A pronoun takes the place of a noun. A prepostion is a word that introduces a phrase. A verb is an action word.
pronoun; he, they, it and so forth, instead of James, the cheerleaders, and the ball.
on, over, of, to, in, etc: In a prepostional phrase there is the preposition and an object.
verbs: think, do, run, is, etc.
I think as far as teaching a child, I'd give him a bunch of sentences and work with him on identifying which parts of speech the words are. Start with the most simple- The dog ran across the field. He ran across the field. The vase sat on the table.
It sat on the table. pronoun, verb, prepostional phrase with "on" as the preposition.
at 4:34 PM on Mar. 4, 2009