An ELT Glossary : Causative verbs : have and get

  • I had my hair cut yesterday.
  • John' out at the moment. He's getting the car repaired.

Structure : have/get (in the appropriate form) + noun phrase + past participle

Both of these examples are active verbs but, unlike in most active sentences, the subject of the verb is not the person that performed the action (the agent) but someone who caused someone else to do so. 

And for some teaching suggestions...

Scrivener, J. Teaching English Grammar, Macmillan