It is used to tell about things which continue to happen over a long period of time.
Example
- Due to fog, trains have been running late.
- To prevent flu,she has been taking precautions
In this case,we use " have been " or " has been " with the verbs
Rules for Present Perfect Continuous
Fill with appropriate Present Perfect Continous Tense
I.........(go) to mall
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I have been going to mall
She........(date) him
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She has been dating him
We..........go for walk together.
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We have been going for walk together.
I..........(report) to her
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I have been reporting to her
Rohan.............(drink) too much
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Rohan has been drinking too much
Comparison with Simple Present, Present Continuous, Present Perfect and Present Perfect Continous