Q:

When he left school, the textbooks were put aside by him and were never reopened.

• 1
  He put aside his textbooks when he left school and were never reopened by him.
• 2
  He put aside his textbooks as he left school and never reopened.
• 3
  After he left school, he put aside his textbooks and they were never reopened.
• 4
  He put aside his textbooks when he left school and never reopened them.