Many times?
I teach. I am a teacher. Those are things I have heard many times.
Of the ones you propose, only "I am in teaching" could work -- the others are impossible.
I am in teaching.
I am on teaching.
I am at teaching. Which one is correct?
The first and second I have heard many times.
Thank You.
Many times?
I teach. I am a teacher. Those are things I have heard many times.
Of the ones you propose, only "I am in teaching" could work -- the others are impossible.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
I am in teaching.
This means that my job has to do with teaching. Although it would more natural to say "I'm in education".
Similarly: I am in real estate (I work with real estate); I am in retail (my job is in the retail field)
The other two -- I am on teaching and I am at teaching -- don't mean anything on their own and are incorrect.
You can say "I am good at teaching" but not "I am at teaching".
I can't think of any way to use on here.