Forms 8a, 8c. Passive voice

For practicing:

https://www.englisch-hilfen.de/en/exercises/active_passive/active_or_passive1.htm;

https://www.englisch-hilfen.de/en/exercises/active_passive/active_or_passive2.htm;

https://www.englishgrammar.org/active-passive-voice-exercise-8/;

https://www.english-grammar.at/online_exercises/passive-voice/pa010-active-passive.htm;

https://www.english-grammar.at/online_exercises/passive-voice/pa007-active-passive.htm;

https://www.englisch-hilfen.de/en/exercises/active_passive/sentences_gaps.htm;

https://www.ego4u.com/en/cram-up/grammar/passive/exercises?06;

For self-assessment:

https://www.english-grammar.at/online_exercises/passive-voice/pa011-active-passive.htm;

CAUSATIVE:

https://elt.oup.com/student/solutions/int/grammar/grammar_09_012e?cc=lt&selLanguage=en;

https://www.englishexercises.org/makeagame/viewgame.asp?id=1759;

https://www.usingenglish.com/quizzes/221.html;

https://www.esl-lounge.com/student/grammar/4g1-causative.php;

https://www.englishexercises.org/makeagame/viewgame.asp?id=7326.