根据柯林斯英语语法系列《限定词及数量词》：非肯定语境主要指否定句、疑问句、条件句、以及含有few、little、hardly、seldom、without、fail、prevent等含有否定概念的句子。如：

The teacher didn’t accept his reasons for being late. 老师不相信他迟到的理由。

Did you feel satisfied with the arrangements? 你对这些安排感到满意吗? 

You can always resign if you’re unhappy. 如果不高兴的话，你任何时候都可以辞职。

Few of us favoured the policy. 我们没有几个人赞同这项政策。

Little does he care whether we live or die. 他一点也不管我们的死活。

She could hardly raise herself out of the chair. 她几乎没有力气从椅子上站起来。

This word is seldom used in British English. 这个词在英式英语中很少使用。

Without your assistance we wouldn’t have succeeded. 要不是有你帮忙，我们是不会成功的。

He failed in his bid to reach the summit. 他攀登顶峰未能成功。

What prevented you from coming? 何事阻止你前来？