to make sb/sth become sth :
Ten years of prison had turned him into an old man.
The prince was turned into a frog by the witch.
to make sb/sth become sth :
Ten years of prison had turned him into an old man.
The prince was turned into a frog by the witch.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005