过去进行时(8年级Unit1).docVIP

过去进行时 构成方法：过去进行时由was/were加现在分词构成。 过去进行时的概念及用法 概念：表示过去某一时刻里或过去某一段时间里正在发生的动作 例如：I was singing a song at that time. He is doing his homework at 9:00 yesterday. 过去进行时的用法及常用时间状语 表示过去某一时刻正在进行的动作，常与时间状语例如：this time yesterday, at that time , then, at 10:00 yesterday 等连用。 ------What were you doing this time yesterday? ------ I was watching TV. 2.表示过去某一时刻正在进行的动作,常与when 引导时间状语从句连用，例如： What were you doing when the UFO arrived? I was walking along the stream when I met my teacher of English. 3表示过去某段时间发生的动作和状态，可以用while 引导的时间状语连用，例如： While I was watering the garden, it began to rain. While we were having a party, the lights went out. *注意： A．在when引导的时间状语从句中，过去进行时可能出现在从句，也可能出现在主句。 例如: When she was playing football, her mother came home. When the watch began, he was doing his homework. B.在while引导的时间状语从句中，从句时过去进行时，主句是一般过去时或者过去进行时。 例如： While Lucy was singing , Tom was dancing. While she was washing her clothes, the light went out. 过去进行时的构成：过去进行时由be动词was/were +doing的形式构成 be动词was/were 有人称和数的变化：第一、三人称单数用was 第二人称用were ；单数名词用was，复数名词用 were. Doing 的变化 一般直接在动词的末尾加上ing, 例:study------studying; help-----helping ;sing------singing (2)以e结尾的动词，将e去掉，再加ing 例：live-----living; dance----dancing; write-----writing (3).在重读闭音节中，中间只有一个元音字母，且末尾只有1个辅音字母，要双写辅音字母+ing ，例：sit---sitting （4）以 ie结尾变 ie为 y+ing 例：die-----dying lie---lying （5）结尾为c，且 c读 /k/ 时，在结尾加k再加ing, 如 picnic----picnicking 四．句型转换 1．肯定句：主语+was/were 动词的ing 例如：He was walking on the way home this time yesterday. 2.否定句：在be动词was/were后面加not,即：主语+wasn’t/weren’t+动词的ing 例如：He wasn’t walking on the way home this time yesterday. 一般疑问句及回答：将be动词was/were提前，其余不变 句型：Was/Were+主语+动词的ing 肯定回答：Yes,主语+was/were. 否定回答： No,主语wasn’t/ weren’t. 例如：Was he walking on the way home this time yesterday? Yes, he was. No, he wasn’t. 4.特殊疑问句：特殊疑问词+一般疑问句 句型：特殊疑问词+was/ were+主语+动词 ing 例： Why was he walking on the way home this time yesterday? 5.反义疑问句： 句型：原句，wasn’t /weren’t +主语？ He was walking on the way home this time yesterday, wasn’t he? 过去