He took me to hospital and the doctors operated me.
He took me to hospital and the doctors operated me.
Explanation
Note:- While covering active into passive both parts should be made into passive.
Active Voice (Part 1): He took me to hospital.
Correct Passive Voice: I was taken to hospital by him.
Active Voice (Part 2): And the doctors operated me.
Correct Passive Voice: And operated by the doctors.
Present Indefinite Tense
Active Voice: Subject + Verb + Object
Passive Voice: Object + is/am/are+ third form of a verb + by + subject.