Question

This my brother Tom / How old you?I 8 yeaars old

Answer 1

This is my brother Tom
how old are you?
I'm 8 years old

Answer 2

It seems like there may be some confusion in your question. If you are asking "How old is my brother Tom?" the correct response would be "Your brother Tom is 8 years old." If you are asking "How old are you?" the correct response would be "I am 8 years old." Can you please clarify your question so I can provide a more accurate response?