初二英语数词.(修改稿)doc

V. Numeral [ nju:m☯r☯l] 数词1、数词分为基数词和序数词，基数词用于计数，序数词用于表示位置或顺序，序数词一般在基数词后面加th构成，个别例子除外，如：２、多位数的读法：888读作eight hundred and eighty-eight888，001读作eight hundred and eighty-eight thousand and one888，000，888读作eight hundred and eighty-eight millon, eight hundred and eighty-eight (十位和个位最后用and )基数词在hundred, thousand, millon和billion修饰名词时,后面不能加s，复数名词才加s，如：two hundred students 二百学生five thousand years 五千年如果大量的不确定数目和复数形式，可以这样表达：hundreds of people 数以百计的人thousands of trees成千上万棵树millions of stars 数百万颗星星３、年、月、日和时间表达法年代表达：1999：nineteen ninety-nine 2000：two thousand 2004：two thousand and four20世纪９０年代：nineteen nineties 21世纪２０年代：twenty twenties在六月一日on June 1st 读作on June the first在2004年五月四日on May 4th 读作on May the fourth, two thousand and four时间长度：ten minutes十分钟 a quarter ( fifteen minutes) 一刻钟half an hour ( thirty ninutes, two quarters 半小时。

an hour (sixty minutes )一小时时间的刻度：顺读法倒读法5:00 five ( o clock )6:20 six twenty twenty past six12:15 twelve fifteen fifteen past twelve4:30 four thirty half past four5:50 five fifty ten to six4:45 four forty-five a quarter (fifteen )to five凡是正点时间，在读数时，可加o clock如at five o clock . at ten o clock（十点钟）at twelve68o clock （十二点）非正点不能加上o clock ，如十一点半：at half past eleven 或at eleven thirty.凡是十五分钟fifteen 可用a quarter 互换。

４、加、减、乘、除，倍数、分数、约数表示法 加：３＋５＝８ 读作 Three plus five is eight. 减：９－７＝２ 读作 Nine minus seven is two. 乘：６⨯５＝30 读作 Six times five is thirty除：８÷２= 4 读作 Eight divided by two is fourplus (加) minus 减 times 乘 divided by 除 （以上四个词均为介词） 倍数：和一样大 as big as等于二倍大 twice as big as等于三倍大 three times as big as比…..大四倍 four times larger than …… 比…..高两倍 twice higher than …….. 和…..一样深 as deep as比….深三倍 three times deeper than ….. 和….一样宽 as wide asThe students in our school are three times larger than those in theirs, the teachers are three times as large as those in theirs. 我们学校的学生比他们的多三倍，教师是他们的三倍。

分数：分子用基数词，分母用序数词，分子大于1时，分母用复数。

如：1/5 one fifth; 3/4 three fourths; 2 two and two thirds; 1/2 a (one) second , a (one) half; 1/4 a (one) fourth , a (one) quarter; 3/4 three fourths, three quarters.小数：0.39读zero point three nine; 95.78读作 ninety-five point seven eight. 小数点前面的整数按照基数词读，小数后面的数按照数字本身读。

（小数点读point ） 百分比： 百分数，在基数词后加percent 。

如：25% 读作twenty-five percent; 70%读作seventy percent,99.9%读作：ninety-nine point nine percent. (per cent 或percent 百分之几) 100%，one hundred percent表示约数 “多于”用more than 或over ，如：The street is more than one thousand metres long. 这条街有一千多米长。

“少于”用less than, 如：There are less than forty students in the classroom.。

教室里不到四十个学生。

“最少”用at least ，如：There are thirty thousand people at least in the town. 镇里最少有三万人。

“或…..以下”用or less ，如：The house can hold ten people or less. 这座房子可容纳十人或十人以下。

“大约”用about, nearly, around ，如：The old man is about seventy. 这老头大约七十岁。

The village is nearly twenty kilometers from the town.. 这村子离镇大约二十公里。

“左右”用or soIt will take us 50 years or so to build China into a mid-developed country. 我们用五十年左右时间把中国建设成中等发达国家。

The developed country 发达国家，the developing country 发展中国家。

用适当的数词填空，使句子通顺、合理、完整。

1. There are ____________ seasons in a year. 2. There are ____________ days in a week.23 693.There are _____________ months in a year.4.There are _____________ weeks in a year.5.There are ___________ hours in a day.6.May is ___________ month of the year.7.September is the ______________ month of the year.8.December is the ______________ month of the year.9.Sunday is the ____________ day of the week.10.The Yellow River is the ______________ longest in China.11.Women s Day is March ______________.12.There are _____________ minutes in an hour.13.Christmas Day is December ____________.14.Mother s Day is the ______________ Sunday of May.15.The ___________ Sunday in June is Father s Day.16.Thanksgiving Day is the ____________ Thursday in November.17.Seven plus five is ________________.18.Twenty divided by four is ______________.19.Ten minus three is ______________.20.Five times five is ______________.21.5:45 reads ________________________or a quarter to ________________.22.3+4=7 reads ________________________________.23.4 3=12 reads _______________________________.24.5-2=3 reads _____________________________.根据所给汉语，完成句子（凡数字一律写英语）1.中国有十三亿人。

China has ________________________________people.2.月球离地球三十八万公里。

The moon ______________________________________ kilometers from the earth.3.喜马拉雅山有8848米高。

Mountain Himalaya is _________________________________ high.4.中国是一个具有五千年历史的伟大国家。

China is a great country with________________________.5.海伦是个十多岁的女孩。

Helen is a ___________________________ girl.6.下周我们有一个半个月的假期。