Chuyển các câu sau sang dạng khẳng định và nghi vấn: I am doing my homework

Chuyển các câu sau sang dạng khẳng định và nghi vấn 
1. I am doing my homework 
2. She isplaying the piano in her room
3. They are coming tomorrow
4. My sister is helping me with my homework 
5. I am trying to study because tomorrow I have an exam
6. She is speaking English with her friends
7. My brothers are typing the letters very fast