1. Whom did you meet yesterday? (Whom dùng để hỏi cho tân ngữ khác với Who dùng cho chủ ngữ)
2. Whose car is it? (Whose: của ai)
3. Who gives you this gift? (Who: ai, dùng cho chủ ngữ).
4. I had (a cup of coffee and a slice of bread) for breakfast.
→ What did you have for breakfast? (What: cái gì)