how do you say this sentence in English correctly?
I want to know what is correct? I studied for being an English or I studied to be an English teacher? I ask this because I don't know what is the difference? I hope your answers.

Question

Answer

generally, I think they are the same. 
in some special situation, the first sentence can have a little distinctive feeling from the other.
I studied for being an English teacher ( but I haven't got the object. or I have lots of objects, and to be an english teacher was one of them)
I studied to be an English teacher ( and I've been an english teacher. (achieved my goals)

Answer

I studied to be an English teacher.

You can study for an exam or test but not a profession :)