PRESENT PERFECT

PRESENT PERFECT

https://agendaweb.org/verbs/present_perfect-exercises.html

https://agendaweb.org/verbs/present_perfect-tense-exercises.html

https://agendaweb.org/verbs/present-perfect-simple-exercises.html

ALREADY, JUST, STILL & YET
https://agendaweb.org/grammar/still-already-yet-intermediate-exercises.html

https://www.superprof.es/apuntes/idiomas/ingles/gramatica-inglesa/verb-tense/exercises-present-perfect-simple-yet-already-just.html

SINCE AND FOR
https://agendaweb.org/grammar/for_since_already-exercises.html