What do they do last night为啥do不用过去式

问题描述:

What do they do last night为啥do不用过去式

应为:What did they do last night?他们昨晚干什么了? (last night昨晚,过去时间一定要用过去式。)
或What do they do?他们是干什么的?

肯定要用过去时,What did they do last night?

What did they do last night 该用did

用DID答案错了吧