used to do改为否定句Jack used to live in a small village with his grandpa.改为否定句印象里不是应该在used和to之间加not吗?为什么答案是didn't use to

问题描述:

used to do改为否定句
Jack used to live in a small village with his grandpa.改为否定句
印象里不是应该在used和to之间加not吗?
为什么答案是didn't use to

一个是过去常常 一个是习惯于 不一样的

两种都可以

used to do 有两种否定形式
1.usedn't to do (used not to do)
2.didn't use to do
疑问也是两种
Used……?
Did……?
所以都可以,不过didn't use to 更加常见

这里是不定式,not use to do
情态动词才是在后面加not的,如can not