was were doing 是表示过去将来时吗

题目

was were doing 是表示过去将来时吗

答案

1.概念：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 s+was/were+doing When he knocked a...