Present Perfect Simple or

Continuous
Often there is very little difference
between the present perfect simple
and the present perfect continuous.
In many cases, both are equally
acceptable.
They've been working here for
a long time but Andy has
worked here for even longer.
I've lived here for 10 years and
she has been living here for 12
years.
To emphasize the action, we use the
continuous form.
We've been working really
hard for a couple of months.
She's been having a hard time.
To emphasize the result of the action,
we use the simple form.
I've made fifteen phone calls
this morning.
He's written a very good
report.
Look at the difference in these
examples.
I've been reading this book for
two months but I've only read
half of it. It's very difficult to
read.
She's been trying to convince
him for 20 minutes but she
hasn't managed to yet.
They've been talking about this
for month and they still haven't
found a solution.
When an action is finished and you
can see the results, use the
continuous form.
The phone bill is enormous.
You've been calling your
boyfriend in Australia, haven't
you?
You're red in the face. Have
you been running?
When you use the words 'ever' or
'never', use the simple form.
I don't know them. I've never
met them.
Have you ever heard anything
so strange in your lif