YOU SAID:

He is on fire i dont know

INTO JAPANESE

彼が燃えている私は知らない

BACK INTO ENGLISH

He was on fire and I do not know

INTO JAPANESE

彼は火にあり、私はわからない

BACK INTO ENGLISH

He is on fire, I'm not sure

INTO JAPANESE

彼は火で、確信はありません。

BACK INTO ENGLISH

He is a fire, not sure.

INTO JAPANESE

彼は、火災を確認です。

BACK INTO ENGLISH

He is the sure fire.

INTO JAPANESE

必ず火です。

BACK INTO ENGLISH

Sure there is fire.

INTO JAPANESE

確かに火があります。

BACK INTO ENGLISH

Certainly there's fire.

INTO JAPANESE

確かに火があります。

BACK INTO ENGLISH

Certainly there's fire.