A) The postbox was emptied yesterday.
The postbox is emptied every day.
The postbox will be emptied tomorrow
b) The stamps are postmarked at the post office.
The stampswe're postmarked at the post office yesterday.
The stamps will be postmarked at the post office tomorrow.
c) The letters are sorted into the different countries.
The letters were sorted into the different countries yesterday.
The letters will be sorted into the different countries tomorrow.
d) The movie is loaded into the train.
The movie was loaded into the train yesterday.
The movie will be loaded into the train tomorrow.
e) The bags are taken to the post office.
The bags were taken to the post off yesterday.
The bags will be taken to the post office tomorrow.