Question as an answer.
Hello!
I’m struggling to find any grammar article about that, but haven’t found any yet.
Basically, I think you can reply to somebody’s statement with a question like “Do you?”, “Have they?”, “ Is she?”, but I’m not sure.
For example. - I’m a true professional in that field.
-Are you?
-I was doing in for three hours yesterday.
-Were you?
Does it sound correct?