小升初英语通用版数词课件（51张PPT）

(共51张PPT)
数词
Numerals
　表示数目多少或顺序多少的词叫数词，数词分为基数词和序数词。表示数目多少的数词叫基数词；表示顺序的数词叫序数词。
1
基数词（
cardinal
number）
1
one
two
three
4
four
5
five
6
six
7
seven
8
eight
9
nine
10
ten
11
12
13
14
15
16
17
18
19
eleven
twelve
thirteen
fourteen
fifteen
sixteen
seventeen
eighteen
nineteen
20
30
40
50
60
70
80
90
100
twenty
thirty
forty
fifty
sixty
seventy
eighty
ninety
one
hundred
基数词的构成
1）1－12,
独立成词。
one
two
three
four
five
six
seven
eight
nine
ten
eleven
twelve
2）13--19,
由3－9
+
teen构成。
14–fourteen
16--sixteen
17--seventeen
19—nineteen
特殊拼写:
13–
thirteen
15--fifteen
18—eighteen
3）20－90,
以-ty结尾。
20—twenty
30---thirty
40—forty
50—fifty
60---sixty
70---seventy
80---eighty
90—ninety
4）21－99，
两位数，十位与个位之间有
“-”。
21
twenty-one
55
fifty-five
99
ninety-nine
5）101—999，三位数，百位与十位/个位之间加and。
101
one
hundred
and
one
840
eight
hundred
and
forty
693
six
hundred
and
ninety-three
29
7
and
729
hundred
seven
03
5
and
再来一个
503
hundred
five
109
432
170
865
注：
1、1000以上几个的词，每三位数加一个逗号，第一个逗号前的数为thousand，第二个逗号前的数为million（百万）,
第三个逗号前的数为billion（十亿），第四个逗号前的数为trillion（万亿）
888,
888，888，888，888
eight
hundred
and
eighty-eight
trillion,
eight
hundred
and
eighty-eight
billion,
eight
hundred
and
eighty-eight
million,
eight
hundred
and
eighty-eight
thousand,
eight
hundred
and
eighty-eight
trillion
[?tr?lj?n]
万亿
billion
[?b?lj?n]
十亿
million
[?m?lj?n]
百万
thousand
['θa?znd]
千hundred
[?h?ndr?d]
百
29
,
431
500
7
6
,
,
thousand,
hundred
million,
billion,
and
6)
1，000以上数目,从右向左每三位用“，”
分开,分别读为thousand
,
million,
billion
千
百万
十亿
基数词的构成
基数词的构成
four
thousand,
three
hundred
and
twenty-one
seven
million,six
hundred
and
fifty
four
thousand,
three
hundred
and
twenty-one
7,654,321
1,987,654,321
4321
4,321
one
billion,
nine
hundred
and
eighty-seven
million,six
hundred
and
fifty-four
thousand,
three
hundred
and
twenty-one
1.
hundred
thousand
(表示具体数字)
million
billion
2.
hundreds
thousands
(表示概数)
millions
billions
三.基数词的用法
数词
(several)+
+
of
基数词的用法
1、表示具体数目,hundred,
thousand,
million不用复数
表示不确定数目,用复数。即hundreds
of(数百),
thousands
of(数千),
millions
of(数百万)+
名词复数。
1)
Our
country
has
a
population
of
1,300
million
people.
2)
There
are
several
thousand
students
in
our
school.
3)
After
the
war,
thousands
of
people
became
homeless.
warming
up
1.
_______
tress
were
planted
on
the
mountain
last
year.
　A.
Thousands
of
B.
Thousand
of
C.
Five
thousand
of
D.
Five
thousands.
2．______
of
the
students
are
girls
in
our
class．
A．Two
three?B．Two
threes
C．Two
thirds?D．Second
three
3.----When
was
he
born?
----He
was
born
on
________.
A.
second
of
October
B.
the
October
three
C.
October
the
second
D.
three
of
October
1.
—
If
a
=
3,
b=4,
what’s
the
answer
to
the
problem,
a+2ab+1=?
—
the
answer
is___.
A.
twenty
eight
B.
twenty-eighth
C.
twenty-eight
2.
In
our
school
about
five
__
students
are
able
to
surf
the
Internet
.
A.
hunderd
of
B.
hunderds
of
C.
hundred
3.
__
sheep
were
killed
in
the
accident.
A.
Thousand
of
B.
Thousand
C.
Thousands
of
4.
There
are
over
nine
__
workers
in
the
factory,
but
__
of
young
people
hope
to
work
in
it.
A.
hundred
0f;
hundreds
B.
hundred;
hundreds
C.
hundreds;
hundred
5.
people
in
the
world
are
sending
information
by
e-mail
every
day.
A.Several
million
B.Many
millions
C.Several
millions
D.Many
million
2
序数词（
ordinal
number）
序数词的构成
1)
1－3,
first,
second,
third
。
2)
4－19,
相应基数词+th,
fourth,fifth,sixth,seventh,eighth,ninth,tenth,eleventh,twelfth,thirteenth,fourteenth,fifteenth,sixteenth,seventeenth,eighteenth,nineteenth.
3)
20－90,
y变成ie
+th,
twentieth,thirtieth,fortieth,fiftieth,sixtieth,seventieth,eightieth,ninetieth。
4)
21－99,
只把个位的基数词变成序数词
如twenty-first,ninety-ninth
5)
序数词缩写----数字＋最后两字母
如1st,
2nd,
3rd
,4th…
基变序,有规律,词尾加上“th”，
一、二、三，特殊记，结尾字母t,d,d
八去“t”，九去“e”，“f”要用ve替
见“y”变成“i”和“e”，词尾加上“th”，
若是遇到几十几，只变个位就可以。
序数词缩写记清楚,数字后跟两字母。
(序数词构成规律)
基数词
序数词
基数词
序数词
one
twelve
two
twenty
three
twenty-one
four
forty
five
one
hundred
six
one
hundred
and
five
eight
one
hundred
and
twenty-nine
nine
nineteen
一.基数词、序数词
first
second
third
fourth
fifth
sixth
eighth
ninth
twelfth
twentieth
twenty-first
fortieth
one
hundredth
one
hundred
and
fifth
one
hundred
and
twenty-ninth
nineteenth
时间类型
表示法
例
读法
整点
基数词（+
o’clock)
1:00
﹤30分钟
分钟
+
past
+小时
2:10
=
30
分钟
half
+
past
+
小时
3:30
﹥30分钟
（60-分钟）
+
to
+（小时
+
1）
4:40
分钟逢15
即
一刻钟
a
quarter
5:15
6:45
简化法
按顺序读基数词
7:50
one
o’clock
ten
past
two
half
past
three
twenty
to
five
a
quarter
past
five
a
quarter
to
seven
seven
fifty
表示在几点钟用介词
at
数词的表示法
—
时间
1.—
It’s
already
7:40
now.
When
will
the
film
start?
—___.
We
still
have
five
minutes.
A.
A
quarter
to
seven
B.
A
quarter
to
eight
C.
Seven
past
forty-five
①
月日年
在1998年10月1日
数词的表示法
—
年月日
on
Octorber
the
first,
nineteen
ninety-eight
日
the
+
序数词
月
首字母大写
月日与年之间用
，分开
年
（两位两位读）
on
August
the
ninth
in
May,
two
thousand
and
ten
天
日用
on
年
月用in
on
Oct.
1st
,
1998
②
月日
在8月9日
③
月年
在2010年5月
1.
The
accident
happened
on___.
A.
April
5,
2001
B.
2001,
April
5
C.
April
2001,
5
2.
I
was
born
___.
A.
in
March
8,
1993
B.
on
July
9,
1994
C.
on
May,
1995
20世纪90年代
in
the
1990s/1990’s
在他50多岁时
in
his
fifties
数词的表示法
—
1.年代世纪
in
the
in
one’s
+
整十基数词复数
在某人几十岁时
nineteen
nineties
2、“基数词+名词”
的合成形容词作定语，
中间有连字符“－”,当中的名词用单数。
a
3
–
year
–
old
girl
a
seven-day
holiday
3、表计量--
“基数词+度量单位+形容词”
The
classroom
is
7
meters
long,
6
meters
wide
and
3
meters
high.
1.
There
will
be
more
chances
in
__
century
than
in
__
century.
A.
twenty-one,
twenty
B.
twenty-first,
twentieth
C.
the
twenty-first,
the
twentieth
2.
The
city
changed
a
lot
___.
A.
in
1980's
B.
in
the
1980s
C.
in
the
1980
3.
He
graduated
in
__
of
__
century.
A.
the
sixtieth;
twenty
B.
sixty;
the
twentieth
C.
his
sixties;
the
twentieth
4.
She
got
the
prize
__.
A.
in
her
fifties
B.
in
fifties
C.
in
her
fifty
5.
The
winner
is
___.
He
is
an
___
boy
.
A.
eight-year-old;
eight
years
old
B.
eight
years
old;
eight-year-old
C.
eight-years
old;
eight-year-old
6.He
came
to
China
____.
A.
at
the
age
of
20
B.
when
he
is
20
C.
at
age
of
20
7.The
river
is
about
____.
A.
6,000
meters
long
B.
6,000-meters-long
C.
6,000-meter-long
be
+
数词
+度量词
+
形容词
1
5
分子
基数词
分母
序数词
one
fifth
2
7
分子
﹥
1
分母
+
s
two
sevenths
1
4
分子
a
分母
quarter
a
quarter
3
4
three
quarters
1
2
a
half
1
3
three
and
one
third
3
基数词
+
and
+
分数
数词的表示法
—
分数百分数
80
%
基数词
+
percent
eighty
percent
百分数
+
of
+
可数名词复数
谓语动词用复数
百分数
+
of
+
不可数名词
谓语动词用单数
Seventy
percent
of
students
in
our
class
are
girls
Over
seventy
percent
of
the
earth's
surface
is
covered
with
water
1.
__
of
the
students
__
boys
in
Class
A.
Two
three;
are
B.
Two
thirds;
are
C.
Two
thirds;
is
2.
__
of
her
money
__
spent
on
clothes.
A.
Two
three;
are
B.
Two
thirds;
is
C.
Two
third;
is
3.
__
the
teachers
in
our
school
is
about
one
hundred,
and
__
of
them
are
women
teachers.
A.
The
number
of;
two
thirds
B.
The
number
of
;
two
third
C.
A
number
of;
two
thirds
一个半小时
两个半小时
two
and
a
half
hours
=
two
hours
and
a
half
one
and
a
half
hours
=
one
hour
and
a
half
数词的表示法
—
半的表示法
1.
The
boy
always
stays
there
for
__.
A.
three
and
half
hour
B.
three
hour
and
a
half
C.
three
and
a
half
hours
2.
The
old
man
drank__
beer.
A.
two
bottles
and
a
half
B.
two
and
a
half
bottle
C.
two
bottle
and
a
half
一倍
once，两倍
twice，
三倍
three
times
(三倍或以上
基数词＋times)
数词的表示法
—
倍数
This
box
is
five
times
as
big
as
that
one.
=This
box
is
four
times
bigger
than
that
one.
①
A
+
be
+
倍数
+
as
+adj.原+
as
+B.
A是B的
…倍…
②
A
+
be
+
倍数
+
adj.比+
than
+B.
A比B
…
…倍
1.
This
building
is
__
that
building.
A.
three
time
as
tall
as
B.
twice
taller
than
C.
three
times
as
taller
as
2.
我的箱子比你的重六倍!
My
box
is
____________________
yours.
2.What
a
table!
I've
never
seen
such
a
thing
before.It
is
it
is
long
.
A.half
not
as
wide
as
B.wide
not
as
half
as
C.not
half
as
wide
as
D.as
wide
as
not
half
six
times
heavier
than
seven
times
as
heavy
as
一般编码用
名词
+
基数词
207房
三年级一班
第五部分
第一课
3
号汽车
第一中学
Room
207
Class
One
Grade
Three
Part
five
=
the
fifth
part
Lesson
one
=
the
first
lesson
Bus
No.3
=
the
No.3
bus
No.
1
Middle
School
数词的表示法
—
编号
1.My
mother
lives
at
on
floor.
A.Room
Six;the
second
B.Six
Room;second
C.Room
six;two
D.the
room
six;the
second
(1)
小数的读法
小数点左边的数通常按基数词读，若为三位以上的数，也可按编码式读法读出，即将数字单个读出；小数点右边的数通常按编码式读法单个读出。如：
6.86
six
point
eight
six
14.15
fourteen
point
one
five
(2)
小数中“0”的读法
“0”在小数中通常读作nought（英）或zero（美），也可读作字母o。如：
0.08
（nought）point
nought
eight
或
（zero）point
zero
eight
小数表示法
6+5＝11
Six
plus
five
is
eleven
或
Six
and
five
is
eleven.
11-6＝5
Eleven
minus
six
is
five.
或
Six
from
eleven
is
five.
4×5＝20
Four
multiplied
by
five
is
twenty.
或
Four
times
five
is
twenty.
20÷4＝5
Twenty
divided
by
four
is
five.
或
Four
into
twenty
goes
five.
3
Three
squared
is
nine.
2
Two
cubed
is
eight.
加减乘除式的表达方法
2
3
表示“大约、接近”，常用nearly,
about,
some,
almost,
around
等。
about
700
people
some
fifty
years
ago
表示“左右”用or
so
In
the
past
five
years
or
so
“少于”用less
than
Less
than
30
years
old
不到30岁
“多于”用
more
than
,
over
More
than
a
year
ago
over
70
years
ago
约数表示法
(1)序数词作定语，前面要加the；
The
first
truck
is
carrying
a
food
basket．
John
lives
on
the
fifteenth
floor．
She
is
my
first
English
teacher.
(2)有时加a/an，“再一”，“又一”
的意思
We‘ll
have
to
do
it
a
second
time．
Shall
I
ask
him
a
third
time？
When
I
sat
down，a
fourth
man
rose
to
speak．
They
had
a
second
child
in
1988
序数词的用法
选择填空。
1．March
is
____month
of
a
year．
A．
a
three
B．
the
third
C．
a
third
2．We
will
have
a
meeting
at
8:05____．
A．five
to
eight
B.eight
to
five
C．eight
past
five
3．Eight
plus
eight
is____.
A．sixteen
B．sixty-four
C．one
4．He
is
an
____boy．
A．eight
years
B．eight-year-old
C．eight-years-old
5．We
will
have
a___
walk．
A．ten
minutes
B．ten
minutes‘
C．ten-minutes
6．The
wall
is____.
A．four
meters
long
B．four
meter
long
C．four-meter
long
7．What‘s
the
date
today?
It’s___．
A．March
the
eight
B．March
the
eighth
C．eight，March
8．It
happened
in
the
1040's．
A．
in
the
forties
of
the
eleventh
century．
B．
in
the
forties
of
the
tenth
century．
C．
in
the
forty
9．About_____________
of
the
earth's
surface
is
covered
with
water.
A.
three-fours
B.
three-fourth
C.
three-fourths
10.
He
went
down
to
the
village
which
was
___miles
away
from
the
city.
A.
three
hundreds
B.
three
hundred
C.
three
hundreds
of
Homework
1.Grammar
focus
textbook(p30)exercise1-2
2、Workbook(p19)
exercise4
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