YOU SAID:

That's not a knife, this is a knife.

INTO JAPANESE

あれはナイフじゃないよ。これがナイフだよ。

BACK INTO ENGLISH

That's not a knife. THIS is a knife.

INTO JAPANESE

あれはナイフじゃないよ。これがナイフだよ。

BACK INTO ENGLISH

That's not a knife. THIS is a knife.