Tom does his homewark at home(否定句/一般疑问句）

否定句:Tom doesn't his homewark at home.
一般疑问句:Does Tom do his homewark at home?
划线部分提问:What does Tom do at home.

What Tom does at home?
He does his homework.

Tom doesn't do his homework at home.
Does Tom do his homework at home?
What does Tom do at home?

否定句:Tom doesn't do his homework at home.

一般疑问句:Does Tom do his homework at home?

是强调句！ does表示强调是一般现在时！