as he had never lived on a farm, he does not understand animals.

이걸 분사구문으로 고치라는데 시제가 다르잖아요..ㅠㅠㅠ 시제가 다를땐 어떻게 고쳐야하나요?
having p.p.를 쓴다고는 하는데...

-having had never lived on a farm, he does not understand animals.
가 맞나요?

이건 부사절로 고치라고 했는데,
having done it before, he knew how to do it.
-
요건 어떻게 바꾸나요ㅠㅠㅠㅠ