YOU SAID:
My pajama pants caught fire.
INTO JAPANESE
私のパジャマのズボンが燃えた。
BACK INTO ENGLISH
My pajamas pants burned.
INTO JAPANESE
私のパジャマズボンは燃えました。
BACK INTO ENGLISH
My pajamas trousers were on fire.
INTO JAPANESE
私のパジャマズボンは燃えていました。
BACK INTO ENGLISH
My pajamas trousers were on fire.
That's deep, man.