YOU SAID:

We wrote to your brother three times a week last year.

INTO JAPANESE

私たちは昨年、週に3回、あなたの兄弟に書きました。

BACK INTO ENGLISH

We wrote to your brothers three times a week last year.

INTO JAPANESE

私たちは昨年、週に3回、あなたの兄弟たちに書きました。

BACK INTO ENGLISH

We wrote to your brothers three times a week last year.