Have you ever eaten anything exotic?
I have eaten ... // I have never eaten anything exotic.
Have you ever been on another continent?
I have been to... // I have never been on another continent.
What has happened to him?
He has broken his leg.
What has happened to him?
He has cut his finger.
What has happened to her?
She has won a competition.
What has just happened?
He has broken the window.
What have you done today?
I have had breakfast. / I have brushed my teeth....
Have you ever met someone famous?
I have met ... // I have never met someone famous.
Why is the boy in trouble?
His dog has eaten his homework.
What has happened to him?
He has got a dog for his birthday.
What have they done?
They have cleaned the house.
Have you ever tried an extreme sport?
I have tried bungee jumping. // I haven't tried any extreme sports.