Should you gramatically say John and me or John and I?

Answer 1

Anyplace you would say "I" say "John and I."

For example, you would say "I went to the store." So say "John and I went to the store.

Anyplace you would say "me" say "John and me."

For example, you would say "Mother sent me to the store." So say "Mother sent John and me to the store."

Many people think it is wrong to ever use "John and me." These people misunderstood what their elementary school teachers were trying to tell them. Little children are inclined to say sentences like "Me and John went to the park." Their teachers correct them by saying "John and I." (Mentioning yourself last is a rule of manners, not grammar.) From this they draw the conclusion that it is always supposed to be "John and I" and avoid saying "John and me" even when it is the right thing to say.

Answer 2

The correct usage depends on the role of the phrase in the sentence. Use "John and I" as the subject (e.g., "John and I went to the store"), and "John and me" as the object (e.g., "He gave the book to John and me").