Past
1. He opened the window in the classroom before the lessons.
2. My friend wrote many letters.
Future
1. He will open the window in the classroom before the lessons.
2. My friend will write many letters
Past
1. He opened the window in the classroom before the lessons.
2. My friend wrote many letters.
Future
1. He will open the window in the classroom before the lessons.
2. My friend will write many letters