contoh kalimat present perfect

I have seen that movie twenty times.I think I have met him once before.There have been many earthquakes in California.People have traveled to the Moon.People have not traveled to Mars. Have you read the book yet? Nobody has ever climbed that mountain.A: Has there ever been a war in the United States?
B: Yes, there has been a war in the United States.

She has cooked at kichen
They have played this game for several times
She has done her homework