文档介绍：数词分基数词和序数词两类。
——10 one,two,three,four,five,six,seven,eight,nine,ten
. 11——19 一般在后面加teen eleven,twelve, thirteen, fourteen, fifteen, sixteen, seventeen,eighteen, een.
一、基数词
21——99 整数在后面加-ty 特殊:twenty,thirty, forty,fifty,eighty
21 twenty-one
101 a hundred and one thousand 千 million百万 billion十亿
)基数词表示确切的数时,不用复数形式.
2)表示不确切数,如成百、成千上万,则用复数。
There are hundreds of people in the hall.
320 three hundred and twenty
,用几十的复数形式。 He became a professor in his thirties. It was in the 1960s.
可作主语、宾语、定语、表语、同位语。 The two happily opened the box.(作主语)
They three tried to finish the task (作同位语)
二、序数词
一、表示顺序的词称为序数词。
特殊: first, second, third, fifth,eighth,ninth, twelfth
其他: 添加“th”。如 sixth、eenth.
变y为i,再加“eth”构成。 twenty——twentieth thirty——thirtieth
表示第几十几时,用
几十的基数词+连字符“-”+个位序数词。 thirty-first 第三十一 fifty-sixth 第五十六 seventy-third 第七十三 y-ninth 第九十九
:阿拉伯数字后加上th。 first—lst second—2nd third—3rd fourth—4th twentieth—20th twenty-third—23rd 序数词在句中可作主语、宾语、定语和表语。 The second is what I really need.(作主语) He choose the second.(作宾语) We are to carry out the first plan.(作定语) She is the second in our class.(作表语)
注:通常序数词前面要加定冠词 the;但出现不定冠词a或an时,则表示“再—”,“又—”。 We'll go over it a second time.
另外,基数词也可以表示顺序。 the first lesson——Lesson One the twenty-first room——Room 21(twenty-one)
三、时刻表示法 1. 几点钟 5:00 读作 five o’clock 2. 几点过几分 five past seven 七点过五分 half past six 六点半 a quarter past eight 八点过一刻 3. 几点差几分 ten to eight 差十分八点 a quarter to twelve 差一刻十二点 twenty to six 差二十分六点
1:58—2:02
四、加减乘除表示法 1. “加”用plus,and或add表示
How much is two plus three? Two and three is five. 2. “减”用 minus
How much is ten minus six? 3. “乘”multiply
3X4=? How much is three times four? 4. “除”用divide的过去分词形式表示 16÷4=? How much is sixteen divided by four?