But you drawing the story, are you?

aren't you?

不对，drawing前面少了aren't

不对。
至少在正式的语法上不对。
可改为：
But you aren't drawing the story, are you?
或者：
But you drawing the story, aren't you?

因为不知道句意所以有两种改法：
1 But you're drawing the story,aren't you?

2 But you're not drawing the story,are you?

在表示正在进行时，动词ing前边一定要有谓语动词 还有 反疑疑问句是 前否后肯 或前肯后否，特殊情况除外。