there used to be 一般疑问句是used there to be

题目

there used to be 一般疑问句是used there to be
there used to be 一般疑问句是：
Did there use to be...（对吗）
there used to be 的否定句是：
There didn't use to be...（对吗）

答案

there used to be 一般疑问句是：
Did there use to be
there used to be 的否定句是：
There didn't use to be