(located) at; (to be) in; to exist; in the middle of doing sth; (indicating an action in progress)[cedict]
以前
yǐ qiánㄧˇ ㄑㄧㄢˊ
before; formerly; previous; ago[cedict]
有用
yǒu yòngㄧㄡˇ ㄩㄥˋ
useful[cedict]
过
guòㄍㄨㄛˋ
(experienced action marker); to cross; to go over; to pass (time); to celebrate (a holiday); to live; to get along; excessively; too-; surname Guo[cedict]
现在
xiàn zàiㄒㄧㄢˋ ㄗㄞˋ
now; at present; modern; current; nowadays[cedict]
被
bèiㄅㄟˋ
by (indicates passive-voice sentences or clauses); to cover; to wear[cedict]