The present perfect tense refers to an action or state that either occurred at an indefinite time in the past (e.g., we have talked before) or began in the past and continued to the present time (e.g., he has grown impatient over the last hour). This tense is formed by have/has + the past participle.
The construction of this verb tense is straightforward. The first element is have or has, depending on the subject the verb is conjugated with.