SOME SONGS WITH PRESENT PERFECT

With still:
U2 I still haven't found what I'm looking for.
http://youtu.be/BnD6ojjA0OA


Michael Bublé with yet
http://youtu.be/oBpvsSeBh54

SONG WITH FIRST CONDITIONAL

LISTEN TO PHARRELL WILLIAMS IN HIS SON HAPPY:

http://youtu.be/y6Sxv-sUYtM

TEHERE ARE SOME EXAMPLES OF 1ST CONDITIONAL.
AND YOU CAN LISTEN TO SHOULD AND TOO