had过去完成时 had been过去完成时被动语态 was一般过去时第一,三人称
过去进行时:
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。
基本结构:was/were+doing
否定形式:was/were+not+doing.
一般疑问句:把was或were放于句首。
 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. 他进来时,我正在读报纸。
过去完成时:
以过去某个时间为标准,在此以前发生的动作或行为,或在过去某动作之前完成的行为,即“过去的过去”。
基本结构:had+done.
否定形式:had+not+done.
一般疑问句:had提到句首。
 eg:
①We had hoped that you would come, but you didn't. 那时我们希望你能来,但是你没有来。
②I had hardly opened the door when he hit me. 我刚打开门,他就打了我。