They are not going to play ball tomorrow.改为一般疑问句怎么改?

问题描述:

They are not going to play ball tomorrow.改为一般疑问句怎么改?
如题.
是不是are they not going to play ball?还是aren't they going to play ball?

Aren't they going to play ball tomorrow? 口语
Are they not going to play ball tomorrow? 在口语有强调的意思,书面语.