GRAMMAR:

http://www.myenglishpages.com/site_php_files/grammar-lesson-passive-voice.php

(HAVE + SOMETHING + DONE)

https://www.really-learn-english.com/have-something-done.html

https://grupovaughan.com/a/la-pasiva-con-to-have-something-done/ (SPANISH)

https://www.aprendeinglessila.com/2013/10/la-forma-causativa-en-ingles-have-get/ (SPANISH)

ACTIVITIES:

Passives:

http://isabelperez.com/hotpot/dogphone.htm

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

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

https://www.curso-ingles.com/practicar/ejercicios/the-passive-voice

https://www.englishcurrent.com/exercises/passive-voice-exercises/

https://www.superprof.es/apuntes/idiomas/ingles/gramatica-inglesa/clauses/exercises-passive-voice-in-present-simple-and-continuous-i-2.html

In this page, you can choose among many activities:

http://www.ego4u.com/en/cram-up/grammar/passive

HAVE SOMETHING DONE (Causative have):

http://www.ego4u.com/en/cram-up/grammar/participles/exercises?08

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

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

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

http://www.focus.olsztyn.pl/en-causative-have-exercises-online.html#.Xrut6sBS_IU

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-119087.php

http://www.englishgrammarsecrets.com/havesomethingdone/menu.php

http://www.autoenglish.org/modalverbs/havedone.htm

http://www.autoenglish.org/modalverbs/gr.havedone.pdf