at no time in the past or future; on no occasion; not ever.
they had never been camping in their lives
同义词：
at no timenot at any timenot evernot onceon no occasionliterary：ne'er
2
not at all.
he never turned up
同义词：
not at allcertainly notnot for a momentnot under/in any circumstancesunder/in no circumstanceson no accountinformal：no waynot on your lifenot in a million yearsnot for love or moneynot on your nelly
