Tenses ( present perfect continuous )


Present perfect continuous
Declarative -
       subject + has/have + been + Ving
        I have been writing my homework since morning.
           He has been reading the book for two hours.
Yes/no -
    has/have + subject + been + Ving
       Have I been writing a book?
    Has he been reading the book since morning ?
W.h. word question -
         w.h. word + has/have + subject +been + Ving
            What have I been writing ?
     Where has he been reading the book ?
Negative -
subject + has/have + not + been + Ving
             I have not been writing a book.
          He has not been reading the book.

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