It ... (rain) for many days. I wonder when it will stop raining.
has been raining
How many tests ... (you have) this week?
have you had
My uncle ... (travel) around USA for six months.
has been travelling
They ... (see) six countries so far.
have seen
Jim ... (play) tennis since he was six.
havs been playing
I can't find my keys. I think I ... (lose) them.
have lost
How long ... (you have) the flu?
have you had
How long ... (you learn) to play the piano?
have you been learning
... (you ever have) an operation?
Have you ever had
He is completely exhausted. He ... (climb) for a few hours.
has been climbing
The glass is still full. He ... (not drink) his beer yet.
hasn't drunk
I'm sorry I'm covered in mud - I ... (work) in the garden all morning.
have been working
How many tests ... (have) so far?
have you had
Over the last month, I ... (train) hard for my next marathon - just today I ... (run) over 20 km.
have been training / have run
This is the third time you ... (cancel) on me. Do you want to go for lunch or not??
have cancelled
The lights in that office building ... (go) on and off all evening.
have been going
