In standard English, it's grammatically correct to say "between you and me" and incorrect to say "between you and I." The reason for this is that a preposition such as between should be followed by an objective pronoun (such as me, him, her, and us) rather than a subjective pronoun (such as I, he, she, and we).
Is just you and me grammatically correct?
“It's just you and I” is grammatically correct. Informally, many people would say, “It's just you and me,” but it is technically incorrect.
Which is correct Sally and me or Sally and I?
If you are using the subject form, “Sally and I” is correct. If you are using the object form, “Sally and me” is correct. For example, “Sally and I went to the cinema”, and “He gave presents to Sally and me” would be correct.
Do you say me and John or John and I?
When it's the subject, "John and I" is correct. When it's the object, "John and me" is correct. John and I are going shopping.
Is it grammatically correct to say me and someone?
I and someone is grammatical; me and someone is not strictly grammatical, but is very common; I and someone we is not grammatical, and sounds wrong to native English speakers.