、knock等。 when后面可接短暂性动作和延续性动作 while只能接延续性动作 (2) 引导的从句的谓语动作既可与主句谓语动作同时发 生，也可以是之前或之后发生。 例句：迈克给我打电话时，我正在跟乔讨论一道数 学题。 I was discussing a math problem with Joe when Mike called me up. (3) 若主句是一般将来时，从句用一般现在时表示将来。 例句：我到了上海会给你打电话。 I’ll call you when I arrive in Shanghai.