used to say that sb/sth stopped sb/sth from happening :
If it weren't for you, I wouldn't be alive today.
used to say that sb/sth stopped sb/sth from happening :
If it weren't for you, I wouldn't be alive today.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005