题目内容：

mary loves to sing songs 对 to sing songs 提问

优质解答

问：What does mary love to do?
答：Mary loves to sing songs.

追问：

这个句子做否定句疑问句和肯定回答

追答：

问：Doesn't Mary love to sing songs? 答：Yes，she loves to sing songs.

追问：

这个句子否定句

追答：

Mary doesn't love to sing songs.