Grammar | The Present Perfect Continuous Tense

English Grammar.

The Present perfect continuous tense

1- THE PRESENT PERFECT CONTINUOUS JOINTLY EXPRESSES LIMITED DURATION incompletely AND CURRENT:

   _ Relevance ( action still going on).

   - She has been studying English for 10 years.

   - It has been snowing since last Monday.

2- THE PRESENT PERFECT CONTINUOUS ALSO EXPRESS A RESENT ACTIVITY, THE EFFECTS OF WHICH ARE OBVIOUS Resent Past + Result of the action:

    - Look the ground is wet, it has just been raining.

    - You look very tired! I have been working all day.

    - What a mess here! I have been painting the house.

3- THE DIFFERENCE BETWEEN THE PAST SIMPLE AND THE PRESENT PERFECT CONTINUOUS:

THE BASIC DIFFERENCE BETWEEN THE Simple Present Perfect AND THE The Present Perfect Continuous Tense  IS THAT THE  LATER INSISTS ON THE CONTINUITY OF THE ACTION WHEREAS THE FORMER INSISTS ON THE COMPLETION OF THE ACTION.

    - I have been reading this novel since 20 clock.

    - I have read 30 pages from this novel.

    - I have been student English for 3 years.

    - I have studied English for 3 years.

4- THE PRESENT PERFECT CONTINUOUS  CAN ALSO EXPRESS REPETITION:

    - He has sat on this chair for 2 hours.

    - He has been sitting on this chair for 2 hours.

5- THE PRESENT PERFECT CONTINUOUS CAN ALSO EXPRESS REPETITION BUT UNLIKE THE Present Perfect Simple CANNOT EXPRESS THIS TYPE OF ACTION UNLESS THE NUMBER OF TIMES THE ACTION IS MENTIONED:

     - I have been writing letters since breakfast.

     - I have written 6 letters since breakfast.