ответьте на следующие вопросы: 1. have you ever seen your father cook? 2. have you ever seen your mother play football? 3. have you ever seen your grandmother dance? 4. have you ever heard your friend speak chinese? 5. have you ever heard your father shout at his colleagues? 6. have you ever noticed your mother wear a short skirt? 7. have you ever noticed your friend hide anything from you? 8. have you ever seen anybody swim in the river in winter? 9. have you ever heard anybody sing opera arias at home? 10. have you ever watched anybody chat in internet three days without any interval?

1. Yes, I saw how my father cooked. He often prepares dinner.
2. No, because my mom does not like football.
3. Yes, she often dances on holidays.
4. Yes, very often, since his grandfather comes from China.
5. No, Dad never shout at his colleagues in my presence.
6. No, my mom does not like short skirts, she prefers skirts to the knee.
7. No, we have very open and warm relations. 
8. Yes, it was a company of young people.
9. Yes, I heard my sister singing, and I think that she's doing well.
10. Yes, it was my friend, I do not understand why she did not answer.