No young man starting life could have better capital than plenty of friends. They will strengthen his credit, support him in every great effort, and make him what, unaided, he could never be. 请问这里的unaided可以改成unaidedly吗？ 形容词也可以单独用作插入语吗？我在手机的有道词典上查没有找到unaidedly这个词，如果有副词形式的话可否填副词作插入语呢？ 请问老师们平时词典用的都是什么呢？