come forward

present oneself 站出来; 自告奋勇; 挺身而出: come forward with help, information, money 自告奋勇提供帮助、 信息、 金钱 * Police have asked witnesses of the accident to come forward. 警方要求事故的目击者挺身而出予以协助.

come alive, come along, come apart, come around, come around (to sth), come at, come at sb, come away (from sth), come back, come before, come before sb/sth, come between, come between sb and sb, come by, come by sth, come down, come down on, come down to, come for, come forth, come from..., come home, come in, come in for, come into, come into acceptance, come into being, come into contact with, come into effect, come into force, come into one's own, come into operation, come into power, come into sth, come into use, come of, come of sth, come off, come on, come on the scene,