YOU SAID:

I must find my little brother who is a sick little boy.

INTO JAPANESE

私は病気の男の子である私の弟を見つけなければなりません。

BACK INTO ENGLISH

I have to find my brother who is a sick boy.

INTO JAPANESE

私は病気の男の子である私の兄弟を見つけなければなりません。

BACK INTO ENGLISH

I have to find my brother who is a sick boy.