Unit8GrammarA&B（过去进行时+when-while-as的用法）讲义 2022-2023学年牛津译林版英语八年级上册

8AUnit8GrammarA&B（过去进行时+when-while-as的用法） Grammar A---过去进行时(the Past continuous tense). “时态”表示一个动词在不同的时间内发生的动作或存在的状态，需要用不同的动词形式表示。在英语语法中，“时”指动作发生的时间，“态”指动作的样子和状态。下面来学习过去进行时的用法。 一、过去进行时的基本用法： 1、表示过去某一时刻正在进行的动作以及过去某一段时间内持续进行的动作。时间点可以用介词短语、副词或从句来表示。 A) 表示在过去某一个比较具体的时间正在发生的动作。如： (a)They were eating breakfast at 7:00 am yesterday.(介词短语表示时间点) (b) I was writing a letter at this time yesterday. (c) Five minutes ago, Danny was looking out of the window and Suzy was reading a book. (d)When I saw him, he was decorating his room. (when从句表示时间点) B) 在过去某段时间一直在进行的动作。如： (a) From 1983 to 1998, he was teaching at Yale. (b) They were building a dam last winter. (c) Mary was listening to light music 10 minutes ago.（10分钟前，玛丽正在听轻音乐。） 2、如果when, while这样的时间状语引导词所引导的主从句之一是一般过去时，则另一个句子常用过去进行时。如： I was washing my hair when you knocked at the front door.（你敲前门时我正在洗头发。） 3、 在复合句中，如果主要动作和背景动作都是延续的或同时发生的，那么主从句的动词都可用过去进行时。如： 　While he was waiting for the bus, he was reading a newspaper.他边等车边看报。 (两个动作都是延续的) 　He was cleaning his car while I was cooking. 他擦车时我在做饭。(两个动作同时进行) 4、通常不能用于过去进行时的动词主要有：agree, be, believe, belong, care, forget, hate, have(拥有), hear, know, like, love, mean, mind, notice, own, remember, seem, suppose, understand, want, wish等。如： 误：I was knowing the answer. 正：I knew the answer. 我知道答案。 　误：I wasn't understanding him. 　正：I didn't understand him. 我不明白他的意思。 二、过去进行时常用的时间状语： 1)then, at this/that time, at 9.00 last night …,when…, while, at ten o’clock yesterday 2) this morning, the whole day/morning, all day yesterday, from 8 to 10pm yesterday evening.…etc. 三、基本结构：was / were + verb-ing 动词ing形式的构成： 大多数动词 + ing think → thinking 以不发音e 结尾的动词 - e + ing take → taking 以ie 结尾的动词 -ie + y + ing lie → lying tie → tying die → dying 某些以“一个元音字母+ 一个辅音字母”结尾的动词 双写辅音字母+ ing run → running swim → swimming get → getting 写出下列动词的现在分词形式： read— play — dance — write — sit — get— have — eat —