名词根据其可数性可分为可数名词和不可数名词。这两类名词的主要特点如下：

1. 可数名词的用法特点：可以有复数形式；可直接在其前使用不定冠词或数词；可受 these, those, few, a few, many, a good [great] many, a great [good] number of 等修饰。如：

There are five rooms in the apartment. 公寓里有五间房。

There were many things to be done. 有很多事情要做。

A large number of students are Asians. 很多学生是亚洲人。

2. 不可数名词的用法特点：通常没有复数形式；其前不可直接用不定冠词或数词；可用(a) little, much, a great deal, a lot of, plenty of, a large amount of, a large quantity of, some, any 等修饰；要表示数量不可在前面直接加数词，而要用 a piece of 之类的结构。如：

Knowledge is power. 知识就是力量。

They haven’t much furniture. 他们没有多少家具。

He lost a great quantity of blood. 他大量失血。

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