YOU SAID:

the dog runs faster then the little boy

INTO JAPANESE

犬は速く走って、小さな男の子

BACK INTO ENGLISH

A dog ran fast and a little boy

INTO JAPANESE

犬は速く走って、少年は走った

BACK INTO ENGLISH

The dog ran fast and the boy ran

INTO JAPANESE

犬は速く走り、少年は走った

BACK INTO ENGLISH

The dog ran fast and the boy ran