this; these; (commonly pronounced zhei4 before a classifier, esp. in Beijing)[cedict]
以前
yǐ qiánㄧˇ ㄑㄧㄢˊ
before; formerly; previous; ago[cedict]
從未
cóng wèiㄘㄨㄥˊ ㄨㄟˋ
never[cedict]
發生
fā shēngㄈㄚ ㄕㄥ
to happen; to occur; to take place; to break out[cedict]
過
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]