Hi Zuzka, It should be: "My friends and I decided to do..." When we use a group subject, we introduce the personal pronoun "I" in the subject form after mentioning others (i.e My friends). Just as a side comment, "I" is a personal pronoun in the subject form (subjects are nouns performing an action. In your case, the action is "decided".) If we are expressing a group object instead, we introduce the personal pronoun "me" in the object form (objects are nouns receiving an action) after mentioning others (i.e my friends). Example: He decided for my friends and me. I hope this helps.

You can definitely say that and you will hear that often said in conversations. However, we learn in school that it is more grammatically correct to say "I", as in "My friends and I decided to go to the movies." Both sentence structures work fine in conversation, but one is more grammatically correct than the other :)

The _grammatically_ correct way to say this would be “I and my friends” – it is the subject of the sentence here, so there is no reason to put “I” into the objective case. As others mentioned in their answers “My friends and I” would be more common, but both are equally grammatically correct. Technically, strictly speaking, formally, “Me and my friends” is incorrect, BUT native speakers will say this all the time, so if you are not taking a grammar test, but rather just speaking in the real world, you’ll be fine. Here is why this happens. For all kinds of weird reasons, the objective case of personal pronouns became the default one in sentences without a verb. For example: — Who wants to go to the cinema? — Me! There is no reason to use “I” in the objective case here, it would be correct to say “I!”, but virtually no one does this. Now, in your example there is a verb, so: — Me decided to go to the cinema. (WRONG) is entirely incorrect. — I decided to go to the cinema. is the only possible way of saying this. But! As you add your friends, the subject of the sentence becomes “conjoined” and, intuitively, the pronoun moves further from the verb and kinda-sorta “loses sight” of it and therefore tends to switch to the objective: — Me and my friends decided to go to the cinema. (Not 100% correct grammatically, but native speakers will say this.)

i think my freind and i ...