2. 含有半否定意义的词语

barely, hardly, few, little, rarely, scarcely, seldom, not all, not everyone, not everything,...具有半否定的意义。例句：

1) We could hardly see any fresh vegetables in winter on market several years ago.几年前在冬天市场上很难见到新鲜蔬菜。

2) These young people know little about how to choose good books to read.这些年轻人几乎不知道如何挑选优秀的书籍来读。

3. 不含否定意义的否定结构

有些词和词组形式上是否定结构，但其含义是肯定的，比如：cannot but, can't help,no sooner...than, not...until, in no time, none other than, nothing but,等等。例句：

1) We can't but face the reality.我们只有面对现实。

2) These old buildings will be replaced by modern apartment buildings in no time.这些旧建筑将很快为现代化的公寓所代替。