1. He has got a lot of friends. Отрицательное: He hasn't got a lot of friends. Вопросительное: Has he got a lot of friends? Краткий ответ: Yes, he has. / No, he hasn't.
2. We are swimming now. Отрицательное: We aren't swimming now. Вопросительное: Are we swimming now? Краткий ответ: Yes, we are. / No, we aren't.
3. She likes pizza. Отрицательное: She doesn't like pizza. Вопросительное: Does she like pizza? Краткий ответ: Yes, she does. / No, she doesn't.
4. They cooked dinner yesterday. Отрицательное: They didn't cook dinner yesterday. Вопросительное: Did they cook dinner yesterday? Краткий ответ: Yes, they did. / No, they didn't.