Какие классы различают в типе Кишечнополостные?

1. He has never been to Novgorod.
2. My little brother has just cleaned his teeth.
3. I have just had lunch.
4. My father and I have taken our dog for a walk recently.
5. His grandfather has worked in the garden lately.
6. Our mother has just made coffee.
7. She hasn't met him yet.
8. They have just gone out.
9. My friends have played basketball this morning.
10. Been haven't cleaned the carpet.