I am often asked which pronoun is correct a sentence like this:
1. I appreciate you helping me.
2. I appreciate your helping me.
No one’s brain is going to explode if you choose the wrong pronoun, but “your,” a possessive pronoun, is definitely preferred.
How about this one?
1. Daniel looks forward to your arrival.
2. Daniel looks forward to you arrival.
That was easy, wasn’t it? You’d never write “you arrival” because “arrival” is a noun, and you know you need an adjective to modify it. When you use a pronoun that acts as an adjective to modify a noun, you’ll always need a possessive pronoun, in this case “your.”
That’s all for today, folks.