hadbeing是什么时态

had doing是过去进行时，表示过去某时正在进行的状态或动作。

例句

We were having supper when the phone rang. 我们正在吃晚饭时，电话响了

过去进行时结构

1. 过去进行时由“主语+was/were + doing”构成.

eg We were having supper when the phone rang. 我们正在吃晚饭时电话响了。

2. 过去进行时的否定式由“主语+was/were not +doing”构成.

eg This time yesterday Jack was not watching TV. He was repairing his bike. 昨天这个时候，杰克不是在看电视，而是在修理自行车。

3. 过去进行时的疑问式由“was/were +主语+doing”组成.

eg Were you playing basketball at four yesterday afternoon? 昨天下午四点你们在打篮球吗？