PRESENT PERFECT CONTINUOUS TENSE

 

A. Affirmative: Subject + has/have + been + ing with 1st form of Verb + object + since/for + time. B. Negative: Subject+ has/have + not + been + ing with 1st form of Verb +object +since/for +time. C. Interrogative: Has/Have + subject + been + ing with 1st form of Verb + object + since/for + time?

‘Since’ is used for definite time and ‘for’ for indefinite time.

Conditions involving this tense:-

1.  It is used to indicate an event or action which began in the past and is going on continuously up to the present and with time is given:

a.  I have been living in this street for the last four years.

b.  He has been holding this office since January, 2000.

2.  It is also used to explain such an event or action that begins with ‘Since when’ or ‘For how long’:

a.  Since when have you been living in this house?

b.  For how long have you been waiting for me?