Question

you have a very good time,did not you ?是什么语法 什么句型？

Answer 1

有两个小错误：
首先，have a good time (玩得挺愉快) 要不就是正在进行中的提问，要不就是已经过去了。
所以，通常只会听到
you are having a good time, aren't you? 或者
you had a good time, didn't you?
前后时态必须一致，以为呼应。

其次，aren't you 或 didn't you 这些后面附加的反诘句，可以有两种形式，
1. didn't you? ( 不可分开为 did not you)
2. did you not?

所以要充分理解其中之巧妙。

希望能对您的学习有一些帮助 . . .

Answer 2

反义疑问句