6、过去进行时
1.定义:表示过去某段时间或某一时刻正在发生或进行的行为或动作。
2.时间状语:at this time yesterday, at that time 或以 when 引导的谓语动词是一般过去时的时间状语等。
3.基本结构: 主语+was / were+doing+其它
4.否定形式:主语+was/were+not+doing+其它
5.一般疑问句:把 was 或 were 放于句首。(第一个字母大写)
eg:
①At that time she was working in a company. 那段时间她在一家公司工作。
②When he came in, I was reading a newspaper. 他进去时,我正在读报纸。