1. When [was chased , chased] by a large, hungry fish, the squid sends out a cloud of dark fluid.
2. Most of the shops and services [ are found , found ] in malls are parts of large corporation.
여기서 답이 왜 1번은 chased 2번은 found인가요??ㅜㅠ
수동태인데 왜be동사가안들어갈까요?