SINCE AND FOR

1. http://www.focus.olsztyn.pl/en-present-perfect-continuous-for-since.html#.XiAuQv5KiUk   (FOR AND SINCE )
2.  https://www.ecenglish.com/learnenglish/lessons/present-perfect-with-for-and-since
3. https://www.english-4u.de/en/tenses-exercises/for-since2.htm

SINCE , FOR, JUST, ALREADY, NEVER...

1. http://www.carmenlu.com/second/grammar/presentperfect2_2.htm
2. http://www.autoenglish.org/gr.presper.i.htm

PAST SIMPLE V PRESENT PERFECT

1. https://www.englisch-hilfen.de/en/exercises/tenses/simple_past_present_perfect.htm
2. https://www.english-4u.de/en/tenses-exercises/perfect-past-simple.htm
3. https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-73643.php