YOU SAID:

That boyfriend of yours is good at boats.

INTO JAPANESE

あなたの彼氏はボートが得意です。

BACK INTO ENGLISH

Your boyfriend is good at boating.

INTO JAPANESE

あなたの彼氏はボートが上手ですね。

BACK INTO ENGLISH

Your boyfriend is a good rower.

INTO JAPANESE

あなたの彼氏は漕ぎが上手ですね。

BACK INTO ENGLISH

Your boyfriend is a good rower.