"I going back there" should be "I am going back there."
"Boy are liars" should be "Boys are liars." if that helps deafgal.
I am not sure why a couple of people are claiming that it is not a deaf thing. Is it me or isn't it blatantly obvious? Yes I know hearing people have grammar mistakes too but their mistakes are drastically different than those typical of the deaf. Writing mistakes isn't a deaf thing (just as writing mistakes isn't a hearing thing) but to me those kind of mistakes is definitely a deaf thing. Phonetically mispelling words is definitely a hearing thing.