PRESENT CONTINUOUS

AFIRMATIVE: subject + verb + -ING form
                        I         AM  
                     YOU
                     WE       ARE    SERVENING
                     THEY
                     HE
                     SHE        IS
                      IT

NEGATIVE: subject + be + not + verb
                     I          AM   NOT
                  YOU
                  WE        ARE  NOT  SERVENING
                  THEY
                  HE
                  SHE        IS     NOT
                  IT

QUESTION: be + subject + -ING form
                 AM       I
                           YOU
                 ARE    WE        SERVING?
                           THEY
                           HE
                 IS       SHE
                           IT
USE:
We use the present continuous to talk about what´s happening now
SHORT FORMS:
AM NOT ------- ´M NOT
IS   NOT -------   ISN´T
ARE NOT ------  AREN,T