If clauses type 2

Fill in the correct form of the verb - main clause.

1. If I was/were you, I this offer. (accept)
2. It nice if you came to the party on Saturday. (be)
3. If the sun shone, everybody happy. (be)
4. If the shoes were too big, I them back. (take)
5. The teacher us a map if we didn´t have one. (give)