Rules of Parts of Speech for Computer Project

This is probably a really dumb question, but I figure I will ask anyways. I am trying to write a computer program that parses a sentance and determines wether or not that sentance is grammatically accurate. What I need and for some reason, cant seem to find is some site or book or anything that can give me some rules for the english parts of speech. In specific, I need to know what parts of speech are allowed to follow other parts of speech and maybe what kind of exceptions i need to look out for. Ive found litterally thousands of sites giving me a description of what the parts of speech are, but no real information on valid word order or any kind of rules to that affect. I suppose what I should ask is, do rules for what I am looking for even exist? Or can any part of speech follow another? There has got to be some list of rules somewhere that govern why "John jumped the fence" is valid gramatically and why " Jumped fence john the" isnt. I never really had formal training in grammar, what I learned I learned just from listening to other people talk. And those grammar sites just dont make much sence. Does what I am asking make any sence at all? Or am I off my rocker?

Thanks,
Terra

If you don't mind my asking, Terra, which (programming) language do you intend to use?

MrP

Well, the very best of luck with it. You may be able to pick up a wordlist already tagged for parts of speech somewhere.

MrP

Maybe you should investigate in which point the order of the words in a sentence turns to an invalid sentence. I wonder why you are able to understand Yoda, for example, are his sentences in the right order? Maybe not in the perfect order, but even so, you can understand what he says.