Present Perfect Simple

1. I have walked. 
2. He has come. 
3. You haven't walked. (negativ)
4. Has he read the book? (interogativ)

Present Perfect Continuous

I have been reading this book for two days.
2. They have been talking for half an hour.
3. He hasn't been living in this town for five years. (negativ)
4. Have you been wrting this letter ? (interogativ)