I have had my computer for three years.
I have watched the television for seven hours this week.
The Voice is the best television programme I have seen this week.
I am tired because I have been cooking all morning.
This week I have run across my friend.
I have just read a thrilling story in this book.
I haven't been to the cinema this month yet.
I have known my best friend for ten years.
I have been living in the same flat for five years.