What is Aren't I?
1.
Just as David said, "aren't I" means "am I not". However, it is /not/ the proper way to say anything.
Don't say ''aren't I'', it's incorrect. I'm in my car, am I not?
2.
A contraction which is technically incorrect but is accepted, and therefore acceptable, within conversational English.
'Aren't I' may be formally wrong, but I only use fully formal English when writing an essay for class.
See
3.
The proper way to say ''ain't I''. ''Aren't I'' means ''am I not''.
Don't say ''ain't I''. ''Aren't I'' is correct. I'm in my car, aren't I.
See
