он мой брат ему 10 лет а мне 12 лет
He's my brother. He's 10 and I'm 12.
He is my brother, 10 years old, and I am 12
He is my brother. He is 10 years old. And I am 12 years old.
Anna, your third sentence should be part of your second sentence.
Thank you
👍🏼
