①material表示材料時(shí)不可數(shù)
表示素材是可數(shù)例如寫(xiě)作素材
② population是一個(gè)集合名詞,它的用法有時(shí)較為特殊,所以很容易用錯(cuò).下面談一下它的用法.
一、當(dāng)主語(yǔ)是表示\"人口的百分之幾、幾分之幾\"時(shí),謂語(yǔ)動(dòng)詞用復(fù)數(shù)形式.例如:
About seventy percent of the population in China are farmers. 中國(guó)大約有百分之七十的人口是農(nóng)民.
二、population常與定冠詞the連用,作主語(yǔ)用時(shí),謂語(yǔ)動(dòng)詞常用第三人稱(chēng)單數(shù)形式.例如:
The world\'s population is increasing faster and faster. 全世界的人口增長(zhǎng)得越來(lái)越快.
At the beginning of the twentieth century, the world\'s population was about 1,700 million. 在二十世紀(jì)初,全世界的人口大約是十七億.
三、有時(shí)population可用作可數(shù)名詞,其前可用不定冠詞.例如:
China has a population of about 1.3 billion. (=There is a population of about 1.3 billion in China.) 中國(guó)大約有十三億人口.
New York is a big city with a population of over 10 million. 紐約是一個(gè)有一千多萬(wàn)人口的大城市.
在表示多個(gè)地區(qū)的人口時(shí),population要用復(fù)數(shù)形式populations.例如:
Many parts of the world, which once had large populations and produced plenty of crops, have become deserts. 世界上很多地區(qū)一度人口眾多,種植大量的農(nóng)作物;現(xiàn)在,這些地區(qū)已經(jīng)變成了沙漠.
四、表示人口的\"多\"或\"少\",不用\"much\"或\"little\",而要用\"large\"或\"small\".例如:
India has a large population. 印度人口眾多.
Singapore has a small population. 新加坡人口少.
五、詢(xún)問(wèn)某國(guó)、某地有多少人口時(shí),不用\"How much...?\",而用\"How large...?\";在問(wèn)具體人口時(shí)用\"What...?\".例如:
-How large is the population of your hometown? 你們家鄉(xiāng)有多少人口?
-The population of our hometown is nearly twice as large as that of yours. 我們家鄉(xiāng)的人口是你們家鄉(xiāng)人口的將近兩倍.
-What is the population of Canada? 加拿大的人口有多少?
-The population of Canada is about 29 million. 加拿大的人口大約有二千九百萬(wàn).
六、population還表示\"某地、某類(lèi)的動(dòng)、植物或物品的總數(shù)\".例如:
In India, however, the population of tigers has increased, from 2,000 in 1972 to about 5,000 in 1989. 然而在印度,老虎的總數(shù)已從1972年的2,000只增長(zhǎng)到了1989年的大約5,000只.