疑问词 + 一般疑问句。
1、疑问词在句中不充当主语或者不修饰主语时,一般过去时的特殊疑问句结构为：疑问词 + 一般疑问句。
例如：
What did you do yesterday? 昨天你做什么了？
When were you born? 你是什么时候出生的？
Why didn’t you come here? 你们为什么没到这儿来？
2、疑问词在句中充当主语或修饰主语时,一般过去时的特殊疑问句结构为:疑问词 + 行为动词的过去式(或 was/were + 表语) + 其它成分。
例如:
Who cleaned our classroom yesterday? 昨天谁打扫我们的教室了？
Who was on duty the day before yesterday? 前天谁值日？
Whose father came to see our teacher just now? 刚才谁的父亲来看我们老师了？
练一练：用括号中所给动词的适当形式填空。
He _____ (not bring) us books yesterday.
Yesterday Mike and I_____(go) to the farm. We_____(carry) some water for the old man. We_____(have) a good time there.
Some foreign friends_____(visit) your school three days ago._____ they_____(ask) you any questions about your study?
The old man_____(stay) in Shanghai in 2000.
—When_____ your sister_____(do) her homework?
—She_____(do) it an hour ago.
When we_____(be) on holiday in Zunyi last summer, we_____(enjoy) ourselves there.