彼は前置詞の勉強に専念した。の英語

He concentrated on his study of prepositions.

He devoted himself to the study of English literature.

He devoted himself to the study of literature.

He devoted himself single‐mindedly [solely, wholeheartedly] to the study of English literature.

He is absorbed in the study of linguistics.

He applied himself to the study of Spanish.

He applied himself to his study, without thought for his normal life.

He devoted himself to the study of demonology.

He soaked himself in literature.

He dedicated himself to the study of bacteria.

He applied himself to this scientific study.

He devoted himself to the study of chemistry.

He lost himself in his studies.

He devoted himself to the study of medicine.

He put on airs with his learning.

He is absorbed in the study of Latin.

He applied himself to his study.

He left the chemistry class early.

I found him at his books.

He is absorbed in the study of the Fuzzy Theory.

While abroad, he made a specialty of English.

He was devoted to medical science.

He turned from Shakespeare to the study of Hardy.

He's engaged in language studies.

He studied like one possessed.

He devoted his life to the study of science.

He devoted his life to his study.

He has risen by dint of perseverance―（他動詞構文にすれば）―Simple perseverance has raised him in the world.

He began to study in earnest.

He was very enthusiastic about his studies.