used when you say sth that is surprising, or sth connected with what sb else has just said :
I agree with you, as it happens.
As it happens, I have a spare set of keys in my office.
used when you say sth that is surprising, or sth connected with what sb else has just said :
I agree with you, as it happens.
As it happens, I have a spare set of keys in my office.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005