Antes de

[Roxerz]

How would one show a change in subject after a preposition?

I was thinking for example:

Go to the house before I arrive.
Ve a la casa antes de llegar.

I was thinking of just adding "me" after llegar but I'm not really sure in this situation.

[Rusty]

antes de que (yo) llegue (subjunctive mood triggered by 'antes de que')