YOU SAID:

He's been dead for a while tho so he can't be that strong

INTO JAPANESE

彼は死んでからしばらく経っているので、それほど強くはありません

BACK INTO ENGLISH

He's been dead for a while so he's not that strong

INTO JAPANESE

死んでからしばらく経っているのでそこまで強くない

BACK INTO ENGLISH

It's been a while since he died, so he's not that strong.

INTO JAPANESE

死んでから時間が経っているので、それほど強くはありません。

BACK INTO ENGLISH

It's been a while since he died, so he's not that strong.