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            Perfect-Progressive Tenses


Present Perfect Progressive Tense verbs express continuing actions that have recently been finished or that began in the past and continue now.       

             The present perfect-progressive tense is created with the auxiliary verbs

          has been or have been  plus a present participle (verb with an ing    

          ending). 

             

              I have been studying for my exam.

              Lizzy has just been swimming, and her hair is wet.

              Susan and Jacob have been working on their project all day.

              He has recently been traveling, so he has a lot to catch up on this weekend.


Past Perfect Progressive Tense verbs express continuing actions that ended at some point in the past or that ended before another past action.

          The past perfect-progressive tense is created with the auxiliary verbs

          had been plus a present participle (verb with an ing ending).  


           I had been studying last night in the library when the fire alarm went off.

               Susan and Jacob had been working on their project earlier.

               Leo had been jogging regularly, but he stopped because the weather turned cold.


Future Perfect Progressive Tense verbs express continuing actions that will be completed in the future.

          The future perfect-progressive tense is created with the auxiliary verbs

          will have been plus a present participle (verb with an ing ending).  


              I will have been studying for seven straight hours when I go to class to take the test.

              Scientists will have been researching the disease for an unknown number of years when they finally

                         discover a cure.