2009年成人高考专升本英语辅导资料六

　　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) .

　　考试重点