YOU SAID:
when did the doctor figure out the wife did it
INTO JAPANESE
医者は妻がやったといつわかったのですか
BACK INTO ENGLISH
When did the doctor find out that his wife did it
INTO JAPANESE
医者は彼の妻がそれをしたことをいつ知りましたか
BACK INTO ENGLISH
When did the doctor find out that his wife did it
You've done this before, haven't you.