Causing something to be done by someone else is expressed by HAVE or GET with a past participle.
15.1 Reword the following sentences using HAVE or GET with a past participle (intermediate/advanced).
Causative uses of TO HAVE or TO GET are similar to the "passive voice" with TO BE (see lesson 52). There are four "forms"
1) HAVE + object + past participle (have something done)
We usually use 'have something done' when we are talking about paying or persuading someone to do something for us.
2) GET + object + past participle (get something done)
We can also use 'subject + get + object + past participle'. This has the same meaning as 'have', but is less formal.
3) HAVE someone do something (have + person + infinitive)
This has a very similar to form 1, but this time we say who did the thing.
4) GET someone to do something (get + person + to + infinitive)
Again, this means that you cause the other person to do the action, maybe by paying them to do it, or by asking them to do it.
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