He stay in a factory 一般疑问句 和we stay in a factory 和 They buy a book和they are student

问题描述:

He stay in a factory 一般疑问句 和we stay in a factory 和 They buy a book和they are student
还有They went home yesterday

首先,应该是He stays in a factory.
Does he stay in a factory?
Do we stay in a factory?
Do they buy a book?
Are they student?
Did he go home yesterday?