1. Elevators are operated by electricity. (엘리베이터는 전기로 움직인다) 2. He had his nose operated on. (그는 코 수술을 받았다) 3. Who is operating the microphone? (누가 마이크를 조작하고 있느냐) 4. The surgeon operated on him. (외과 의사는 그에게 수술을 했다) 5. Several causes operated to begin the war. (여러 가지 원인으로 전쟁이 일어났다)
