YOU SAID:

i eat rocks for dinner

INTO JAPANESE

私は夕食に岩を食べる

BACK INTO ENGLISH

I eat rocks for dinner

INTO JAPANESE

私は夕食に岩を食べます

BACK INTO ENGLISH

I eat rocks for supper

INTO JAPANESE

私は夕食のために岩を食べます

BACK INTO ENGLISH

I eat rocks for supper