1.否定句：He usedn't / didn't use to go to school late .
Lucy usedn't / didn't use to go to bed late.
We usedn't / didn't use to have long hair .
2.一般疑问句及回答：Did he use to go to school late?Yes,he did.No,he didn't.
/ Used he to go to school late?Yes,he used.No,he usedn't.
Did Lucy use to go to bed late?Yes,she did.No,she didn't
/ .Used Lucy to go to bed late?Yes,she used.No,she usedn't.
Did you use to have long hair Yes,we did.No,we didn't.
/ Used you to have long hair Yes,we used.No,we usedn't.
3.反义疑问句：He usedn't / didn't use to go to school late ,used/did he?
Lucy usedn't / didn't use to go to bed late,used/did she?
We usedn't / didn't use to have long hair ,used/did we?
或者：He used to go to school late ,usedn't / didn't he?
Lucy used to go to bed late,usedn't / didn't she?.
We used to have long hair ,usedn't / didn't we?