Here are the correct verb forms for the sentences:
- How do you feel? (Present Indefinite)
- Do you know what he is reading? (Present Indefinite and Present Continuous)
- I do not understand what she is saying. (Present Indefinite and Present Continuous)
- He doesn't see what the problem is. (Present Indefinite)
- He is sleeping now. He likes to sleep after dinner. (Present Continuous and Present Indefinite)
- She says she hears nothing. (Present Indefinite)
- Do you see the man who is standing near the window? He wants to speak to you. (Present Indefinite and Present Continuous and Present Indefinite)