Betty: Fred, I found out about you and that other girl. How could you do this to me?
Fred: Betty, you've got to believe me! I would never cheat on you Betty!
Betty: I know all about your other lady Fred! Your friend Martin told on you!
1. find out about
查明;弄清状况
He found out about the theft
同义词
Discover
She discovered that the man was a liar
detect 察觉
I detected anger in her voice. 我察觉到她的声音里面有愤怒的情绪
Unearth发现
He unearthed a secret.
Catch on to理解
2. cheat on sb (男女之间)欺骗;出轨
Betray 背叛
betray the secret
泄露消息
your voice betrays your anger 你的声音显出出你很生气。
be unfaithful to 不忠实
3.tell on sb 告发某人
inform on sb告发,检举
sneak 溜;鬼鬼祟祟
Sneak on sb: (儿童向成人)打小报告,告状
Grass on sb(向警方)告密,告发