Have something done
- "I have my flat cleaned once a week."
This uses the passive voice; past participle. As it is in the a passive voice, the subject of the sentence is not the agent. The implication is that subject of the sentence doesn't do the task, but arranges for someone else to do it. The agent may be specified by using a prepositional phrase with "by", e.g. "I have my flat cleaned once a week by my cleaner". Note we can't say #"I have my flat cleaned once a week by me/myself."