把“智慧山英语”订阅号置顶,再也不怕错过智慧山的好文章,错过智慧山的好活动啦! 1.基数词的写法和读法: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:3×5=15,three fives is fifteen. 序数词的缩写形式: first:1st, second:2nd, thirty-first:31st 1.倍数表示法 a.主语+谓语+倍数: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+the size 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+形容词比较级+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%。 The production of grain has been increased by four times this year.今年粮食产量增加了4倍。 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
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