come of sth
= come from sth. come of sth/doing sth (also come from doing sth) be the result of sth 是某事物的结果
He promised to help, but I don´t think anything will come of it. 他答应帮忙, 但我想不会有任何结果.
This is what comes of being over-confident. 这就是过於自信的结果.
No harm can come of trying. 不妨试一试.