Which one is correct and why? " Let's have him do it. " Or " Let's have him does it. " Since it's " him " I think it should be does but I'm not sure..
To have + somebody + do something (infinitive without to) means 'to get somebody to do something':
Bruno had Icarus check last year's figures. Bruno got Icarus to check last year's figures.
They would have Icarus do all the work himself, if they could. They would let Icarus do all the work himself, if they could.
I have the gardener take care of everything. The gardener takes care of everything, at my request.
Horatio had the test monkeys drive him around the city. Horatio got the test monkeys to drive him around the city.
Careful here not to confuse your verbs: - to have someone do sthg - this construction means that we decline the "to have" part and not the "do" part - this remains the same - compare these examples:
- let's have him do it
- she has him do it
- I have him do it
- he had her do it