1. When I left my school, I... (realise) that I... (forget) my English textbook. 2. She was happy because she ... (take) the 1st place in the competition. 3. He ... (buy) the car by the time I got there. 4.1... (not listen) to the joke because I ... (hear) it before. 5. When he ... (arrive) at the station, his train already ... (leave).
When I left my school, I realized that I had forgotten my English textbook.She was happy because she had taken the 1st place in the competition.He had bought the car by the time I got there.I did not listen to the joke because I had heard it before.When he arrived at the station, his train had already left.