please help to correct my grammar or put in better words/phrases
How old were you when you started smoking?
Why did you start smoking?
If you know that smoking is bad for your health, why do you still continue?
Do you plan on quitting?
What do your family or friends think about you smoking?
Where is your favourite place for smoking?
How much do you smoke per day?
When do you usually smoke?
Have you ever tried quitting?
Are you afraid of influencing the young to smoke?