didn't的原形是什么？

Question

如题所述

Answer 1

s+used to+动词原形
He used to be a teacher ,but now he is a writer .

S+didn,t+use to+动词原形
He didn't use to play basketball.

Did+s+use to+动词
Did he use to play basketball ?

用特殊疑问句+一般疑问句＝特殊疑问句
Where did he use to live ?

Answer 2

s+used to+动词原形
He used to be a teacher ,but now he is a writer .
S+didn,t+use to+动词原形
He didn't use to play basketball.
Did+s+use to+动词
Did he use to play basketball ?
用特殊疑问句+一般疑问句＝特殊疑问句
Where did he use to live ?
0

Answer 3

s+used to+动词原形
He used to be a teacher ,but now he is a writer .
S+didn,t+use to+动词原形
He didn't use to play basketball.
Did+s+use to+动词
Did he use to play basketball ?
用特殊疑问句+一般疑问句＝特殊疑问句
Where did he use to live ?

Answer 4

其原形是don't，而非do。
直接理解的话，就是一个表示肯定，一个表示否定，两个是截然不同的，也就自然而然不能将他们等同起来，要保留否定的色彩。
究原因是：don't是donot的缩写，也叫“缩略式”。有没有注意到do的后面跟了not，那么它也就不等同于do这个词。didn't是didnot的“缩略式”，其中did可以退成原形do，组一组就成了don't，故didn't的原形是don't。