population 的用法

population 的用法
1.population 常以单数形式出现，意为“人口”“人数”。

如果指世界不同地区的人口时，用复数。

（1）The population of this city is growing every year.
(2) Many parts of the world, which once had large populations and produced plenty of crops, have become deserts.
2.做主语时，谓语动词的数的选用，population直接做主语，谓语动词一般用单数，前面有some, most 或者百分数时，谓语动词常用复数，前面有分数时，谓语动词单复数即可。

(1).The population is increasing faster and faster.
(2).At the beginning of the twentieth century, the world\'s population was about 1,700 million.
(3).About seventy percent of the population in China are farmers.
(4).Most of the population of the city are workers.
(5).One third of the population now smoke/smokes.
3.population 前的冠词的选用，population of 跟地名或者事物时，用定冠词the, population of 跟数词时，用不定冠词a, population 表示抽象意义时，用零冠词。

（1）.China has a population of about 1.3 billion.
(2). New York is a big city with a population of over 10 million.
(3). The population of Canada is about 29 million.
(4). The people’s living standard has risen, causing a rise in population.
4.询问某国、某地有多少人口时,不用\"How much...?\",而用\"How large...?\";在问具体人口时用\"What...?\"。

表示人口的\"多\"或\"少\",不用\"much\"或\"little\",而要用\"large\"或\"small\"
(1).How large is the population of your hometown? 你们家乡有多少人口?
(2).The population of our hometown is nearly twice as large as that of yours. 我们家乡的人口是你们家乡人口的将近两倍。

(3).What is the population of Canada? 加拿大的人口有多少?
5. 在表示多个地区的人口时,population要用复数形式populations。

例如:
Many parts of the world, which once had large populations and produced plenty of crops, have become deserts. 世界上很多地区一度人口众多,种植大量的农作物;现在,这些地区已经变成了沙漠。