Образец:
He looked through the papers. He dictated some letters. (After)
After he had looked through the papers, he dictated some letters.
Сделать по образцу:
1. We arrived. The concert started. (When)
2. He came to the station. The train left. (After)
Hey there! :)
Answer:
1 When we arrived, the concert had started.
2 The train had left, after he came to the station.
Hope this helps! :)