THE PRESENT PERFECT CONTINUOUS TENSE
1. The Present Perfect Continuous tense is used to express continuous, ongoing actions which started in the past and are still going on:
Present Perfect Continuous, geçmişte belirli bir zamanda başlamış olan ve konuşma sırasında da devam eden eylemleri anlatmak için kullanılır. "For, since, ever since, all day, all week, all year" gibi zaman zarfları bu anlamdaki cümlelerde sıkça kullanılır.
I have been waiting for her since seven o'clock. (and I'm still waiting for her.)
We have been running for 15 minutes! Let's have a rest here.
B. STRUCTURE
Positive Structure:
I have
You have
He has
She has been working for two hours.
It has
We have
They have
Negative Structure:
I haven't
You haven't
He hasn't
She hasn't been working for two hours.
It hasn't
We haven't
They haven't
Question structure:
Have I
Have You
Has He
Has She been working for two hours?
Has It
Have We
Have They