12. A computer-implemented method of converting text to speech, the method comprising: analyzing, on one or more computing devices, original text to derive an intent representative of intended meaning of the original text that can be conveyed by non-lexical cues; determining, on the one or more computing devices, an insertion point of a non-lexical cue, in the original text, based on the derived intent; inserting by the one or more computing devices a non-lexical cue at the insertion point within the original text to generate augmented text; and synthesizing speech from the augmented text.
13. The method of claim 12 , wherein deriving the intent comprises using a probabilistic model to determine a syntactic probability with respect to a sequence of words in the original text, wherein the intent includes the syntactic probability, and wherein the insertion point of the non-lexical cue is determined using the syntactic probability.