CÁC TRƯỜNG HỢP ĐẶC BIỆT KHÁC

7. Các trường hợp đặc biệt khác: Used to → didn’t Ví dụ: She used to go for a walk, didn’t she? Had better → hadn’t Ví dụ: I had better do my exercise, hadn’t I? Would rather → wouldn’t Ví dụ: They would rather go out than stay at home, wouldn’t they? EXERCISE I