YOU SAID:
I love cats when they run
INTO JAPANESE
私は猫が走るときが大好きです
BACK INTO ENGLISH
I love when cats run.
INTO JAPANESE
猫が走るのが大好きです。
BACK INTO ENGLISH
Cats love to run.
INTO JAPANESE
猫は走るのが大好きです。
BACK INTO ENGLISH
Cats love to run.
You've done this before, haven't you.