to have never happened before ☊ 
chưa hề vẩy ra trước đây ☊ to never have (done sth) ☊ chưa từng ☊ there’s never been ~ ☊ cổ kim chưa hề có ☊ misfortunes never occur singly ☊ họa vô đơn chí ☊ it doesn’t matter, no trouble, don’t mention it, never mind ☊ không sao ☊ continual, unceasing, never -ending ☊ miên man ☊ only now, never before ☊ mãi đến bây giờ ☊ to always remember, never forget ☊ nhớ mãi ☊ to never stop talking, talk continuously, talk non-stop ☊ nói luôn miệng ☊