1870 passive causative explanation

TOP NOTCH 3, UNIT 3.
THE PASSIVE CAUSATIVE – “Have or Get something done”
The rule is:
Look at the next sentences.
I dry my hair.
I cut my hair.
I dye my hair.
My brother takes his clothes to the laundry.
He repairs his computer when it is broken.
He does his own shopping.
My father and my mother walk their dogs.
They cook dinner in their house.
They fix their clothes when the clothes are torn.
All of these actions are things that my parents, my brother and I do;
we are the people who do the actions.
There are some actions that we do not do, for example:
I don’t develop my photos.
My brother does not repair his shoes.
My parents do not deliver packages they send.
So, because we do not these actions, we ask people to do the actions for us.
We get the actions done. We have the actions done for us.
This is known as “passive causative”.
I get my photos developed.
He has his shoes repaired.
They get their packages delivered.
This structure is NOT a tense. We can use the structure in ANY tense, but now we will concentrate on
present and past.

PRESENT:
SUBJECT + HAVE / GET + OBJECT + PAST PARTICIPLE.
PAST

SUBJECT + HAD / GOT + OBJECT + PAST PARTICIPLE
We can also say WHO or WHERE we have the things done.
I had my photos developed at Sam’s.
He got shoes repaired by the shoemaker.
My parents had the packages delivered by Fedex.
AT is for PLACES
BY is for the people who do the actions for us.