YOU SAID:

i have a younger brother and he is seven

INTO JAPANESE

私には弟がいて、彼は７歳です

BACK INTO ENGLISH

I have a brother. He's seven.

INTO JAPANESE

私には兄弟がいる。彼は７歳だ

BACK INTO ENGLISH

I have a brother. He's seven years old.

INTO JAPANESE

私には兄弟がいる。彼は７歳だ。

BACK INTO ENGLISH

I have a brother. He is seven years old.

INTO JAPANESE

私には兄弟がいる。彼は７歳だ。

BACK INTO ENGLISH

I have a brother. He is seven years old.