Your friend asks you to do something, Refuse politely and say that you already did it in past. Use the following words if necessary:

week, yesterday, a month ago, 2 hours ago

Model: - Discuss this case now.
- But we discussed it last week.

1. Pay the fine immediately.
2. Invite your friend to the party.
3. You should consult a lawyer.
4. Please submit your documents to the notary.
5. Ask your brother to fill in the form