(共30张PPT)
数 词
Numeral
I. 定义
数词是指表示数目多少或顺序多少的词。
数词可以作句子的主语、宾语、表语和定语。
1, 什么是数词?
2, 数词在句子中可以担任什么成分?
执行句子行为或动作的主体,即动作的发出者。
主语:
宾语:
表语:
定语:
又称授词,即动作的承受者。
属于主语补足语,补充说明主语的身份、
性质、品性、特征和状态的词或句子。
用来修饰、限定、说明名词或代词的品质与特征。
II. 分类
1. 基数词
2. 序数词
数词
Eg: one, two, three
Eg: first, second, third
III. 基数词
1. 基数词是什么?
表示数目的词叫基数词。
Eg:
1
one
2
two
3
three
2. 英语中常用的基数词
1 2 3 4 5
one
two
three
four
five
six
seven
eight
nine
ten
6 7 8 9 10
11 12 13 14 15
eleven
twelve
thirteen
fourteen
fifteen
sixteen
seventeen
eighteen
nineteen
twenty
16 17 18 19 20
21 22 23 ...
twenty-one
twenty-two
twenty-three
...
thirty
forty
fifty
sixty
seventy
30 40 50 60 70
80 90 100 0
eighty
ninety
one(a) hundred
zero
101 1000
one hundred and one
one (a) thousand
ten thousand
One hundred thousand
10,000 100,000
1000,000 1,000,000,000 1,000,000,000,000
one million
one billion
one trillion
小试牛刀
一.写出下列基数词
29 _____________ 35 _____________
11 _____________ 80 _____________ 15 _____________ 19 _____________ 14 _____________ 90 _____________ 15 _____________ 8 _____________
13 _____________ 0 _____________ 51 _____________ 12 _____________
100 _______________ 10 _____________
twenty-nine
thirty-five
eleven
eighty
fifteen
nineteen
fourteen
ninety
fifteen
eight
thirteen
zero
fifty-one
twelve
one(a) hundred
ten
二.用英语填入适当的数字。1. five + seven = ______________
2. seventy-two ÷ ____________ = nine
3. five + six = ______________
4. ______________ - seven = three5. ______________ - five = fourteen
6. fifty - _________________ =five7. ten ×ten =__________________
8. twenty – two= ________________
9. zero + eight = ________________
10.four × nine = _________________
thirteen
eight
eleven
ten
nineteen
forty-five
one(a) hundred
eighteen
eight
thirty-six
(1) 百位与十位之间要加 and; 十万位和万位, 亿位和千万位之间通常也要加 and。(2) 英语用千、百万等单位计数, 大数字从右向左看, 每隔三位划一逗号, 倒数第一个逗号之前要用 thousand,倒数第二个逗号之前要用 million, 倒数第三的逗号之前要用 billion 表示。(3) hundred、 thousand、 million 作数词时, 不用复数, 前面可以加上 one, two, 等其它数词。 用作名词时复数表示“成 上 ” , 后面必须要有 of, 前面可以加上 some, many, several 等词。 如:five hundred(五百) , hundreds of(成百上千的) , ten thousand(一万) , thousands of(成千上万的) ,millions of(成百万的)
3. 注意
1. 序数词是什么?
表示顺序的数词叫序数词。
Eg:
1
first
2
second
3
third
IV. 序数词
2. 英语中常用的基数词
1st 2nd 3rd 4th 5th
first
second
third
fourth
fifth
sixth
seventh
eighth
nineth
tenth
6th 7th 8th 9th 10th
11th 12th 13th 14th 15th
eleventh
twelfth
thirteenth
fourteenth
fifteenth
sixteenth
seventeenth
eighteenth
nineteenth
twentieth
16th 17th 18th 19th 20th
21th 22th 23th ...
twenty-first
twenty-second
twenty-third
...
thirtieth
...
30th ... 100th
hundredth
101th 1000th
one hundred and first
one (a) thousandth
ten thousandth
One hundred thousandth
10,000th 100,000th
1000,000th 1,000,000,000th 1,000,000,000,000th
one millionth
one billionth
one trillionth
3. 英语的序数词基本变法:
(1) 一般在基数词后加 th;
(2) -ve 结尾的改为-f,再加th;
(3) -ty 结尾的改为-tie,再加th;
(4) 熟记特殊词。
Eg:four→fourth
Eg:five→fifth
Eg:thirty→thirtieth
Eg:one→first, two→second,
基数词变序数词的用法口诀:
基变序,有规律;
词尾加上-th。
1、2、3 特殊记,
词尾字母 t, d, d。
8 少 t, 9 去 e,
ve 要用 f 替,y 变成 ie。
若是遇见几十几,
只变个位就可以。
(1) 两位以上的序数词仅个位数部分用序数词, 其余部分仍用基数词。
4. 注意
Eg: thirty-sixth,
(2) 使用序数词时一般加定冠词 the.
Eg: I' m in the third grade.
(3)序数词作“几分之几”讲时, 有复数形式。
Eg: 1/5→one fifth ; 2/3→ two thirds ;
4/7→ four sevenths ; 1/2→ a half ;
1/4→a quarter ; 3/4→ three quarters ;
50%→ fifty hundredths ( fifty per cent) .
小试牛刀
一、写出下列序数词1. one ____________ 2.nine ____________
3. six____________ 4.five ____________
5.ten ___________ 6.twelve ___________ 7.eight ___________ 8.three ____________
9.two___________ 10.twenty___________
11.fifty-five _________________
12.twenty-one__________________
first
ninth
ninth
fifth
tenth
twelfth
eighth
third
second
twentieth
fifty-fifth
twenty-first
二、写出下列单词的基数词1. third _______________
2. fourth _______________ 3. tenth _______________
4. twentieth _______________ 5. nineteenth _______________
6. thirty-first _______________
7. twelfth _______________
8. thirty-second _______________
9. fifth _______________
10. eighth _______________
three
four
ten
twenty
nineteen
thirty-one
twelve
thirty-two
five
eight
1) 表示年份:
2) 表示日期:
3) 表示时刻:
4) 表示编号:
V. 数词的用法
5) 小数的读法:
6)“半”的表达:
7) 序数词前面加the 时, 表示顺序, 加a/an 时表示:再一, 又一。:
1) 表示年份:
2) 表示日期:
3) 表示时刻:
4) 表示编号:
Eg:2022→twenty thousand and twenty-two
Eg:12 月 1 日→ Dec. 1st
或 the first of December
Eg:5:15→ five fifteen
或 a quarter past five
Eg: Room 105→Room one 0 five
Bus No. 13→Bus Number Thirteen
V. 数词的用法
5) 小数的读法:
6)“半”的表达:
7) 序数词前面加the 时, 表示顺序, 加a/an 时表示:再一, 又一。:
Eg:0.16 →zero point one six.
5.7→ five point seven
Eg:1/2→half, 半小时→half an hour,
1.5 小时→one and a half hours
或 one hour and a half.December
Eg: The third lesson is rather difficult. (第三课相当难)
1,Summer is ________season of the year, A.second B. a second C.the second2. --What time is it -- It's________(7:40) A.twenty to eight B.twenty to seven C.twenty past eight3. There are ________workers in this city. A .seven hundred and twenty six B .seven hundred twenty- six C.seven hundred and twenty- six4. Christmas Day is on ________ A. January 1st B. December 25th C.May 5th5. Thursday is ________ day of the week. A. the fiveth B. five C. the fifth
牛刀小试
C
A
C
B
B
基 数 词 序 数 词 1 one 1st first
2 two 2nd second
3 three 3rd third
4 four 4th fourth
5 five 5th fifth
6 six 6th sixth
7 seven 7th seventh
8 eight 8th eighth
9 nine 9th ninth
10 ten 10th tenth
11 eleven 11th eleventh
12 twelve 12th twelfth
13 thirteen 13th thirteenth
14 fourteen 14th fourteenth
15 fifteen 15th fifteenth
16 sixteen 16th sixteenth
17 seventeen 17th seventeenth
18 eighteen 18th eighteenth
19 nineteen 19th nineteenth
20 twenty 20th twentieth
30 thirty 30th thirtieth
40 forty 40th fortieth
50 fifty 50th fiftieth
60 sixty 60th sixtieth
70 seventy 70th seventieth
80 eighty 80th eightieth
90 ninety 90th ninetieth
100 one(a) hundred 100th one(a) hundredth
23 twenty-three 23th twenty-third
35 thirty-five 35th thirty-fifth
101 one hundred and one 101th one hundred and first
1000 one(a) 1000th one(a) th
10000 ten 10000th ten th
100000 Onehundred thousand 100000th one th
1000000 onemillion 1000000th onemillionth
10000000 ten million 10000000th ten millionth
100000000 one hundred million 100000000th one hundred millionth
108 one hundred and eight 108th one hundred and eighth
146 one hundred and forty-six 146th one hundred and forty-sixth
500 five hundred 500th five hundredth
1001 one thousandand one 1001th one thousandand first
1813 one thousand eight hundred and thirteen 1813th one thousand eight hundred and thirteenth
1. Read and recite the common nemerral.
2. Write at least 8 centences use we learned today.
3. Complete the corresponding对应的 questions in word book.
Homework
Class is over!
See you next time!