By the time she had arrive/arrived, he had left/left

1 had done - went

2 arrived - had left

3 had been working - decided

7 arrived - had run

1 had done - went

2 arrived - had left

3 had been working - decided

4 had walked - came

5 found - had been searching

6 waited - had decided

7 arrived - had run

Tổng hợp các thì trong tiếng anh: https://vndoc.com/tong-hop-cac-thi-trong-tieng-anh-cong-thuc-cach-su-dung-dau-hieu-nhan-biet-95881