Present Continuous X Present Perfect Continuous

Present Continuous                            Present Perfect Continuous

             I am doing.                                                                            I have been doing

                now                                                      -------------->  Now

Don't disturb me now. I'm working.                          I've been working hard. Now I'm going.



Present Continuous:  ação continua no presente.                            

Present Perfect Continuous: ação que começa no passado próximo e acabou  a pouco tempo ou ainda está acontecendo.


* Enviem duvidas para este post.