come forward

英 [kʌm ˈfɔːwəd]

美 [kʌm ˈfɔːrwərd]

自告奋勇; 主动提供（信息）

柯林斯词典

PHRASAL VERB 自告奋勇;主动提供(信息)
If someonecomes forward, they offer to do something or to give some information in response to a request for help.
1. A vital witness came forward to say that she saw Tanner wearing the boots.
  一位非常重要的证人站出来说她看见坦纳穿着那双靴子。

verb

make oneself visible
1. Young people should step to the fore and help their peers
Synonym:come to the forestep forwardstep upstep to the forecome out

Investigations have ground to a standstill because no witnesses have come forward.
调查陷入停滞，因为没有证人站出来。
All patriots belong to one big family, whether they rally to the common cause early or late.; All patriots belong to one big family, whether they come forward early or late.
爱国一家，爱国不分先后。
As I call your name, please come forward and tell us about your Christmas wish.
在我叫道你的名字时，请走到前面来，告诉我们你的圣诞愿望。
Expect the best, and the best will come forward.
期待最好的情况，最好的情况会来临的。
If someone would like to come forward to help with the school trip we should be extremely grateful.
如果有人愿意资助学校的旅行的话，我们将感激不尽。
Faculty and Student Council representatives will come forward to wash each other's feet.
老师和学生会代表将会上前来彼此洗脚。
The police have appealed to anyone with information to come forward and talk to them.
警察呼吁所有知情的人来和他们谈谈。
All these people will come forward if we need them to testify?
如果需要作证的话这些人都会站出来吗？
Grace appeared in the dining-room light but didn't come forward. "The lady go?" she said.
格雷斯在餐厅的光亮里现身但是没往前走。“那位女士走了吗？”她说。
Ben, I want whoever's responsible to come forward.
本，我希望不管是谁的责任，他都能够站出来。