1. Letters are sent every day/every week. (Письма посылают ежедневно/каждую неделю.)
The letters are being sent now. (Письма посылают сейчас.)
2. The letters were sent yesterday. (Письма послали вчера.)
The letters have been sent today. (Письма послали/отправили сегодня.)
The letters had been sent before you came. (Письма послали/отправили до того, как вы пришли.)
3. The letters were being sent when I came. (Письма посылали, когда я пришел.)
The letters were being sent this time yesterday. (Письма посылали вчера в это время.)
4. The letters will be sent tomorrow. (Письма будут посланы завтра.)
5. The letters will have been sent before you come. (Письма будут посланы до того, как вы придёте.)
1. The secretary will mail these letters tomorrow.
2. Someone ought to wash those dishes right away.
3. The factory produced 5000 cars every day.
4. People drink a great deal of tea in England.
5. Craftsmen make many beautiful objects of paper in Japan.
6. They used to sell medicine here.
7. You must return these books within two weeks.
8. The police arrested him for speeding.
9. Someone had locked the door.
Объяснение: