My brother often plays football after school.
一般疑问句Does your brother often play football after school?
肯定回答Yes,he does.
否定回答No,he doesn't.
(后面的不太确定)
Amy sometimes doesn't go home on foot.
一般疑问句 Doesn't Amy sometimes go home on foot?
肯定回答 Yes,she does.
否定回答 No,she doesn't