It was more in sorrow than in anger that he criticized his former colleague.
Jane and Mary are good friends; the former is a teacher, the latter is a nurse.
He is too proud now to be seen with his former friends.
Of these two men, the former is dead but the latter is still alive.
The poor girl found it hard to throw off her former boy friend.
Of these alternatives, I prefer the former.
Mr. Heath is the former Prime Minister of Britain.
the first of two or the first mentioned of two
referring to the first of two things or persons mentioned (or the earlier one or ones of several)
belonging to some prior time
同义词：erstwhile, old, onetime, quondam, sometime
(used especially of persons) of the immediate past
belonging to the distant past