1、英语分数的表示法 分数在英语中通常是借助于基数词和序数词来共同表达的。其中基数词表示分子，序数词表示分母。 如： 1．The centimeter is one-tenth of the decimeter or one-hundredth of the meter．厘米是分米的十分之一，或者说是米的百分之一。 2．However，the number of boys will be a third or less than the girls in the class．但是，班里男生的人数将比女生少三分之一或
2、更少。 注：从以上例子可以看出，分子除用one外，也可用a；如果分子大于1，分母要用复数形式。但是，1／2不能说a（one）second，而要说a（one）half。例如： 3．The sum of one half，one third and one fourth of a certain number is 13. 某数的1／2，1／3和1／4的和是13。 1／4和3／4可以说a（one）fourth和three fourths，但常用a quarter和three quarters表示。应该注
3、意的是，分数修饰名词时，若该名词是不可数名词只能用单数；若是可数名词，用单数或复数均可。但是，若它们在句子中作主语，则谓语动词是用单数还是复数取决于名词，即与分数所修饰的名词保持一致。例如： 4．Only one-fifth of air consists of oxygen．氧气只占空气的1／5。 5．About two thirds of the students attend the meeting．大约2／3的学生都参加了会议。 带分数也是常见的英语数词表达。所谓带分数，实际上是“整数＋分数”，表达时分
4、而述之，只是整数部分与分数部分要用连词 and连接。当带分数修饰名词时，该名词通常是复数，但若名词置于整数one或a之后，则用单数。“带分数＋名词”作主语时，谓语动词根据临近原则要用复数。例如：6．You should finish the work within one and a fourth hours．你应在1．25小时内完成工作。 7．The atom breaks up in a minute and a quarter．原子在1．25分钟内裂变。 课后巩固练习：1. About ________
5、 students in our class can describe that place in English. A. three-fifths B. three-fifth C. third-five D. third-fifths 2. ---Which is the smallest number of the four? ---_______________. A.Two-thirds B. A half C. A quarter D. Three-fourths 3.
6、______ of the land is covered with trees and grass in Pingjiang, Yueyang. A. Three fives B. Three fifths C. Three fifth 4. About_______of the students in our class were born in the_____. A. two-thirds, 1990s B. two-thirds, 1990 C. two
7、-third, 1990s5. The teacher said that_____ of the boys would take part in the talent show. A. three five B. three fives C. thirds fifths D. three fifths
