一、构成方法 过去进行时由 was/were 加现在分词构成。http://yingyu.chazidian.com 二、用法说明 ■表示在过去某一时刻或某一阶段正在发生的动作。如: What were you doing this time yesterday? 昨天这个时候你在做什么? During the summer of 1999 she was travelling in Europe. 1999年夏天她在欧洲旅行。 ■表示过去将来,多用于go, come, leave, start, take off等动词。如: He said he was leaving for home in a day or two. 他说他一两天之内就动身回家了。 ■表示过去的经常动作,常与always,forever等连用,略带感****彩。如: She was always thinking of others. 她老是想到别人。(赞扬) She was forever complaining. 她老是抱怨。(厌烦) ■表示某个短暂性动作发生的背景。如果主句谓语和从句谓语都发生在过去,动作时间长的用过去进行时,表达谈话背景;动作时间短的用一般过去时,表达新的信息。如: I was reading the newspaper when the doorbell rang. 我正在看报,突然门铃响了。 Jim burnt his hand when he was cooking the dinner. 吉姆做饭时把手烫了。 I met Diana while I was shopping this morning. 我今早买东西时碰到了戴安娜。 ■表示两个同时持续的动作。如: I was doing my homework while he was listening to music. 我在做作业而他在听音乐。 ■过去进行时可以表示客气的语气。如: I was wondering if you could give me a lift. 不知我可否顺便搭你的车。