Present Perfect ContinuousFORM
[Has / have + been + present participle]
Examples:

    You have been waiting here for two hours.
    Have you been waiting here for two hours?
    You have not been waiting here for two hours.
Complete List of Present Perfect Continuous FormsUSE 1 Duration from the Past Until Now
We use the Present Perfect Continuous to show that something started in the past and has continued up until now. "For five minutes," "for two weeks," and "since Tuesday" are all durations roomates can be used with the Present Perfect Continuous.
Examples:

    They have been talking for the last hour.
    She has been working at that company for three years.
    What have you been doing for the last 30 minutes?
    James has been teaching at the university since June.
    We have been waiting here for over two hours!
    Why has Nancy not been taking her medicine for the last three days?
USE 2 Recently, Lately
You can also use the Present Perfect Continuous WITHOUT a duration such as "for two weeks." Without the duration, the tense has a more general meaning of "lately." Often we use the words "lately" or "recently" to emphasize this meaning.
Examples:

    Recently, I have been feeling really tired.
    She has been watching too much television lately.
    Have you been exercising lately?
    Mary has been feeling a little depressed.
    Lisa has not been practicing her English.
    What have you been doing?
IMPORTANT
Remember that the Present Perfect Continuous has the meaning of "lately" or "recently." If you use the Present Perfect Continuous in a question such as "Have you been feeling alright?", It can suggest that the person looks sick or unhealthy. A question such as "Have you been smoking?" can suggest that you smell the smoke on the person. Using this tense in a question suggests you can see, smell, hear or feel the results of the action. It is possible to insult someone by using this tense incorrectly.REMEMBER Non-Continuous Verbs / Mixed Verbs
It is important to remember that Non-Continuous Verbs can not be used in any continuous tenses. Also, certain non-continuous meanings for Mixed Verbs can not be used in continuous tenses. Instead of using Present Perfect Continuous with these verbs, you must use the Present Perfect.
Examples:

    Sam has been having his car for two years. Not Correct
    Sam has had his car for two years. Correct
Adverb PLACEMENT
The examples below show the placement for grammar adverbs such as: always, only, never, ever, still, just, etc..
Examples:

    You have only been waiting here for one hour.
    Have you only been waiting here for one hour?
ACTIVE / PASSIVE
Examples:

    Recently, John has been doing the work. Active
    Recently, the work has been being done by John. Passive
NOTE: Present Perfect Continuous is less commonly used in its passive form.
More About Active / Passive FormsExercises AND RELATED TOPICS

    Verb Tense Exercise 7 Present Perfect and Present Perfect Continuous
    Verb Tense Exercise 8 Present Perfect and Present Perfect Continuous
    Verb Tense Exercise 9 Present Continuous and Present Perfect Continuous
    Verb Tense Exercise 10 Present Continuous and Present Perfect Continuous
    Verb Tense Exercise 14 Present Perfect, Past Perfect, Present Perfect Continuous, and Past Perfect Continuous
    Verb Tense Exercise 15 Tenses with durations
    Verb Tense Exercise 16 Present and Past Tenses with Non-Continuous Verbs
    Verb Tense Exercise 17 Present and Past Tense Review
    Verb Tense Practice Test Cumulative Verb Tense Review
    Verb Tense Final Test Cumulative Verb Tense Review