Мы слушали очень интересную лекцию 6 часов вчера

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1. утвердительное предложение

2. Общий вопрос

3. Отрицательный вопрос

4. Утвердительно-отрицательный вопрос

5. Разделительный вопрос

6. Специальный вопрос

7. Альтернативный вопрос

We were listening to a very interesting lecture at 6 o'clock yesterday

Were we listening to a very interesting lecture at 6 o'clock yesterday?

Weren't we listening to a very interesting lecture at 6 o'clock yesterday?

We were listening to a very interesting lecture at 6 o'clock yesterday, didn't we?

What were we listening at 6 o'clock yesterday?

Were we listening to a very interesting or boring lecture at 6 o'clock yesterday?