YOU SAID:

the cat is blue and very heavy, it likes to straddle up and down the sidewalk

INTO JAPANESE

猫は青くて重い、歩道を上下にまたぐのが好き

BACK INTO ENGLISH

Cats are blue and heavy and like to cross the sidewalk up and down

INTO JAPANESE

猫は青くて重く、歩道を上下に渡るのが好きです

BACK INTO ENGLISH

Cats are blue and heavy and like to cross the sidewalk up and down