What's wrong with you , young man ?   Doctor , I have a bad cough and a headache .   Do you have a fever ?   I don't know , but I feel terrible .   Let me examine you . Don't worry . It's nothing serious .   Do you think I should lie in bed ?   Yes , stay in bed and drink a lot of water . Your fever will be gone in a day or two .   OK . Do you think I can play football tomorrow ?   Of course not . You need a good rest . 