6º: Grammar Past perfect

 First, let´s practice the structure of the past perfect:

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

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

http://www.adelescorner.org/grammar/past_perfect/past_perfect.html

Then, do these exercises choosing between past simple or past perfect:

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

https://www.examenglish.com/grammar/B1_past_perfect.htm

http://www.focus.olsztyn.pl/en-past-simple-vs-past-perfect.html

https://www.english-grammar.at/online_exercises/tenses/t110-past-past-perfect.htm