Question

used to 的一般疑问句是如何构成的？还有否定句呢

Answer 1

1. used to的一般疑问句有两种构成方法：
1）将used提前至句首，结构为：Used + 主语 + to do sth...?
2）将did提前至句首，结构为：Did + 主语 + use to do sth...?

2. 同样，其否定句也有两种构成方式：
1）直接在used后面加上not，也可一起缩写成usedn't.
结构为：主语 + used not to do sth... 或 主语 + usedn't to do sth...
2）借助于助动词didn't，其结构为：
主语 + didn't use to do sth....

3. 如：
1）Used he to get up early?
= Did he use to get up early?
2) He used not to get up early.
= He usedn't to get up early.
= He didn't use to get up early.