The man didn't hold out a bag.
Did the man hold out a bag?
It wasn't empty.
Was it empty?
Everyone didn't stare at the three people.
Did everyone stare at the three people?
He didn't steal my purse.
Did he steal my purse.
The woman didn't say angrily.
Did the woman say angrily?
方法：
1. 原句带was/were的：
否定句==》将was/were改为wasn't/weren't
疑问句==》将was/were和主语互换位置
2. 原句带动词过去式的：
否定句==》加否定助动词didn't后把原动词过去式改为原形
疑问句==》主语前加Did,原动词过去式改为原形