YOU SAID:

There once was a shiboy who liked their grandma

INTO JAPANESE

昔、おばあちゃんが好きなシボイがいた

BACK INTO ENGLISH

There used to be a shiboy that grandma liked

INTO JAPANESE

昔おばあちゃんが好きだったシボイがいた

BACK INTO ENGLISH

There used to be Shiboy, who used to like grandma

INTO JAPANESE

昔はおばあちゃんが好きだったシボイがいた

BACK INTO ENGLISH

There used to be Shiboy, who used to like grandma