hello, please can you help for this exercice.

Réponse :
Hello
1. I remember that i saw her somewhere before.
2. We were late because we forgot the tickets.
3. We did not met before i saw her at the party.
4. After we got breakfast, we went for a walk.
5. She bought a guitar a week before she starts lessons
6. When we got to the station we were late and the train left
Explications :