Is it possible to train iMessage dictation to avoid certain errors?

When I dictate, iMessage does not recognize plurals most of the time but creates a possessive instead, even when the grammar is unambiguous. I will say something like "it has useful features" and iMessage will display "it has useful feature's". Is there any way to train it not to make such errors? Is there a mode that can be turned on that will note any corrections I make to the rendered text?