Here is the basic structure of it:
Have/ Has been+(Verb+ing)+for/since
I have been waiting for you for two hours.
He has been writing the story since Monday.
Have you noticed one thing?
It’s not difficult too much. Yes, you have to just add ‘not’ after the auxiliary verb ‘have/has’ in order to make negative. And like before, you must put the auxiliary verbs at the first of the sentence in interrogative form.
Negative Structure: (have/has +not+ been +(verb+ing)+for/since)
I have not been waiting for you for two hours.
He has not been writing the story since monday.
Has he been writing the story since monday?
I know, you have got a new thing in the structure of Present perfect Continues Tense for the first time. And it is the usages of ‘since/for’. Really, this is very much important fact in this tense. You have already noticed that the time is a special feature of Present perfect Continues tense. So, you must be confident of using these two prepositions- ‘since’ and ‘for’.
Usages of ‘Since’ and ‘For’
Usages of ‘for’:
If the time is period of time or indefinite, you have to use ‘for’ in structure.
For an example
I have been doing his work for 3 days.
(Here, the time ‘3 days’ is not definite that which 3 days of a week are. So, here, ‘for’ has been used.)
Usages of ‘since’:
If the time is point of time or definite, you have to use ‘since’ in structure.
For an example
I have been doing his work since Sunday.
(Here, the time ‘Sunday’ is the definite and particular name of a day in a week. So, here, ‘since’ has been used.)
If the time word is a definite figure from clock or calendars such as ‘10.00 a.m./Friday/January/2014‘, you will use ‘since’. But if the time word is not particular name or measurement such as ‘2 hours/3 days/5 years‘, you will use ‘for’ in sentences.
For more clear idea, notice these sentences:
- The boy has been working here for 5 years.
- (from which year to which is not definite)The boy has been working here since 2005.
- (the year is particular and definite)
- They have been playing football for 2 hours.
- (which 2 hours of 24 hours is not definite)They have been playing football since 4 p.m.
- (from when is definite)
An exceptional usage of Present perfect Continues
I (to be) in Rajshahi for 5 years.
I have been in Rajshahi for 5 years.He (to be) ill since last Sunday.
He has been ill since last Sunday.
Usages of Present Perfect Continuous Tense In practical life
When you want to express any continues action or event of present, you do it in present continues tense. But, if you get the ‘time marker word’ in sentences, you must translate those sentences into Present Perfect Continuous Tense.
Your brother has been watching Television for 2 hours.
I have been waiting here for you since 10.00 a.m.
So, no more today. I hope, you have understood the Present Perfect Continuous Tense clearly and now you can apply it in your language usages.
Thank you very much.