牛津上海版九年级下册数词用法专题学案（含答案）

数词的用法
一、定义：表示“多少”和“第几”的词，叫数词。数词分为基数词和序数词两种。
二、基数词和序数词的用法：1)
基数词
one,
two,
three...,
表示“一、二、三......”等。注意eleven,
twelve,
thirteen,
fifteen,
eighteen,
twenty,thirty,
forty,
fifty,
eighty,
a/one
hundred/thousand等词的拼写。2)
序数词first,
second,
third...,
表示“第一、第二、第三......”等，注意first,
second,
third,
fifth,
eighth,
ninth,
twelfth,
twentieth,
twenty-first,
ninety-ninth,
(one)
hundredth等词的拼写。基数词与序数词的构成基数词序数词基数词序数词基数词序数词onefirst
1steighteighth
8thtwenty-onetwenty-first
21sttwosecond
2ndnineninth
9thninety-nineninety-ninth
99ththreethird
3rdtwelvetwelfth
12thone
hundredone
hundredth
100thfivefifth
5thtwentytwentieth
20th基数词变序数词的口诀：基变序，有规律，词尾加上th。
一、二、三，特殊记，词尾字母t,
d,
d(first,
second,
third)。八少t,
九去e(eighth,
ninth),
ve要用f替(fifth,
twelfth)。整十变序也容易，y变成ie
就可以。(ninetieth)。几十几(twenty-five),
只变个位就可以。(twenty-fifth)3)
钟点表达法11:15读作eleven
fifteen或a
quarter
past
eleven9:30读作nine
thirty或half
past
nine7:35读作seven
thirty-five或twenty-five
(minutes)
to
eight11:45读作eleven
forty-five或a
quarter
to
twelve10:20
a.m.
读作ten
twenty
a.m.2:30
p.m.
读作two
thirty
p.m.4）日期表达法具体日期前要用介词on表示。在10月10日：
on
October
10读作on
October
(the)
tenthon
10th
October读作on
the
tenth
of
October在2008年7月20日：on
July
20,
2008读作on
July
(the)
twentieth,
two
thousand
and
eight5）年份表达法月份和年份前要用介词in表示。在1975年：in
1975读作in
nineteen
seventy-five在2005年：in
2005读作in
two
thousand
and
five
在2009年3月：in
March,
2009读作in
March,
two
thousand
and
nine6）分数、小数、百分比表达法a.
分数的构成分子用基数词，分母用序数词，分子分母间用连字符。分子大于1，序数词用复数形式。1/4
one-fourth,
1/12
one-twelfth,
2/3
two-thirds,
4/19
four-nineteenths特殊用法：1/2
a/one
half,
1/4
a/one
quarter,
3/4
three
quarters分子分母数值较大,
如55/88可读作：fifty-five
over
eighty-eightb.
小数和百分比0.37读作zero
point
three
seven
58%读作fifty-eight
percent
7）基本数学运算表达A:
How
much
is
8
plus
9?B:
8
plus
9
is/equals
17.(8+9=17)18-3=15
18
minus
3
is/equals
15.6×5=30
6
multiplied
by
5
equals/is
30.15÷5=3
15
divided
by
5
equals/is
3.注意①编号可以用序数词也可以用基数词，数字较大一般用基数词。Lesson
Six或the
sixth
lesson
Room
405Part
One或the
first
part
Channel
5/FiveClass
Two,
Grade
One
No.
10
Bus或Bus
No.
10②含有数词的定语：a
five-day
holiday
a
three-year-old
daughteran
800-word
composition
a
two-meter-deep
swimming
pool③其他习惯表达和固定词组：in
one’s
forties
在......四十多岁时at
the
age
of
forty
在四十岁时in
the
1990s
在二十世纪九十年代hundreds
of,
thousands
of,
millions
of
数百的，数千的，数百万的one
and
a
half
years=one
year
and
a
half
一年半two
and
a
half
months=two
months
and
a
half
两个半月IV.选择填空。（错误率：
掌握情况：
）I.Choose
the
best
answer.(
)
1.
During
World
War
II,
a
Jewish
(犹太)
lady
was
protected
by
a
local
family
in
Shanghai
in
her
______.A.
fifties
B.
fifty
C.
fiftieth
D.
the
fiftieth(
)
2.
Rose
received
a
letter
full
of
love
from
her
parents
on
her
______
birthday.A.
sixteen
B.
sixteen’s
C.
sixteenth
D.
sixteenths(
)
3.They’ve
done
only
______
of
the
work.
It’s
impossible
for
them
to
finish
it
on
time.A.
three-tenth
B.
three-tenths
C.
third-tenths
D.
third
tenth(
)
4.
-
How
many
new
words
are
there
in
______
lesson?-
There
are
only
______.A.
five;
fifth
B)
fifth;
five
C.
the
fifth;
the
five
D.
the
fifth;
five(
)
5.
About
______
of
the
boys
______
interested
in
the
game.A.
three-fourths;
is
B.
three-four;
is
C.
three-fourths;
are
D.three-fours;
are(
)
6.-Is
tomorrow
your
father’s
______
birthday?-No,
it’s
his
forty-sixth
birthday—he
is
already
in
his
______.A.
forties;
fortieth
B.
fortieth;
forties
C.
fortieths;fortieth
D.
forty;
forties(
)
7.
The
captain
has
an______
son.A.
eleven-years-old
B.
eleven
years
oldC.
eleven
year
old
D.
eleven-year-old(
)
8.
The
street
is
about
______
wide.A.
two
meters
B.
two
meter
C.
a
two
meter
D.
a
two-meter(
)
9.
We
watched
an______
performance
given
by
London
at
the
closing
ceremony
of
the
Beijing
Olympic
Games.A.
eight
minutes
B.
eight
minute
C.
eight-minutes
D.
eight-minute(
)10.
About
______
schools
in
the
city
welcomed
a
new
kind
of
letter
box
in
mid-September.A.
hundred
B.
hundreds
of
C.
two
hundreds
D.
two
hundred(
)11.
________
of
the
students
of
Grade
________
are
girls
who
like
singing.A)
Three-fifths
...
Nine
B)
Three-fifth
...
NinthC)
Three-fifths
...Ninth
D)
Three-fifth
...
Nine(
)12.______
Chinese
make
their
way
back
home
before
the
Spring
Festival.A）Million
of
B)Ten
millions
C)Millions
of
D)Ten
millions
of(
)13.
The
CN
TV
Tower（which
is
in
Canada）is
a
_______
building.
DA.553
meters
tall
B.
553-meters
tall
C.
553-meters-tall
D.
553-meter-tall(
)14.
Obama
paid
a
______
visit
to
China.
He
was
warmly
welcomed
by
Chinese
people.A)
four
days
B)
four-day
C)
four-days
D)
four-days'(
)15.Over
_______students
in
our
school
like
surfing
on
the
Internet.A)
three
hundred
B)
three
hundreds
C)
hundred
of
D)
three
hundred
of
II.
Fill
in
the
blanks
with
the
proper
form
of
the
given
verbs.1.
Our
new
flat
is
on
the
__________
floor,
and
we
have
a
good
view
of
the
park.(ten)2.
Mum
made
a
big
chocolate
cake
for
little
Kevin’s
__________
birthday.(six)3.
We
still
need
__________
more
chairs
for
the
meeting
room．(ninth)4.
Eric,
the
__________
son
of
the
family,
has
a
special
interest
in
physics.(
three)5.
Alex
is
__________
years
old
and
is
taken
good
care
of
in
the
kindergarten.(fourth)6.Climb
up
to
the
__________
floor,
and
you
can
enjoy
a
better
view.(
eleven)7.
Children
go
to
________
school
after
they
leave
elementary
school.
(second)
8.
The
students
took
the
PISA
test
in
__________
subjects—reading,
maths
and
science.(third)9.
This
is
the
__________
time
for
our
school
to
hold
the
robot-making
contest.(six)10
The
medicine
should
be
taken
__________
a
day
after
meals,
George.(two)Keys:
I.
1-5
ACCDC
6-10
BDADD
11-15
ACDBAII.
1.
tenth
2.
sixth
3.
nine
4.
third
5.
four
6.
eleventh
7.
secondary
8.
three
9.
sixth
10.
twice
Grammar--Numeral