1. I have read this book
2. he has written a interesting letter .
3. She has forgotten about her homework
4. We have walked in the park recently.
5. Have you done your housework ?
6. Has he won the first place.
7. They have gone to the seaside , haven't they ?
8. He hasn't got the letter .
9. Have you sent a the letter
10. We haven't smoked , have we ?