英語を教えることが彼の専門的職業です。の英語

Teaching English is his profession.

He is qualified as an English teacher.

He is qualified as an English teacher.

They teach English to foreign students at a vocational college in Tokyo.

They teach English to foreign students at vocational colleges in Tokyo.

He is at present engaged in teaching English.

He has found work as a teacher of English―secured a position as teacher of English.

History is not his major subject.

My job is teaching English.

Poetry is not in his line.

it was his area of specialization

Mathematics is his strongest subject.

Mathematics is his best subject.

He's practiced in teaching English.

He is an average English teacher―an ordinary English teacher.

He has been engaged in teaching English for years.

He is looking out for a position as teacher of English.

There are few men competent for teaching English.

his specialization is gastroenterology

He is taking private lessons in English from an Englishman.

He wants a position as teacher of English.

He is a competent teacher of English―competent to teach English.

He is above the generality of English teachers―above the common run of English teachers.

communications is his major field of study

He is a former English teacher.

He is looking out for―on the lookout for―a position as teacher of English.

In addition to teaching English, he is engaged in literary work.

I wish to recommend him as teacher of English.

He is a teacher of English.

He is an English teacher.