The Perfect tense
The PERFECT tense is used to talk about something you have done. To form you use the following structure:
HABER + past participle
The parts of HABER in the present are:
he / has / ha / hemos / habéis / han
The past participle is formed by adding -ado to the stem of ar verbs, and by adding -ido to the stem of er and ir verbs. Both parts are then put together.
2. The Spanish perfect is used just as the English and is translated as ‘I have…’, ‘you have…’, ‘he has…’ etc.
They have arrived early.
Note - The past participle is invariable – it doesn’t change in spelling, only the corresponding part of HABER changes.
Note - The auxiliary HABER is never separated from the past participle.
Note – If the sentence is in the negative form, the NO goes before both parts of the perfect tense.