1) 1. It sometimes snows here in April. 2. It's snowing now. 3. It snowed yesterday. 4. Every morning mother cooks breakfast for us. 5. It is 8 o'clock now. Mother is cooking breakfast. 6. Mother cooked borsch last weekend. 7. We often watch TV. 8. Now we're sitting in armchairs and watching TV. 9. We watched this film last Sunday.
2) 1. We're not going to school now. 2. What do you do after school? 3. Last year Peter worked in Russia. 4. Does he have a new car? 5. He isn't wearing a hat at the moment. 6. He didn't like black coffee when he was a child. 7. What are you doing now? 8. It is raining at the moment.
3) 1. Общий: Is it showing now? Альтернативный: Is it snowing or raining now? Разделительный: It is snowing now, isn't it? Специальный: What is the weather now?
2. Общий: Did mother cook borsch last weekend? Вопрос к подлежащему: Who cooked borsch last weekend? Специальный: What did mother cook last weekend? Разделительный: Mother cooked borsch last weekend, didn't she?