Grammar: have something done

Do you know the diference between:

he has cut his hair and he has had his hair cut ?

Read the explanation.

Now try these exercises:

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

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

http://www.bbc.co.uk/worldservice/learningenglish/radio/specials/1223_gramchallenge9/

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

http://www.ecenglish.com/learnenglish/lessons/have-something-done