Выражение длительного действия, начавшегося в определенный момент в прошлом и продолжающегося в настоящее время
Active: to have been +V-ing, I have been visiting
Passive: используются формы Perfect
Ann is moving to New Jersy at the beginning of December. She is going to work in factory. On Christmas she will be at Jack's party.
2.What museums have you visited already?
3.Whom you talk to yesterday?
4.What instrument can Jim play?
5.How often she eats sweets?
Buying
to buy
to lock
locking
to say
buying
to visit
visiting
to meet
waiting
To be да , это - is и are , а have , только если Perfect Continius