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1、GramGrammar mar TeachTeachinging代词代词名词名词主格、宾格分类分类人称代词、物主代词、指示代词人称代词、物主代词、指示代词普遍代词、部分代词与与other有关的代词有关的代词Exercise TimeExercise Time（名词、代词）（名词、代词）数词数词2023/3/27数词的种类数词的种类基数词基数词用于数量的数词one two three four five six seven eight nine teneleven twelve thirteen fourteen fifteen sixteen seventeen eighteen ninete
2、en (teen）twenty thirty forty fifty sixty seventy eighty ninety (ty)hundred thousand milliondozen score2023/3/27数词的种类数词的种类序数词序数词用于排序的数词first second third 1st 2nd 3rd fourth fifth sixth seventh eighth ninth tenth 4th 5th 6th 7th 8th 9th 10th eleventh twelfth thirteenth fourteenth fifteenth 11th 12th 1
3、3th 14th 15th twentieth thirtieth fortieth fiftieth 20th 30th 40th 50th twenty-first thirty-second forty-third 21st 32nd 43rd 2023/3/27数词的种类数词的种类分数分数用于表示倍数的数词half quarter twice doublethree times four times 分子用基数词表示，分母用序数词表示a/one third 1/3two thirds 2/3也可以用“基数词+over+基数词”表示one over three nine over ten
4、读带分数的时候，先读整数，整数部分和分数部分要用and连接one and a half three and a quarterfive and two sevenths带分数后面的名词要用复数形式hourskilometersliters2023/3/27基数词基数词书写书写用英语书写的时候，两位数的数字中间要加上“-”（但一般直接用阿拉伯数字）英语中，习惯用逗号三位三位隔开数字E.g.1,247 365,305,779 1,003,450三位或三位以上的数字要在十位前加andE.g.5,304 five thousand,three hundred and four可以简单记成“只要百位上有
5、数字，就要用and，除了整百”，因为：370,480 three hundred and seventy thousand,four hundred and eighty 6,200 six thousand,two hundred读数读数2023/3/27基数词基数词听写数字的技巧听写数字的技巧2023/3/27基数词基数词数词的单复数数词的单复数当hundred,thousand,million,dozen,score等数字与确切数字一起用的时候，不以复数形式出现E.g.six hundred ten thousand two dozen eggs当hundred,thousand,mil
6、lion,dozen,score等数字与模糊数字或of一起用的时候，多以复数形式出现E.g.hundreds of people thousands of books dozens of eggs scores of ships此时，不和具体的数字一起用six thousands of books 2023/3/27基数词基数词小数小数小数点读作“point”，小数部分的数字依次直接读即可E.g.10.94 ten point nine four 12.549 twelve point five four nine不过，在用到金钱的时候，后面有时会按数字读法E.g.$7.15 seven do
7、llars and fifteen cents 或 seven fifteen dollars2023/3/27ExerciseExercise读数读数10,527 230,659 6,400 320 10,002,360 304,000,0006.23 10.643$5.45 2023/3/27基数词基数词零的读法零的读法u在算术中，零通常读成字母O或noughtE.g.603.05 six O three point O five 8.04 eight point nought/O four(or zero)0.05 point nought/O fiveu在温度中，零通常读成zeroE.
8、g.0.03 point zero three degrees centigrade -5 five degrees Fahrenheit below zero2023/3/27基数词基数词零的读法零的读法u在电话号码中，零通常读成字母OE.g.62507050 six two five O seven O five Ou在体育比赛中，零通常读成nil,nothingE.g.The result of the football match was 4:0.(four nil/four to nil/four to nothing)但是在乒乓球、网球这种比赛中，零读作“love”E.g.Five
9、 love,your service.（5:0，你发球）2023/3/27基数词基数词英美数词比较英美数词比较英国英语美国英语10亿1,000,000,000onethousandmilliononebillion1兆1,000,000,000,000onebilliononetrillion1千兆1,000,000,000,000,000onethousandbilliononequadrillion2023/3/27序数词序数词与与the的用法的用法u序数词前如果没有形容词性物主代词，通常都有theE.g.the fortieth day the twentieth visitoru但当我
10、们表达“又一次、再一次”的时候，不用the，用a/anE.g.He tried for a third time.（他又试了一次。）u当用于路名的时候，也不用theE.g.Excuse me,would you please tell me where Second Street is?2023/3/27序数词序数词first,at firstufirst表示先后顺序，“首先”E.g.I first learned English,and then Japanese.First come,first served.uat first强调“起初”，“刚开始”,相当于at the beginnin
11、g ofE.g.I found it difficult at first,but soon I understood it.2023/3/27分分数数halfuhalf表示一半，后面可以直接跟名词，也可以用于“half of+名词”E.g.I have read half the book.I have read half of the book.u在美式英语中，half an hour,half a mile也会被说成 a half hour,a half mileu注意以下的用法，都是正确的说法：one day and a half one and a half days one and
12、 half a day2023/3/27分分数数halfuhalf后面的动词形式由half后面的名词决定E.g.Half of the apples were eaten.Half of the apple was eaten.分别有几个苹果？2023/3/27分分数数倍数的用法倍数的用法1、倍数+as+形容词或副词原级+asE.g.This bridge is three times as long as that one.2、倍数+形容词或副词的比较级+than.E.g.This bridge is three times longer than that one.2023/3/27分分数
13、数倍数的用法倍数的用法3、倍数+the size/length/weight.+of+比较对象.E.g.This bridge is three times the length of that one.4、倍数+what引导的从句.E.g.The college is twice what it was 5 years ago.2023/3/27用法用法表示日期表示日期April 10th10th AprilApril 10 10 April500 B.C.（公元前）A.D.500（公元）1998 nineteen ninety-eight 2000 two thousand2001 two
14、 thousand and one2018 twenty eighteen20%twenty percent（动词单复数由后面的名词决定）八折twenty percent discount九五折five percent discount表示百分比表示百分比2023/3/27用法用法表示计算公式表示计算公式4+3=7 Four and three is/makes/equals seven.Four plus three is/makes/equals seven.7-4=3 Seven minus four is/equals/leaves three.Four from seven is/e
15、quals/leaves three.43=12Four times three is/makes/equals twelve.Four multiplied by three is/makes/equals twelve.123=4 Three into twelve is/equals/makes four.Twelve divided by three is/equals/makes four.2023/3/27用法用法表示计算公式表示计算公式2:4=3:6 Two is to four what three is to six.The ratio of two to four equa
16、ls the ratio of three to six.(7+3/8-3.884)1/5Seven plus three-eighths minus three point eight eight multiplied by four,all divided by one-fifth.2023/3/27用法用法表示计算公式表示计算公式 X2x squarex squared.Y3y cubey cubed.Z4z(raised)to the fourth(power).25=32Two raised to the fifth power is thirty-two.Two raised to the power of five is thirty-two.a2+2b=6 a squared and two times b makes six.a3-4b=8 a cubed minus four times b equals eight.270的平方根the square root of 270 400的立方根the cube root of 400.2023/3/27用法用法习语习语
