Forms 7a, 7c1, 7c2. Present Perfect

For practicing:

https://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_statements.htm;

https://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_negation.htm;

https://www.englisch-hilfen.de/en/exercises/questions/present_perfect.htm;

https://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_mix.htm;

https://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_mix2.htm;

https://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises;

https://www.really-learn-english.com/present-perfect-exercises.html;

https://www.perfect-english-grammar.com/present-perfect-exercise-4.html;

https://www.perfect-english-grammar.com/present-perfect-exercise-5.html.
Quiz:
https://www.englishclub.com/grammar/verb-tenses_present-perfect_quiz.htm.