不是高手，试解一下。
EnLearner
2011-10-19 19:12:36
( reads)
He used to be a sailor.
这句子的否定式是：
He didn't use to be a sailor
Or
He used not to be a sailor.
个人认为反意疑问句应是：
He used to be a sailor, didn't he?
Or
He used to be a sailor, usedn't he?
beautifulwind
2011-10-19 23:06:33谢谢愚教授！你的答案正好和补课中的例子吻合。