Interesting Grammar

As Ashlyn's language development continues, I've noticed that she comes up with some interesting verb conjugations.  (Leave it to me, the English major, to notice things like this...)  She handles regular verbs just fine, easily using the correct verb tense in pretty much every situation, but the irregular verbs still throw her off a bit most of the time.  My favorite word that she uses all the time lately is "sawn" which seems to be a form of the verb "to see."  I think it is a combination between the past tense, "saw," and the past perfect tense, "have seen."  She uses it in sentences all the time, sometimes as "sawn" and sometimes "have sawn."  For example, "Mommy, I sawn your book before -- it was on the couch."  Or, "I have sawn this episode of Word World before."  Obviously, I can't resist correcting her every time with the hope that eventually she'll understand that "sawn" isn't really a word...for now, when I correct her, she usually just gives me a completely confused look and continues talking about whatever it was that she was saying before I interrupted her to try give her a lesson in grammar that she's not interested in.