Present perfect continues tense

The present perfect continues tense shows that the action begun in the past is continuing up to the present time;

E.g.

* It has been raining since midnight.
* I have been reading since seven o’clock.
* You have been helping me for five years.
* We have been talking for three hours.

Rule:- subject + have / has + been + root verb + ing

Examples:

* He has been in U.S since 1980.
* She has been teaching English for ten years.
* It has been crying for two hours.
* They have been working together since 1991.
* Tom has been playing cricket for two hours.
* Boys have been making noise since the teacher left.
* The mechanic has been overhauling the car for two days.
* The tailor has been sewing clothes for thirty years.
* The doctor has been operating the patient for two hours.
* Our dog has been barking since midnight.
* I have been looking forward to your letter since Monday.
* The passengers have been waiting for the train for an hour.