***PRESENT PERFECT CONTINUOUS TENSE***
1. FORM

I We You They	have ('ve) haven't	been playing volleyball.
He She It	has ('s) hasn't

2. QUESTION

How long	have	I You We They	been playing the piano?
	has	He She It

3. SHORT ANSWER
a) Have you been singing?
- Yes, I have.
- No, I haven't.
b) Has he been working?
- Yes, he has.
- No, he hasn't.

5. USE

The Present Perfect Continuous is used	to express an activity which continues to the present present	to refer an activity with a result in the present
For example	I've been working here for years.	Liz is tired because she has been working all day.

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