1. I help for my friend right now.
2. I don’t help for my friend right now
3. Am I helping my friend now?
4. They watchеd TV yesterday at 5 o’clock
5. They didn't watch TV at 5 o'clock yesterday
6. Did they watch TV at 5 o'clock yesterday?
7. she will solve examples tomorrow at 3 o'clock
8. she won't(will not) solve examples tomorrow at 3 o'clock
9. will she solve examples tomorrow at 3 o’clock