数 词

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/1990s.

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. )