昨天晚上九点钟，你在干什么？ 用英语怎么说

What were you doing at 9 last night?

昨天晚上九点钟，你在干什么？
What were you doing at nine o'clock last night?

Yesterday 21:00 minutes ,What do you doing

What were you doing at 9:00 last night
这是典型的过去进行时。

what were you doing at 9 o'clock yesterday?

what were you doing at 9 o'clock last night?