1 - It's my friend's birthday and I haven't BOUGHT her a present. 2 - They are having a party tomorrow. They've INVITED a lot of friends. 3- It's only eight o'clock and Nick has already GONE to bed. 4- Has your uncle ever BEEN to Australia? 5 - Who's that man? I've never SEEN him before. 6- She has LIVED in many places. 7 - My teacher has never TRAVELLED by air. 8 - How many times has Argentina WON the World Cup ? 9 - My father has HAD this car since May. 10 - I've KNOWN him for a long time.