1.
B: I have signed in a concert and I have played the piano too.
2.
A: My cousin has had a lot of accidents, but she has never broken her arm or leg.
B: That's lucky! My brother has broken his leg twice.
3.
A: I have never met anybody famous, have you?
B: Well, I have played football with Cristiano Ronaldo.
A: Really? Where?
B: On a computer game!
4.
A: I have never gone to New York, have you?
B: Yes, I have gone there twice!