The present perfect tense
The present perfect tense denotes action that is completed at
the time of speaking or writing. It may also indicate action that
is continuing into the present.
The present perfect tense is formed by combining the auxiliary verb
have or has with the past participle
of the principal verb. The auxiliary verb has is always
used in the fird person singular.
He has
spoken to the techer.
I have seen this film three times.