Someone inserts a post or stake (pa--en) into the ground.
by driving in the pointed end
Pinatarok ni āmang parey no bengbeng na.
Father inserts the post of his field house.
Someone has someone (ipa-) insert a post, fence, etc.
Inpapatarok ko di āmang ahad no bahay ko.
I had father insert the (posts of the) fence of my house.
tarotarok
Someone or something (ma-) is the only one.