我悄悄告诉你一个秘密。

Wǒ qiāoqiāo gàosu nǐ yí gè mìmì.

I'll quietly tell you a secret.

他对你悄悄地说了些什么？

Tā duì nǐ qiāoqiāo de shuō le xiē shénme?

What did he whisper to you?

他悄悄地走进了教室。

Tā qiāoqiāo de zǒu jìnle jiàoshì.

He quietly entered the classroom.