It is => It's I am => I'm That is => That's Why do we say "This is " instead of "This's"?
I generally hear y'alls's used as the possessive form, but I have also heard yourn. Since y'all is a colloquial pronoun, its possessive form is basically liberated from prescriptive linguistics which ...
I'm a native English speaker (Texas counts, I suppose), and I pronounce "your" to rhyme with "core", and "you're" to rhyme with "cure". Is it just me or did I pick this up somewhere?
First, I'm aware of this question. What I want to know is if there are other similar constructs, done by contracting a verb with "us".