the present continuous tense

It's used to take about something happens in the time of speak. Form  : I (am)+verb+ing             He,she, it (is)+verb+ing             We, you, they (are) +verb+ing Negative  :I (am not) +v+ing                   He, she, it (isn't) +v+ing                   We, you, they (aren't) +v+ing Question  : am + I +v + ing....?                    Is + he, she, it +v +ing...?                   Are + we, you, they +v +ing..? Examples : *I am playing tennis.                    *She isn't reading now.                      *Are you smoking? Key words : now, this morning.