Explanation
The present perfect continuous tense represents something that started in the past and is continuing at the present time. To put it simply, the present perfect continuous is used to indicate an unspecified time between 'before now' and 'now'. This tense is formed using the below construction-
Has /have been + the present participle (root + -ing)
E.g.: I have been reading Sherlock Homes currently
E.g.: He has been running the marathon now
All grammar rules for forming the present perfect continuous tense
a) In Present Perfect Continuous Tense, we use the helping verb 'has been/have been'
e.g.: She has been watching a movie
b) To make the present perfect continuous tense, we add 'Ing' with the first form of Verb.
E.g.: We have been play (ing) football
c) During the making of the present perfect continuous tense, we use 'Since or for' for a time.
Word “Since’ is used when the time mentioned in the sentence is certain
E.g.: Joe has been running the race since 2’o clock
Word ‘For’ is used when the time mentioned in the sentence is not certain.
e.g.: They have been singing at the concert for many hours
d) For the verbs not normally used in the continuous form, we use the simple present perfect instead
(Examples of such verbs: know, hate, hear, understand, want)
e.g.:
I've wanted to visit Disneyland for years.
They've hated that music since they first heard it.
We've understood everything.
Subject + has / have been + base +ing
Affirmative sentence
Subject + has / have been + base +ing
e.g.: She has been swimming
Negative sentence
Subject + has / have been +not base +ing
e.g.: She hasn't not been swimming
Interrogative sentence
Has/ Have + Subject + base+ ing
e.g.: Has she been swimming?
a) This tense is used to talk about the past action that stopped recently
e.g.: I'm so tired because I've been running.
b) This tense is used to talk about an action that started in the past and is continuing now.
e.g.:
They've been studying since 2 o'clock
Joe has not been smoking
c) This tense is used with for and since with perfect tenses
E.g.:
Joe has been living in England since he left India
I have been playing cricket since 7 am.
