Passive exercises

http://www.juntadeandalucia.es/averroes/ipfacadiz/INGLES/2bejrein/2BEjReIn.htm

http://www.learnenglishfeelgood.com/sp/ingles-voz-pasiva1.html

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

With a double object:

http://oscus-teacher.blogspot.com.es/2011/02/voz-pasiva-ejercicios-2.html



Causative
http://www.juntadeandalucia.es/averroes/ipfacadiz/INGLES/2bejrein/2BEjRe13.htm

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

http://www.eoioviedo.org/anacarmen/passive/causative%20verbs.pdf

http://perso.wanadoo.es/autoenglish/gr.havdon.i.htm

http://mbonillo.xavierre.com/exercises/bch2/2bch2009/huesorph2bch1.htm

http://web2.uvcs.uvic.ca/courses/elc/studyzone/490/grammar/causatives1.htm

http://web2.uvcs.uvic.ca/courses/elc/studyzone/490/grammar/causatives2.htm