2) I've been studying English for 6 years.
3) I have left my purse in the bus.
4) She hadn't left the country before.
5) My pen has dissapeared.
6) I have read 150 pages so far.
7) Mary finished the composition.
8) I listened to this sound five times today.
9) He hadn't finished his homework yet.
10) We hadn't eaten something so delicious in a long time