My darn computer froze on me before I hit submit…let’s try this again.

1. If it’s the subject of the sentence, you say I. If it’s the object of the sentence, you say me.

ex.: My friend and I went to the park. “You” are doing it, so “you” should be “I” in this sentence.

Tom showed my friend and me how to use myspace. “Tom” is doing it, so “you”should be “me” in this sentence.

If YOU are performing the action, you’re “I”.

If SOMEONE ELSE is performing the action, you’re “me”.

2. It should be If I were that person.. This is the subjunctive tense, and the only time (I think!) that you will come across this sentence structure. It’s a conditional starting with If.

3. In this sentence, the word being modified by this clause is “one,” not “she.” She is obviously single, but “one” can be plural as it implies one of a group. You would choose the word “people” in this case.

When the sentence says My friend and I : it has to make sense if you only had one person in the sent. For example: My friend and I went to the store. My friend went to the store makes sense. & I went to the store makes sense so u know u have used it correctly. Example 2″ My mother and I …the same as above. My friend and me (above in your question) is not right. Not sure about y you cant say “was” -just know u cant! It would be “she is one of the coolest persons” bc u are talking about one person. You would use “people” if you had said “they are some of the coolest people” See the difference?

“My friend and I” is subjective.

My friend and I (or “We”) are 23.

however…

“my friend and me” is objective.

My dad yelled at my friend and me (or “us”).

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“people” is the more correct usage of the plural for person; however, “persons” is gaining in popularity.

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If I were you is accepted as correct because it has become the common way of saying it. Sometimes English is just that way. Kind of like when people say, “When the audience (which is a singular noun) gets back from intermission, they (plural pronoun) will return to their seats.” Saying it this say is acceptable although it is technically wrong.