英语中基数词与序数词的区别和用法.docx

英语中基数词与序数词的区别和用法
篇一：英语基数词和序数词专题
数词
一、基数词和序数词〔cardinal and ordinal numbers〕: 基数词表示数目，序数词表示依次。e(名词或动词) She was then forty years of age. /she was then
aged forty(years).
“at the age of +基数词”表示“在…岁时”，通常作状语。. Julie can swim at the age of eight.
3.“基数词-year-old”的复合形容词，意为“…岁的”，一般作定语修饰名词。.
Sandy is a six-year-old child.
4. in one’s +整十基数词的复数形式：这一构造表示“在某人几十多岁时“。.
My grandfathr died in his nineties.
teens 表示 “十多岁”〔13-19岁〕。.
The boy was in his teens. 这男孩只有十多岁。
He is not yet out of his teens. 他还不满20岁。
六、数学运算表达〔Arithmetic Expressuib 〕
Add 3 and 9. 3 plus 9 equals/is 13
Subtract 3 from 9. 9 minus 3 equals/is 6.










Multiply 3 by 9. 3 multiplied by 9 equals/is 9
Divide 9 by 3 9 divided by 3 equals/is 3.
＋plus(介词)/ －minus (介词) / × multiplied(形容词性质的过去分词) / ÷ divided (形容词性质的过去分词)
＋add(动词)/ －subtract(动词) / × multiply(动词) / ÷ divide(动词)
【易错点提示】
1. 分数和百分数做主语时，谓语的单复数取决其后面of构造中的名
词。留意区分下面两句话：
2. 基数词可以用在有连字符的合成形容词中，留意其中的名词前无冠词。.
a two-day holiday=two days’ holiday
a ten-minute walk=ten minutes’ walk
有连词符的复合形容词在剧中只能充当定语，不能作表语。
3. 在20世纪30年头：in the 1930s
在30年头：in the 30s
在某人30几岁时：in one’s thirties
4. 留意下面的不同表达方式：
Lesson Twelve = the Twelfth Lesson
Gate Five= The Fifth Gate
Class one/Grade〔Two〕two=the ninth grade/ page nine/ Room 401/Channel Eight










5. 序数词在表示地名时的用法： Fifth Avenue 〔序数词前无冠词〕
6. 序数词用在奖项前面的用法：win first prize (序数词前无冠词)
7. 序数词表示在原来数字的根底上的 “再、又”的用法：
I have had two cakes. I want to have a third one.
8. 一次：once两次：twice 三次: three times
9. 倍数的表达：
〔1〕“倍数+形容词/副词的比拟级+than”表示“比??大几倍” rope is three times longer than that one.
〔2〕“倍数+as+形容词/