We use quantifiers when we want to give someone information about the number of something: how much or how many.
我们用数量词告诉别人数量的多少。

Sometimes we use a quantifier in the place of a determiner:
有时候我们用限定词来描述：

Most children start school at the age of five.

We ate some bread and butter.

We saw lots of birds.

We use these quantifiers with both count and uncount nouns:
以下的限定词可描述可数和不可数名词：

and some more colloquial forms:
有些比较口语化：

Some quantifiers can be used only with count nouns:
有些只能用来描述可数名词：

and some more colloquial forms:

Some quantifiers can be used only with uncount nouns:
有些只能用来描述不可数名词：

And, particularly with abstract nouns such as time, money, trouble, etc, we often use:
有时候遇到比较抽象的词我们用数量词来形容：

Members of groups

You can put a noun after a quantifier when you are talking about members of a group in general…
当提到一般的群体成员时，用数量词修饰名词。

Few snakes are dangerous.

Both brothers work with their father.

I never have enough money.

…but if you are talking about a specific group of people or things, use of the … as well
但是如果提到一个特殊群体的人或事物，也用the来修饰名词。

Few of the snakes are dangerous.

All of the children live at home.

Note that, if we are talking about two people or things we use the quantifiers both, either and neither:注意，当我们提到两个人或者事物时，我们用both、either和neither修饰名词。

*Nouns with either and neither have a singular verb.
Either和neither修饰名词，动词用单数形式。