Question

what is the structure of Present Perfect Continuous Tense , Past Perfect Continuous Tense and Future Perfect Continuous Tense ​

Answer 1

Answer:

Present Perfect Continuous tense : we refre to, action that started in past and still continued in the present. Sentence structure is S + (have been) + Ving + Object. Past Perfect Continous Tense : we refer to past incomplete action with resptect to another. here, duration of action is given importance.

Answer 2

Answer:

present perfect continuous-sub+has been/have been+m.v+ing+object+since/for.past perfect continuous-sub+had been+m.v+ing+object+since/for. future perfect continuous-sub+will have been/shall have been+m.v+ing+object+since/for.