ENLACES CAUSATIVO

http://www.englishgrammarsecrets.com/havesomethingdone/exercise2.html

http://www.englishgrammarsecrets.com/havesomethingdone/exercise3.html

EJERCICIOS PASIVAS 3er. TIPO

http://storage.canalblog.com/13/92/207559/61469447.htm

PASIVAS

http://english4bachillerato.wikispaces.com/file/view/passive_3.pdf

ENLACES PASIVAS

EXPLANATION


http://www.fetsystem.com/englishgrammar/passive-voice-english-tenses

http://www.weblearn.in/active_passive/
https://www.ego4u.com/en/cram-up/grammar/passive


http://www.studyandexam.com/passive-voice-for-tense.html


http://www.e-grammar.org/passive-voice/




http://www.englishcorner.vacau.com/grammar/rules/passive.html (Pasivas, Indirecto, Condicional,etc.) MUY INTERESANTE

http://www.fetsystem.com/englishgrammar/passive-voice-english-tenses

http://www.studyandexam.com/passive-voice-for-tense.html

Reasons for using the passivehttp://www.monash.edu.au/lls/llonline/grammar/engineering/passive/1.1.xml


USE OF BY +AGENT
http://www.usingenglish.com/articles/use-by-agent-in-passive-voice.

htmlhttp://www.grammar-quizzes.com/passive1b.html


http://www.english-for-students.com/Passive-Voice-Without-Agent.html

https://www.rit.edu/ntid/rate/sea/processes/passive/grammatical/agents

https://www.ntid.rit.edu/sea/processes/passive/grammatical/agents

AMISH BBC

http://www.youtube.com/watch?v=wg81VwdRAVA&feature=related