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

If he's willing to come forward on our behalf, we're sure to succeed.
他要肯出头，咱们这件事准能成功。
They have come forward with an offer of help.
他们主动表示要提供帮助。
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。
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？
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。
Nobody has yet come forward with any information relating to the girl's death.
还没有人出来提供关于这女孩之死的任何消息。
He crooked his finger: 'Come forward,' he said.
他勾勾手指说：“过来。”
No witnesses have come forward.
没有目击证人站出来。
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。
Police said that several people had come forward with information about the attack.
警察说已经有好几个人提供了关于这次袭击的信息。