Unit4知识点讲解1. see the doctor看医生，看病2. toothache牙疼；headache头疼；fever发烧；cold感冒3. have a toothache牙痛；have a fever发烧；have a cold感冒 feel hot；feel cold；feel tired4. -Whats wrong with you?=Whats the matter with you?你怎么了？ -I have a . I feel/I cant.（with是介词，后面人称代词要用宾格）5. Let me check.让我检查一下。6. Let+宾格+动词原形7. -What should I do?我应该怎么办？ -You should. You shouldnt. should译为“应该”，是情态动词，后面接动词原形。 should的否定形式shouldnt8. have a rest休息一下；at home在家9. take some medici
