What’s the difference between "lúc" and "khi"?

✅ Explanation:

"Lúc" and "khi" both mean "when", but they are used slightly differently depending on the sentence structure.

• "Khi" is more general and formal, often used with complete actions or clauses.

• "Lúc" usually refers to a specific moment in time, and often followed by a noun or phrase.
  

• 📘 Example Sentences:

• Khi tôi đến, cô ấy đang nấu ăn.
  (When I arrived, she was cooking.)

• Lúc đó, tôi đang học bài.
  (At that time, I was studying.)
  
  

📊 Comparison:

Khi: when, more formal or general, a full clause

Lúc: when / at the moment, more specific, a time or short phrase

⚠️ Notes and Tips:

• In many cases, you can use both lúc and khi, but khi is safer in writing, while lúc is more conversational.

• Try to notice how native speakers use them in daily conversations.

📝 Tip: If you’re talking about a specific time (like "at that moment"), use "lúc". If it’s more about an action or event, go with "khi".