be in on

• vt. 参加(参与；知道)

be in on的用法和样例：

例句

1. I was in on what you were doing at that time.
   我已知道你那时所干的事。
2. Mike is a nosey chap, he always wants to be in on everything.
   麦克是一个爱管闲事的家伙，他老是想知道每一件事情。
3. I'd like to be in on the scheme.
   我很想参与这项计画。