YOU SAID:

I saw a fly and heard a horse walk down the street

INTO JAPANESE

私はハエを見て、馬が通りを歩いているのを聞いた

BACK INTO ENGLISH

I saw a fly and heard a horse walking down the street

INTO JAPANESE

私はハエを見て、馬が通りを歩いているのを聞いた

BACK INTO ENGLISH

I saw a fly and heard a horse walking down the street