Form 6b. Present Perfect vs Past Simple

For practicing:

https://www.perfect-english-grammar.com/present-perfect-exercise-1.html;

https://www.perfect-english-grammar.com/present-perfect-exercise-2.html;

https://www.perfect-english-grammar.com/present-perfect-exercise-3.html;

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

https://www.perfect-english-grammar.com/present-perfect-exercise-5.html;

https://www.perfect-english-grammar.com/past-simple-present-perfect-1.html;

https://www.perfect-english-grammar.com/past-simple-present-perfect-2.html;

https://www.perfect-english-grammar.com/past-simple-present-perfect-3.html.

Quiz:
https://www.englisch-hilfen.de/en/exercises/tenses/simple_past_present_perfect.htm.