用作定语
▲～+n.
The store will be closed for an indefinite period.这家商店将无限期关闭。
The exam will take place on an indefinite date.考试日期未定。
He has rather indefinite views on the question.他对这个问题的观点相当不明确。
用作表语
▲S+be+～
The date of the ship's arrival is indefinite.船到的日期不确定。
The question still remains indefinite.这个问题仍未解决。
▲S+be+～+prep.-phrase
He is indefinite of himself.他对自己没有信心。
