Hi, I saw a question tag using "did he not?" in my grammar book, but I've never seen this structure before. Soon after that, I also thought of a similar structure:
I'm late, am I not?
While I know the above example is correct, I'm not sure if other question tags and questions could use this kind of structure as well. So I've made several sentences. Could you please see if the following sentences are acceptable? Thank you!
He used to smoke, did he not? (=didn't he?) (This one is what I saw in my grammar book)
He broke the window, did he not? (=didn't he?)
I can go, can I not? (=can't I?)
Your mother is a teacher, is she not? (=isn't she?)
All we want is peace, is it not? (=isn't it?)
Is it not almost 2 o'clock? (=Isn't it...)
Why did you not come to lunch with us? (=Why didn't you...)
Are you not having a good time? (=Aren't you...)
Did you see that girl in red dress? Is she not Mary? (=Isn't she...)