b Rewrite the sentences with a negative verb.

Решение:

Чтобы сделать предложение отрицательным в Past Simple, используем вспомогательный глагол did + not (сокращенно didn't) + инфинитив основного глагола (без -ed).

1. We stayed in a hostel. → We didn't stay in a hotel.
2. They bought some postcards. → They didn't buy any souvenirs.
3. The people were unfriendly. → The people weren't very helpful.
4. I swam in the sea. → I didn't swim in the swimming pool.
5. We rented a flat. → We didn't rent a car.
6. He spent a month in Bangkok. → He didn't spend a week there.

Ответ: 1. didn't stay; 2. didn't buy; 3. weren't; 4. didn't swim; 5. didn't rent; 6. didn't spend.