CAUSATIVE FORM

1- HAVE SOMETHING DONE
We can use the construction HAVE SOMETHING DONE to say that something is done for us because we arrange or ask for it to be done, instead of doing it ourselves.
The action to be done is always expressed in the past participle.
I had(to have) a wisdom(object) tooth pulled(past participle) yesterday.

2- HAVE SOMEONE DO SOMETHING
When we want to say that someone does something for us because we ask him or her to do it and when we want to emphasize who it is that we ask, we use the construction: HAVE SOMEONE DO SOMETHING.
The action to be done is always expressed in the infinitive without to.
Mary's having John wash her car.

3- GET SOMEONE TO DO SOMETHING
We can use the construction GET SOMEONE TO DO SOMETHING to say that someone does something for us because we persuade or convince him or her to do it.
I got my mother to take me to the movie.