People have traveled to the Moon.
I think I have met him once before.
Nobody has ever climbed that mountain.
I have been to France three times.
There have been many earthquakes in California.
The rain hasn't stopped.
I have seen that movie twenty times.
Hasn't she visited her friend yet?
Have they walked under the rain?
Have you only seen that movie one time?
Have you read the book yet?
She hasn't visited her mother today.
James has not finished his homework yet.
Susan hasn't mastered Japanese, but she can communicate.
I have had not four quizzes and five tests so far this semester.
Bill has still not arrived
Have you been to Mexico in the last year?
Has there ever been a war in the United States?