FUTURE PERFECT

 https://www.ef.com.es/recursos-aprender-ingles/gramatica-inglesa/future-perfect/

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

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

https://agendaweb.org/verbs/future-perfect-exercises.html

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

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