YOU SAID:
My university is afire.
INTO JAPANESE
私の大学は燃えです。
BACK INTO ENGLISH
My University is burning.
INTO JAPANESE
私の大学は燃えています。
BACK INTO ENGLISH
My University is on fire.
INTO JAPANESE
私の大学が燃えています。
BACK INTO ENGLISH
My University is on fire.
That didn't even make that much sense in English.