YOU SAID:
I am a big boy Young man
INTO JAPANESE
私は大きな男の子です若い男
BACK INTO ENGLISH
I am a big boy young man
INTO JAPANESE
私は大きな男の子の若い男です
BACK INTO ENGLISH
I am a young man with a big boy
INTO JAPANESE
私は大きな男の子を持つ若い男です
BACK INTO ENGLISH
I am a young man with a big boy
That didn't even make that much sense in English.