YOU SAID:

school just blew up and left a massive mark on the ground

INTO JAPANESE

学校が爆発したばかりで、地面に大きな跡を残した

BACK INTO ENGLISH

The school just blew up, leaving a big mark on the ground.

INTO JAPANESE

学校は爆破されたばかりで、地面に大きな跡が残っていた。

BACK INTO ENGLISH

The school had just been blown up, leaving a big mark on the ground.

INTO JAPANESE

学校は爆破されたばかりで、地面に大きな跡が残っていた。

BACK INTO ENGLISH

The school had just been blown up, leaving a big mark on the ground.