Present perfect continuous/ progressive tense

We use has been  with only 3rd person singular. (He, she, it, Ali ) 
Since is used to talk about  Point of time . moring, evening, 2 pm, 4'0 clock, Monday, 2013 etc
 For  is usde to talk about  period of time . 2 hours, 10 minutes, 1 weeks, 2 years
Read  examples  sentences  of the present perfect progressive tense

Example sentences.
He has been playing since morning.
I have been waiting for her for 3 hours.

Structure of Present perfect continuous

Positive sentences

Sub	has/have	been	present participle
He	has	been	reading	for an hour.
She	has	been	dancing.
We	have	been	playing	since morning.

Negative sentences

Sub	has/have		been	present participle
He	has	not	been	reading	for an hour.
She	has	not	been	dancing.
They	have	not	been	playing	since morning.

Interrogative sentences

has/have	Sub	been	present participle
Has	she	been	reading	for an hour.
Has	it	been	raing?
Have	you	been	playing	since morning.

Using the present perfect  progressive/continuous tense:
1.We use the Present Perfect Continuous to  talk about some thing started in the past ant still continue.
Examples:

• It has  been raining since morning.
• He has been ridding on a bike for an hour .
• What have you been taking about  for 20 minutes on phone?
• Aslam  has been learning  in this college since March.
• We have been walking  for an hour  hours!
• Why has the patient not been taking his medicine regularly?