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课件网) Unit 5 Unit 5 What were you doing when the rainstorm came Section A 3 Grammar focus-4c To learn to use Past Progressive Tense V-ing To learn to tell the differences between Present Progressive Tense and Past Progressive Tense To learn to summarize the usages of when/ while 1. 构成及用法 过去进行时由“was / were +v-ing”构成，表示在过去某一时刻或某一段时间正在进行的动作。 过去进行时 At 12:00 last night, someone knocked（敲）at my door. But when I opened the door, no one was there... 时间点 It wasn’t me. _____ at that time. I was reading a book At 12:00 last night, someone knocked（敲）at my door. But when I opened the door, no one was there... 时间点 It wasn’t me. _____ then. I was doing homework At 12:00 last night, someone knocked（敲）at my door. But when I opened the door, no one was there... 时间段 It wasn’t me. _____from 11:00 to 6:00 last night. I was sleeping 1. 构成及用法 过去进行时由“was / were +动词-ing”构成，表示在过去某一时刻或某一段时间正在进行的动作。 过去进行时 I was doing my homework at six yesterday evening. Mike and his brother were playing soccer from three to four yesterday afternoon 肯定句： 主语+was/were+动词-ing (+其他). e.g. I was swimming at that time. They were eating the cake at that time. 否定句: 主语+wasn’t/weren’t +动词-ing (+其他). e.g. They weren’t listening to music at ten yesterday morning. 2. 句式 疑问句: Was / Were+主语+动词-ing (+其他) 其肯定回答为：Yes, 主语(人称代词)+ was / were.； 否定回答为：No, 主语(人称代词)+ wasn’t / weren’t. e.g. —Was Joe reading at the time of the rainstorm —Yes, he was. / No, he wasn’t. I was doing my homework at six yesterday evening. Mike and his brother were playing soccer from three to four yesterday afternoon 3. 时间状语 过去进行时由“was / were +动词-ing”构成，表示在过去某一时刻或某一段时间正在进行的动作。常与过去进行时连用的时间状语有at eight / nine ... (o’clock) yesterday morning, at that time，from eight to ten yesterday morning等。 单选。 --I called you yeaterday evening. But nobody answered. --Oh, sorry. I ____ in the bathroom. A. take a shower B. took a shower C. was taking a shower D. takes a shower C They were writing letters to their friends last night. (没有说明信是否写完，只强调在那个时候正在写。) They wrote letters to their friends last night. ( 说明整个写的过程已完成，表达了他们已写好的意思,) They were writing letters to their friends last night. (没有说明信是否写完，只强调在那个时候正在写。) They wrote letters to their friends last night. ( 说明整个写的过程已完成，表达了他们已写好的意思,) I was reading a book yesterday. (未读完，强调昨天正在读。) I read a book yesterday. ( 已读完，“读”这个动作已经做完了，强调昨天读了这本书) 过去进行时表示在过去的某一时刻或某一时间正在进行的动作；（动作未完成，还在进行中） 一般过去时表示发生了的动作（动作已经完成)。 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 ... ...
