Помогите перевести в отрицательную и вопросительную форму
Present
1. I am writing a letter now
2. Mike is riding a bike now
3. We are listening our teacher at this moment
Past
1. Children where going to the club yesterday at 3 o'clock
2. My mother was buying products 3 days ago at midday
Future
1. She will be doing her homework tomorrow at 4 o'clock