在英语中，说悄悄话通常是指以低声、私密的方式与他人交流，以便不被其他人听到。这种行为在各种情境下都可能发生，比如在图书馆、会议室或者在需要保持安静的公共场合。以下是一些表达悄悄话的英语短语和情境用法：

1. **Whispering** - 这是最直接的表达方式，即低声说话。

- "I whispered to her so that no one else could hear what I was saying."

- "He whispered the secret into my ear."

2. **Speaking softly** - 这个短语强调的是说话的声音要小，但不一定像耳语那样几乎无声。

- "She spoke softly to avoid disturbing the baby."

- "We were speaking softly so as not to wake up the neighbors."

3. **Murmuring** - 这个词通常用来形容连续的、低声的说话。

- "They were murmuring to each other during the movie."

- "The crowd murmured their approval."

4. **Leaving a message in a low voice** - 当你想要给别人留言，但又不想让周围的人听到时，可以用这个表达。

- "I left a message for him in a low voice, so the others wouldn't know what it was about."

- "She whispered her reply into the phone, leaving a message for her friend."

5. **Confiding in someone** - 这个短语用于描述信任某人并私下分享秘密或私人信息。

- "I confided in my best friend about my plans."

- "He confided in his mentor, speaking in a hushed tone."

6. **Sharing a secret** - 当你与他人分享一个秘密时，通常会用低声说话。

- "She shared a secret with me, and I could see her eyes widen as she whispered it."

- "We shared a secret, speaking in hushed voices so that nobody else would find out."

7. **Talking behind someone's back** - 虽然这个短语通常带有负面含义，但有时也可以描述在某人背后小声说话。

- "They were talking behind her back, whispering about her recent promotion."

- "I heard them whispering behind my back, and I knew they were discussing something important."

使用这些表达方式时，要注意语境和语气，确保你的悄悄话是恰当和礼貌的。同时，也要注意不要在需要保持安静的环境中制造不必要的噪音。