冠词和数词――数词
表示数目多少或顺序多少的词叫数词,数词分为基数词和序数词。表示数目多少的数词叫基数词;表示顺序的数词叫序数词。
一、基数词
1)基数词写法和读法: 345 three hundred and forty-five;
2)基数词一般是单数形式,但下列情况,常用复数:
a. 与of 短语连用,表示概数,不能与具体数目连 用,如scores of people 指许多人;
b. 在一些表示一排或一组的词组里;
如:They arrived in twos and threes. 他们三三两两的到达了。
c. 表示几十岁;
d. 表示年代,用 in +the +数词复数;
e. 在乘法运算的一种表示法里,如:3 x 5 = 15 Three fives is (are) fifteen.
二、序数词
序数词的缩写形式: first――1st second――2nd thirty-first――31st
三、 数词的用法
1)倍数表示法
a. 主语+谓语+倍数(或分数)+ as + adj. + as
I have three times as many as you. 我有你三倍那么多。
b. 主语+谓语+倍数(分数)+ the size (amount,length) of
The earth is 49 times the size of the moon. 地球是月球的49倍。
c. 主语+谓语+倍数(分数)+ 形容词(副词)比较级+ than
The grain output is 8 percent higher this year than that of last year.
今年比去年粮食产量增加8%.
d. 还可以用by+倍数,表示增加多少倍
The production of grain has been increased by four times this year.
今年粮食产量增加了4倍。
2)分数表示法
构成:基数词代表分子,序数词代表分母。分子大于1时,分子的序数词用单数,分母序数词用复数:
1/3 one-third ; 3/37 three and three-sevenths.
代词――人称代词的用法
1)人称代词的主格在句子中作主语或主语补语,例如:
John waited a while but eventually he went home.
约翰等了一会儿,最后他回家了。
John hoped the passenger would be Mary and indeed it was she.
约翰希望那位乘客是玛丽,还真是她。
说明:在复合句中,如果主句和从句主语相同,代词主语要用在从句中,名词主语用在主句中,例如:
When he arrived, John went straight to the bank.
约翰一到就直接去银行了。
2)人称代词的宾格在句子中作宾语或介词宾语,但在口语中也能作主语补语,第一人称在省略句中,还可以作主语,例如:
I saw her with them, at least, I thought it was her.
我看到她和他们在一起,至少我认为是她。(her做宾 语,them做介词宾语,her做主语补语)
a. ―― Who broke the vase? ――谁打碎了花瓶?
b. ―― Me. ――我。(me做主语补语= Its me.)
说明:在上面两例句中,her和me分别作主语补语。现代英语中多用宾格,在正式文体中这里应为she和I.
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