Past Perfect
1st: John (forget) his homework. 2nd: He (got) to school.
John had forgotten his homework before he got to school.
1st: The President (go) to Chile 2nd: He (go) to Mexico.
The President had gone to Chile before he went to Mexico.
1st: Shelly (spill) her Coke in the hallway. 2nd: The teacher (fall) .
Shelly had spilt her coke in the hallway before the teacher fell.
Fix the mistake: The table got dirty before I had eaten on it.
The table had gotten dirty before I ate on it.