present perfect continuous tense present perfect progressive tense use of since and for

in this video we will study about present perfect continuous tense has /have +been+ v1+ing this video important for all classes English grammar
#presentperfectcontinuoustense
#tenses
rules of present perfect continuous tense are
1) to express an action that started in the past and is continuing at present
2)to express an action that started in the past and has stopped recently
3) for an action repeated over a period of time
keywords : all day ,for,since, the whole, recently‪@rubyacademy7787‬