Bonjour Quelqu’un pourrait m’aider pour l’exercice trois

1. How long have you been suffering from headaches?
2. I've been having bad headaches since last December
3. Also, I have been coughing a lot recently
4. Do you smoke? How many cigarettes do you smoke a day?
5. I smoke too much. I have been smoking since my 13th birthday
6. But I have decided to stop.