英语问题，将下列句子改为间接引语

英语问题，将下列句子改为间接引语
1.“Was Mr.Gilbert's operation was successful?"asked he.
2."when will Mr.Gilbert be allowed to go home ?"asked the caller.
3."He will have to stay in hospital another two weeks",said the doctor.
4."Are you a relative of the patient?" asked the doctor