17. Complete the sentences (1, 2 or 3 words). 1) Mark and Sarah are married. They ___ married for five years. 2) David has been watching TV ___ 5 o’clock. 3) Joe is at work. He ___ at work since 8:30. 4) ‘Have you just arrived in London?’ ‘No, I’ve been here ___.’ 5) I’ve known Helen ___ we were at school together. 6) ‘My brother lives in Los Angeles.’ ‘Really? How long ___?’ 7) George has had the same job ___ 20 years. 8) Some friends of ours are staying with us at the moment. They ___ since Monday.

Перевод задания: Дополните предложения, используя от одного до трёх слов.

1. They have been married for five years. — Они женаты пять лет.
2. David has been watching TV since 5 o’clock. — Дэвид смотрит телевизор с пяти часов.
3. He has been at work since 8:30. — Он на работе с 8:30.
4. No, I’ve been here for five days. — Нет, я здесь уже пять дней.
5. I’ve known Helen since we were at school together. — Я знаю Хелен с тех пор, как мы вместе учились в школе.
6. Really? How long has he lived there? — Правда? Как давно он там живёт?
7. George has had the same job for 20 years. — Джордж работает на одной и той же работе уже 20 лет.
8. They have been here since Monday. — Они здесь с понедельника.

Кратко о правиле: since указывает, с какого момента длится действие, а for — как долго оно длится. Для продолжающихся состояний и действий употребляется Present Perfect или Present Perfect Continuous.