This is a very common grammatical error, both in written and spoken English. There is actually a very simple way to remember when to use “and I” and when to use “and me”.
Part of the problem is that some people have been reminded so often to say “and I” that they think it is always correct. Perhaps some well meaning parents or teachers thought that it sounded more polite.
Which is correct:
A. Mary and I went to the store.
B. Me and Mary went to the store.
In this case A is correct. “Mary and I” is the subject of the sentence. The pronoun “I” is the subjective form.
How about this one:
A. Dad gave my sister and me each a dollar.
B. Dad gave my sister and I each a dollar.
A wins again! “my sister and me” are the object in this sentence. Dad gave the dollar to us, think of object as the recipient. The pronoun “me” is the objective form .
Here is a quick trick that doesn’t involve remembering the words subjective and objective. In the sentence:
• Mary and I went to the store.
► Try saying it without the other person’s name:
a) I went to the store.
b) Me went to the store.
►See, you know enough about subjects and objects to know that a) is correct.
How about the second example. Take out “my sister” and say the sentence with “I” or “me”:
a) Dad gave me a dollar.
b) Dad gave I a dollar.
I’m sure that you can tell that a) is correct.
If you try this simple trick, you will find that this is easy.