PRESENT PERFECT CONTINUS

S + has/have + been + present participle (+)
S + has/have + been + not + present participle (-)
Has/have + S + been + present participle? (?)

Examples:
•I have been studying here for two hours.
•Have I been studying here for two hours?
•I have not been studying here for two hours.


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 which can be used with the Present Perfect Continuous.

Examples:
•James has been teaching at the school since August.
•We have been waiting here for an hour

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." We often use the words "lately" or "recently" to emphasize this meaning.
Examples:
•Recently, I have been feeling so tired.
•She has been watching tha movie lately.
•Lisa has not been practicing her English skill.

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.