YOU SAID:

there would've been nothing left to do for someone less astute

INTO JAPANESE

それほど賢くない誰かのために何もすることが残っていなかっただろう

BACK INTO ENGLISH

There would have been nothing left to do for someone who wasn't that smart

INTO JAPANESE

それほど賢くない人には何もすることができなかったでしょう

BACK INTO ENGLISH

I wouldn't have been able to do anything for someone who wasn't that smart

INTO JAPANESE

そんなに賢くない人には何もできなかっただろう

BACK INTO ENGLISH

A person who wasn't that smart couldn't do anything

INTO JAPANESE

それほど賢くない人は何もできませんでした

BACK INTO ENGLISH

Someone who wasn't that smart couldn't do anything

INTO JAPANESE

それほど賢くない人は何もできませんでした

BACK INTO ENGLISH

Someone who wasn't that smart couldn't do anything