Why YSK: it'll make your writing much clearer to readers!
If you're writing about an item that you share possession of with someone else, you still use "my" like you would if it was only yours. For example, "my and my partner's apartment," not "my partner and I's apartment."
When deciding between "and I" and "and me," imagine the sentence without the other person/people. This will make it clear which to use.
**Example:** Robert **and I** went to the store.
**Explanation:** you wouldn't say "me went to the store" if you take away Robert.
**Example:** Rosalie took her daughters **and me** to lunch.
**Explanation:** without the daughters, you wouldn't say "Rosalie took I to lunch." #education source