The time for carrying out the action has not ended. For example:
negative structure
what is the affirmative structure?
How many structures does the present perfect have?
interrogative structure
The action started in the past and continues...
short form
Subject+auxiliary verb (have)+Not+Verb in participle+Complement
in the present
They have gone to swim twice a week
affirmative, negative and interrogative
Subject+Auxiliar verb+Short form+Verb in participle
Auxiliary verb (have/has)+Subject+Verb in participle+Complement
Subject+Auxiliary verb (have/has)+Verb in participle+Complement