Dưới đây là các câu đã được nối lại thành một câu sử dụng mệnh đề quan hệ:

1. Mary, who lives next door, is my best friend.
2. The man, who owns a dog, is my neighbor.
3. The dress that I bought yesterday is very beautiful.
4. The book, which is about history, is interesting.
5. The teacher, who gives a lot of homework, is strict.