将下列每个英语句子改成一般疑问句加回答,和否定句.

1：Mary works in the park 。
Does Mary work in the park?
Yes, she does。
No。 Mary doesn't work in the park。
2:Students go to school 。
Do students go to schoo?
Yes, they do。
No。 Students don't go to school。
3。He sings well 。
Does he sing well?
Yes, he does。
No。 He doesn't sing well。
再问： 如果修改后，会更好。不过你是第一个回答的
再答： You are welcome。