Normally the passive voice is constructed with the
verb "be" or "get" and then the past participle. However, there are
other similar verb constructions you should know about
have + the past participle
I have my oil changed once every three months.
or
get + the past participle
I get my oil changed once every three months.
Both sentences have the same meaning. What makes them
different from the passive voice is the word order
S + V + DO + V
Generally, when you use this word order, it sounds like you had
some kind of work done for you. You paid someone or got
someone to do something and you didn't do anything
He got his hair cut by a barber.
(A professional barber did the work.)
They had their house painted blue.
(Professional house painters did the work.)
She got her teeth cleaned by a dental hygienist