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· ☆2023广东中考英语专题复习——数词(numeral)
数词用法知多少
一、除了从1-12个基本数词(基数词)用不同的词表达外,从13-19后都有-teen后缀。如:
one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen,sixteen, seventeen, eighteen, nineteen
二、从20至90之间表整十的数词都跟后缀-ty。如:
twenty, thirty, forty, fifty, sixty, eighty, ninety
表示“几使几”用整十加个位数构成,中间用连字符“-”。如:
twenty-one, thirty-two, forty-three, fifty-four, ninety-six
三、表具体数字时,hundred,thousand,million用单数。如:
four hundred, five thousand, seven million, nine billion
★注意:几百几十之间一般用and连接。如:
three hundred and forty- nine, six hundred and seven
四、表示不确定的“数百”,“数百万”,“数千”,“数十亿”时,用“hundreds”,“thousands”,“millions”,“billions”加“of”构成。如:
There are hundreds of teachers in our school.
Thousands of students are studying in our school.
The mountain is covered with billions of trees.
五、表示“…十”的数词的复数可以表示人的岁数或年代。
eg. He is in his early thirties.他有三十来岁(31—34岁):
This took place in the 1930s.这事发生在二十世纪三十年代;
六、表示顺序的词(序数词)除1-3外,其余的后面都有后缀-th。如:
first, second, third,fourth, fifth, ninth, eleventh, twelfth
整十的序数词后面是由基数词变y为i,再加eth构成。如:
twenty→ twentieth, eighty→eightieth, ninety→ninetieth
其余的整数加个位数构成的词,只变个位数为序数词即可。如:
twenty-nine→twenty-ninth,forty-five→forty-fifth,fifty-six→fifty-sixth,sixty-seven→sixty-seventh,ninety-seven→ ninety-seventh
序数词的缩写形式为:阿拉伯数字加上这个词的末尾两个字母。
1st 2nd,3rd,4th,20th,21st,22nd,23rd
七、序数词前一般加定冠词the,但有时加不定冠词表示“又一”,“再一”等。
如:I have tried twice. I want to try a third time.
He has failed three times. He will try a fourth time.
八、数词与名词连用时,如几号,几班,几年级,房间号及邮编号码时,首字母都大写。如: Number One, Class Three, Grade Two, Room 218, Zip Code 257091
九、表示倍数的大小时,两倍用twice表达,三倍以上用数词加times表达。
如: My school is twice as large as theirs.
Five times seven is 35.
十、分数的表达:分子基数词,分母序数词,分子大于1,分母加s。如:
1/4→ one fourth(a quarter),3/4→ three fourths(three quarters), 1/5→ one fifth, 4/5 →four fifths, 1/3→ one third( a third)
十一、小数的表达,小数点读作point,其余的按基数词读出。如:
0.2 →zero point two, 5.79 →five point seven nine
十二、百分数的表达,百分号读作percent。如:
10%→ ten percent, 16%→