1. What was the name of the girl who phoned you last night?
→ “Who” làm chủ ngữ của động từ “phoned”.

2. What was the name of the girl whom you phoned last night?
→ “Whom” là tân ngữ của động từ “phoned”. (Trong văn nói có thể dùng “who”).

3. The bed on which I slept was too soft.
→ Cụm “sleep on the bed” → phải dùng giới từ “on”.

4. I didn’t get the job for which I applied.
→ “Apply for a job” → dùng “for”.

5. The man to whom she is married has been married twice before.
→ “Be married to someone” → dùng “to”.

6. The party to which we went wasn’t very enjoyable.
→ “Go to a party” → dùng “to”.

7. Who was that girl with whom you were yesterday?
→ “Be with someone” → dùng “with”.

8. The flight on which we wanted to travel was fully booked.
→ “Travel on a flight” → dùng “on”.

9. I enjoy my job because I like the people with whom I work.
→ “Work with someone” → dùng “with”.

10. I wasn’t interested in the things about which they were talking.
→ “Talk about something” → dùng “about”.