数词的用法 课件(共19张PPT)

(共19张PPT)
数词
数词分为基数词和序数词。
基数词的构成
（weekend
list）
右往左数,三位一组,逗号隔开.
thousand(千)
1，000
million
(百万)
1，000,000
billion
(十亿)
1,000,000,000
时间类型
表示法
例
读法
整点
基数词（+
o’clock)
1:00
几点过几分
分钟
+
past
+小时
2:10
30
分钟
half
+
past
+
小时
3:30
几点差几分
分钟
+
to
+小时
4:40
15分钟
=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
1.表时间
—1)
钟点时间
80
%
基数词
+
percent（%）
3.78
three
point
seven
eight
小数点
基数词的用法
2：百分数：
基数词的用法3：
小数：
一倍
once，两倍
twice，
三倍
three
times
(三倍或以上：
基数词＋times)
基数词的用法6：倍数
This
box
is
five
times
as
big
as
that
one.
这个箱子是那个箱子的五倍大。
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
数词的用法7
—
分数：
分子用基数词，分母用序数词，当分子超过“1”时，分母用复数。
____
of
the
land
_____
covered
with
trees
and
grass.
A.
Two
fifth,
is
B.
Two
fifth,
are
C.
Two
fifths,
is
D.
Two
fifths,
are
C
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
基数词的用法8
—
编号
1）.表示十几岁用teens指从13岁到19岁。
在某人十几岁时：
in
one’s
teens.
2）.表示
“几十岁”；用
in
one’s
+
整十数词复数
in
one’s
thirties
表示在某人三十几岁时
（30—39岁）。
在他五十多岁时，写作______________
3）18岁：eighteen
years
old
4）一个十八岁的男孩：an
18-year-old
boy
5）
in
his
fifties
数词的用法4
—
年龄：
at
the
age
of
+年龄：
在几岁的时候
①
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
②
He
came
to
China
____.
A.
at
the
age
of
20
B.
when
he
is
20
C.
at
age
of
20
基数词的用法4
—
年龄
基数词常与名词构成的合成词在句中作定语，中间要用连字符
“-”，这个名词只用单数形式．
a
seven-day
holiday
a
three-year-old
girl
①
The
river
is
about
____.
A.
6,000
meters
long
B.
6,000-meters-long
C.
6,000-meter-long
基数词的用法5
：计量
be
+
数词
+
量词
+
形容词
1）.
in
the
+数词的复数
，意为
在······年代，
如:in
the
nineties
在九十年代
可写作：in
the
90s
2）.
in
the+序数词+century,意为在……世纪
如：在19世纪
in
the
nineteenth
century
在十九世纪三十年代
写作
____________________
in
the
1830s
数词的用法9
—世纪年代
人民币
RMB：yuan
英镑
GBP：
pound(s)
美元
USD:
dollar(s)
欧元EUR:
euro（s）
?
常见钱币单位
[?j??r??]
常考习题
选择题
1.
-------
When
was
he
born?
--------
He
was
born
_________.
A.
in
1988
June
6
B.
on
June
6,in
1988
C.
in
June
6
,
1988
D.
on
June
6
,1988
2.
The
library
in
the
school
isn't
large
.There
are
only
_____books
in
it.
A.
six
thousand,
five
hundred
and
forty-one
B.
six
thousand
and
five
hundred
and
forty-one
C.
six
thousands
five
hundred
forty
and
one
D.
six
thousand
,
five
hundreds
and
forth
one
3.
Athough
I
failed
four
times
,
my
father
encouraged
me
to
try
a
_____time.
A
.
two
B.
four
C.
third
D.
fifth
D
A
D
4.
The
Olympics
Games
are
held
____________.
A.
every
four
years
B.
every
four
year
C.
every
fourth
years
D.
every
four-year
5.
The
yellow
river
is
____in
China.
It
goes
through
many
cities
in
China.
A.
the
second
longest
river
B.
the
longest
scond
river
C.
the
second
longest
rivers
D.
the
longest
scond
rivers
A
A
6.
In
our
school
more
than
_____boys
______like
English.
A.
two
fifths
;
don't
B.
two
fives
don't
C.
two
fifths
doesn't
D.
scond
five
doesn't
7.
The
car
cost
me
_____dollars.
A.
eight
thousand
B.
eight
thousand
of
C.
eight
thousands
of
D.
thousand
of
8.
The
war
took
place
_________.
A.
1720s
B.
1720's
C.
in
the
1720s
D.
the
1720
9.
I
got
a
beautiful
bike
on
______birthday.
I
like
it
very
much.
A.
fifteenth
B.
fifteen
C.
my
fifteen
D.
my
fifteenth
A
C
D
A
10
Five
minus
two_________three.
A.
was
B.
are
C.
were
D.
is
D
①102
②6500
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④第一
⑤第五
⑥第二十一
⑦1/3
⑧2/7
⑨9.8
⑩2：00
作业：
①5：30
②5:06
③7:58
④70％
⑤69
％
⑥在1983年
⑦在20世纪50年代
⑧在1998年4月1号
⑨在9月
⑩在10月1号