Sử dụng đại từ quan hệ để kết hợp 2 câu thành 1 và đặt đại từ quan hệ vào trong ngoặc đơn nếu chúng có thể lược bỏ. Ví dụ: The woman is my dear aunt. My father is talking to the woman. --> The woman (who) my father is talking to is my dear aunt. Hoặc: The woman (that) my father is talking to is my dear aunt. Trong câu có mệnh đề quan hệ hạn định này who/that đóng vai trò làm tân ngữ nên có thể bỏ đi được (nên ta để trong dấu ngoặc đơn). 1)Robert Pattinson is a British actor. He plays Edward Cullen in the Twilight saga. 2)A doctor is a person. A doctor examines patients and gives medical prescriptions. 3)I was given a cat. It was very lovely. 4)Mrs. Cuc is the teacher. She took me to hospital when I fainted at school. 5)Harry Potter book series were written by J.K. Rowling. I enjoyed them a lot. 6)I bought some guavas at the supermarket yesterday. The guavas are tasty. 7)My sister is six years older than me. My sister is also an English teacher. 8)