In sentences, we seldom use "I can have it arrange" ...etc.My question is do i need to use first form of verb in the verb "arrange"? because the sentence is Present Indefinite.
NOT A TEACHER
(1) May I just add a few comments to the moderator's excellent answer?
(2) (a) I can have someone arrange it.
(b) I can have it arrangED.
If you wish to express the idea by using sentence (b), you need to use the
past participle. It is being used as an adjective to modify (refer to) the
word "it." When you have time, check your books for so-called objective
complements. In your sentence, "it" is the object. But if you said only "I
can have it," maybe your listener would be confused. You need a word to
"complete" (complement) the meaning, so you add "arranged."
For example: "I had the food" doesn't complete my meaning. So I could say "I had the food cookED/ caterED/ destroyED."
(3) When you get time, also check out causative verbs.
I credit two books for their guidance:
The Grammar Book by Mesdames Celce-Murcia and Larsen-Freeman.
English Review Grammar by Mr. Walter Kay Smart