Present perfect/ Past perfect simple

                                   Affirmative                            Negative                        Interrogative
I                                   have/had                          haven't/hadn't                 have...?/ had...?
You                              have/had                          haven't/hadn't                 have...?/ had...?
He / She / It                 has/ had                            hasn't/hadn't                    has...?/ had...?
We                               have/had                          haven't/hadn't                 have...?/ had...?
You                              have/had                          haven't/hadn't                 have...?/ had...?
They                            have/had                          haven't/hadn't                 have...?/ had...?

-Time expressions:

JUST (acabar de...); I have just finished breakfast.

YET (negative) I haven't seen that film yet (todavía)
         (interrogative) Have you seen that film yet? (ya)

ALREADY (affirmative) I have already seen the film (ya)

EVER (interrogative) have you ever been to Paris? (alguna vez?
            (negative) I haven't ever seen a ghost (nunca)

NEVER (affirmative) I have never seen a ghost (nunca)