Jack Merson IS a head physician of a hospital.
He IS always busy.
Yesterday he WAS on a business trip.
Tomorrow he WILL BE on the meeting in the surgical department.
Last week he WAS in the therapeutical department.
Next week he WILL BE in the traumatological department.
At the moment he IS discussing the problems on the meeting with population.
In two hours he IS going in his car to another building of the hospital where ill children ARE.
Patients ARE very glad to see him in their wards.