my friend and I和me and my friend的用法有何不同

你好，

这要取决于实际情况的需要。

如果是动作的发出者，作为主语，那就是 my friend and I。

My friend and I are going to shanghai next week.

但如果是动作的受者，是宾语的话，那就要用 me and my friend。

The company invited me and my friend to the party.