Have something done is used to show that something is done for us, we do not do it ourselves. Compare these two sentences:
"I washed my car." - I washed my car myself.
"I had my car washed." - I paid someone to wash my car for me.
We can also use the form"I got my car washed." The difference between have and get is that have is more formal than get.
Subject + Have + Object + Past Participle Verb:
I (subject) had (have) my car (object) washed (past participle verb).
Change these verbs into the past participle and them use them to complete the sentences: