告诉你一个秘密

tell you a secret

→ 告诉
phrase Rare #25,221
tell you a secret Used to introduce something confidential or surprising that the speaker is about to share. 告诉你 can also be understood as “let me tell you.”
CH: 我有件事想告诉你一个秘密。
EN: I want to tell you a secret.

不过我想告诉你一个秘密

But I want to tell you a secret.

— 看不见的客人 (2017)

告诉你一个秘密

Let me tell you a secret.

— 机械师 (2004)

我要告诉你一个秘密

I have a secret to tell you.

— 时空恋旅人 (2013)

过来我要告诉你一个秘密

Come here, I want to tell you a secret.

— 睁开你的双眼 (1997)

告诉你一个秘密但你别说出去其实我是警察

Let me tell you a secret, but don’t tell anyone: I’m actually a police officer.

— 无间道 (2002)