英语名词分为专有名词和普通名词，其中普通名词又分为可数名词或不可数名词；可数名词如篮子里的鸡蛋、公交车上的人等，不可数名词如空气、灰尘等，当表示名词的数量时，amount 和 number 就应运而生了。
Amount 和 number 都有“数量”的意思，都可以用来表示名词的数量，而且它们都是既可以作名词，且经常跟 enormous，small 或 large 等词连用，又可以作动词，但它们的实际用法不同。那我们如何记住它们是接不可数名词还是可数的呢？Please follow!
1. 作名词，用来表示不可数名词的数量，如玻璃杯中的水，宗教自由等，后面常接万人迷 of，例如：
We've had an enormous amount of help from people.
The amount of time it took to finish the job was very frustrating.
2017 has seen an increase in the amount of web traffic devoted to travel research.
2. 作动词，常用于短语动词 amount to sth 中，意为“总计，等于”等，例如：
Their annual fuel bills amounted to over 6,000.
I forgot to return the DVD on time, and the late charges amounted to almost $25.
Her answer amounted to a complete refusal.
1. 作名词，用来表示可数名词的数量，如街边的商店、树上的小鸟等，意为“数量，数额”，后面常接万人迷 of，例如：
A large number of people have applied for the job.
There has been an increasing number of cases of the disease.
Julia asked Mark to read him the number of garlic cloves called for in the recipe.
2. 作动词，意为“总计，共计，数以…计”等，相当于 add up to 或 count，例如：
After the hurricane the homeless numbered over 200,000.
The crowd numbered more than a thousand.
They told me that their village numbered 100.
两者都可以表示数量，amount 用于不可数名词，而 number 用于可数名词；不可数名词用英语表示可以是 a mass noun，它是以“ a m”开头的，而且 amount 也是 am 开头的，所以 amount 用于不可数名词。
