15945 present perfect simple

PRESENT PERFECT SIMPLE
RULES

IT IS USED TO TALK ABOUT AN EVENT / A SITUATION THAT:
 TOOK PLACE IN THE PAST AND IS PART OF ONE’S
EXPERIENCE:
EX: They have been to China!
 HAS JUST FINISHED AT THE TIME OF SPEAKING:
EX: I have just read the lastest book from Harry Potter.
 IS FINISHED AT THE TIME OF SPEAKING OR HAS
COMPLETELY FINISHED BUT IS IMPORTANT NOW:
EX: I see, you have bought a new laptop!