YOU SAID:
If you have never seen the great death, do so
INTO JAPANESE
あなたが大死を見たことがないなら、そうしてください
BACK INTO ENGLISH
If you have never seen a mortal death, do so
INTO JAPANESE
致命的な死を見たことがない場合は、そうしてください
BACK INTO ENGLISH
If you haven't seen a fatal death, do so
INTO JAPANESE
致命的な死を見たことがない場合は、そうしてください
BACK INTO ENGLISH
If you haven't seen a fatal death, do so
That didn't even make that much sense in English.