1. have a stomachache

2. have the flu

3. have a sore throat

4. have a fever

5. have a backache

6. have a cough

7. have a toothache

8. have a headache

9. to be sick

10. to be ill

11. take a sick

12. catch a sick

13. contract an illness

14. I have a bad cold

15. I need to see a doctor at once

16. I have a headache and a bad cough

17. I feel dizzy

这些短语可以帮助你描述生病的各种症状和情况。希望这些信息对你有所帮助!如果有更多具体需求或想要了解更多细节，请告诉我。