2009年成人高考专升本英语辅导资料六
来源：网络发布时间：2009-07-14
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帮助希望进入名校的在职人员实现他们的本、专科大学梦想
第四节 数 词(3-3~4-1) 大纲要求
基数词及其用法;序数词的构成及其用法;分数词的构成;小数的用法。
一、基数词及其主要用法
表示数目的词称基数词。15 fifteen，几百几千不加s，242 two hundred and forty-two，5058 five thousand and fifty-eight，9，600，000 nine million six hundred thousand
1.基数词可以用于数字的计算。
6+8=14 Six plus eight is fourteen.
9-7=2 Nine minus seven is two.
7X5= 35 Seven times five is thirty-five.
8÷4=2 Eight divided by four is two.
2.基数词可以表示人的大致年龄和年代。
He died in his fifties.
This took place in 1990s/1990's.
The professor became successful in his thirties.
3.基数词可以用来表达年份、时间、电话号码。
1700 seventeen hundred
1814 eighteen fourteen
9：20 nine twenty
11：30 eleven thirty/ half past eleven
5：45 five forty-five/ a quarter to six
88760231 eight eight seven， six zero two， three one
4.基数词可以用于编号。
Number six， line 4， page 19， Bus(No.) 332， Platform (No.) 5， Room 101
5.基数词可以和其他词一起构成合成形容词，在句子中作定语。
A one-month-old baby can recognize its mother by smell.
This eleven-month-old baby can speak a few words.
(The baby is eleven months old.)
The teacher asked us to write a four-thousand-word essay as our homework.
(There are four thousand words in the essay.)
This four-paragraph essay is too difficult for me to understand.
(There are four paragraphs in this essay. )
二、序数词及其主要用法
表示顺序的词称为序数词。如first， second， third， fourth， ninth， twenty-first， forty-fifth等。
序数词可以用来表示日期和世纪。May the first / the first of May(5.1)， August the eighth / the eighth of August(8.8)， the twentieth century， the twenty-first century
序数词在句子中前面一般加the
The first of October is our National Day.
She was the third to arrive.
序数词在句子中前面加不定冠词，表示“再一”又一“。
They'll have to do it a second time.
Shall I ask him a third time?
When he sat down ， a fourth man rose to ask.
三、分数词的构成
分数的分子用基数词表示，分母用序数词表示，若分子大于1，分母需用复数。
two-thirds(2/3)，one-third(1/3)， nine-tenths (9/10)， five-twelfths(5/12)。
特殊表达法有：one half (1/2)，a quarter (1/4)， three quarters (3/4) .
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