Past perfect:
1 I had never seen such a beautiful beach before I went to Kauai.
2 I did not have any money because I had lost my wallet.
3 Tony knew Istanbul so well because he had visited the city several times.
4 Had Susan ever studied Thai before she moved to Thailand?
5 She only understood the movie because she had read the book.
6 Kristine had never been to an opera before last night.
Present perfect :
1 I have seen that movie twenty times.
2 I think I have met him once before.
3 There have been many earthquakes in California.
4 People have traveled to the Moon.
5 I’ve played the guitar ever since I was a teenager
