Атив в пассив 1) i did this work yesterday 2) i was writing letters at 5 p. m. yesterday 3) nobody has visited the exhibition yet 4) i have already sent for the doctor 5) i will have finished the transaction of this article tomorrow by 2 o'clock

1. this work was done by me yesterday.
2. letters were being written by me at 5 p.m.
3. this exhibition has not been visited yet.
4. the doctor has been already sent by me.
5. the transaction of this article will have been finished by me by 2 o'clock.