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　　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/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. ）