I was wondering what it the proper use of I and me?
For example, which is proper grammar:
Mark and I bought it for her
Mark and me bought it for her
Another one is
It's from Mark and I
It's from Mark and me
Thank you in advance for your time!
Prescreptive grammarians would state than one form is wrong; however, a descriptive approach will consider both as correct.
Semantically speaking you can use either.
I agree that you will hear all of the possibilities in informal English. However, I would strongly advise following rules for "correct" grammar (which I indicated in my first post) if you are asked these sorts of questions on a test or are speaking/writing in a more formal situation.
I'd also like to mention that even descriptive grammarians usually manage to get the subject and object pronouns right -- despite their fondness for descriptive grammar.
Don't you think that grammar change over time. No one today speaks shakespeare's English, yet no one including the queen of England can claim people are speaking the incorrect English.
Personally, I think that there should be no "Correct grammar". Grammar should be defined as the subconscious knowledge speakers have in their mind.
I might be wrong, but that's how I perceive it.