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МатематикаВопрос:
8. How long... you ... (work) on this problem?
Ответ:
How long have you been working on this problem?
Похожие
- 4. It's a pity, but I (not buy) this dictionary yet.
- Упражнение 2. Раскройте скобки, чтобы получить Present Simple, Present Continuous или Present Perfect. 1. I must know what you (talk) about.
- 2. I hear that you (be) in this country for some time.
- 3. He (admire) you greatly. He (see) the play three times.
- 5. I want to see how much he (change) since I (see) him last.
- 8. I (think) you never (do) any harm to people?
- 9. She (rest) since two in the afternoon.
- 10. I always (stay) at home in the evenings.
- 11. I (hear) you (look) for a new house.
- Упражнение 3. Раскройте скобки, чтобы получить Present Simple, Present Continuous, Present Perfect Continuous или Present Perfect. 1. Is Andy here? - I don't know. I... (not see) him today.
- 3. Would you like... (borrow) this magazine? - No, thanks. I ... (read) it before.
- 4. Katy's bus ... (arrive) at 5 o'clock. I must go and meet her at the bus station.
- 6. He... (talk) to his friend for an hour already.
- 7. More and more forests... (disappear) because of fires nowadays.
