Grammar

Present Simple:

I smoke                             he smokes

I don't smoke                    he doesn't

Do you smoke?                 Does he smoke

Time expresions:

Every day.  Always, often, smetimes, usually, rarely,never

Present continous:

I am smoking                                  He is smoking

I am not smoking                            he isn't

Are you smoking?                           is he smoking

Time expressions:

Now, Right now, at the moment, at present