A man is judged not only by what he says but also by what he does.
not only ...but also 是并列结构，后面连接的并列成分应该一致
not only 后面是宾语从句 “what he says”，所以需要将his deeds改为what he does。
句意：判断一个人不仅要看他说什么，还要看他做什么。
