Question

we have school uniforms(变成一般疑问句并做否定回答)

Answer 1

have “有，拥有”，其疑问和否定形式有两种，
Do you have school uniforms?
No, we don't have.
Have you school uniforms?
No, we haven't.
再如：
Do you have a brother? No, I don"t have a brother.
Have you a brother? No, I haven"t a brother.

Answer 2

Do you have to wear uniforms at school? 或者说: Do we have to wear uniforms at school? 一般大家都通用的：Do you have to wear uniforms

Answer 3

Do you have school uniforms? No. we don't.

Answer 4

Do you have school uniforms?
No, we don't have.