Ipronoun
American /aɪ/ British /aɪ/
used by a speaker or writer to refer to themselves
I is the subject form and is always written with a capital letter, wherever it stands in a sentence. The object form is me; the possessive determiner is my, and the independent possessive is mine.
Word family
Usage
Unlike ordinary words, I keeps its capital letter wherever it stands in a sentence, not just at the start. When I is joined with another person, it comes last and stays in the subject form: my friend and I, not me and my friend.