A. Relative pronouns:( Mệnh đề quan hệ)Subject (Chủ ngữ)Object ( Tân ngữ)Possessive( Sỡ hữu)For persons(Dùng cho người)who /( that)whom /(that)whose For things(Dùng cho vật)which /( that)which /(that)whose /(of which) Ex: - The student who answered the questions was Jonh. - This is the man whom we saw. -The girl whose picture you took is my sister. Ex: -The pencil which is in your pocket belongs to me. -The car which he bought is expensive. -The tree whose branches are dead will be felled tomorrow. * “That” : Bắt buộc phải dùng :”That”: 1. Sau một tiền trí từ hổn hợp :( Chỉ người và vật). Ex : The old man and two dogs that passed my house made much noise. 2. Sau một tính từ cực cấp:(So sánh nhất) Ex : This is the most beautiful dress that I have 3. Sau các từ : all ,every , very ,only ,first , last ,much , one ,little ,some, any,no ,it...