Animosophy wrote:

I have a few questions/statements I'd like double checked to confirm my understanding

わたしがいったことをしんじますか？
わたしがいったことはしんじますか？

Is the difference between these two questions somewhere along the lines of asking whether someone believes IN what I said, and believing WHAT I said, respectively?

No; the difference between を and は here is hard to express in an English translation, and without context you can't really say what the difference is or which one should be used.  It's hard to explain in a short time but basically:

私が言ったこと、信じますか？  With no particle it's the most neutral sentence, with no particular emphasis or connotation anywhere.  Formal written language does not allow the "zero particle" but it's used constantly in speech.
私が言ったことを信じますか？ The を particle, like が, is typically used to mark new information that you are emphasizing.  Sometimes it has a meaning close to "only" (though probably not here), and often the verb is something that's already known -- you're specifying the target of the verb. 
私が言ったことは信じますか？  The two normal uses of は are to mark a known topic, or to show contrast (or sometimes both).  So this could be "Do you at least believe what I'm saying [even if you don't believe what I'm doing, or what other people are saying, etc.]?"  Or just "The things I said [which we've already been talking about], do you believe them?"

- The subject of a sentence can only be noun.

- Verbs cannot grammatically serve as a topic, subject, or object of a sentence, so you can't use は or が or を after a verb.

More or less true -- は can go after certain conjugations of verbs but 言ったは would always be bad.

Last edited by yudantaiteki (2013 May 06, 10:03 am)