2021中考英语二轮复习语法专题精讲精练4.数词（32张PPT）

专题四　数　词
2021中考英语二轮复习 语法专题突破 精讲精练
考点1 基数词与序数词
{5940675A-B579-460E-94D1-54222C63F5DA}基数词与序数词的转换
one—first
ten—tenth
nineteen—nineteenth
two—second
eleven—eleventh
twenty—twentieth
three—third
twelve—twelfth
forty—fortieth
four—fourth
thirteen—thirteenth
fifty—fiftieth
five—fifth
fourteen—fourteenth
sixty—sixtieth
six—sixth
fifteen—fifteenth
seventy—seventieth
seven—seventh
sixteen—sixteenth
eighty—eightieth
eight—eighth
seventeen—seventeenth
ninety—ninetieth
nine—ninth
eighteen—eighteenth
a hundred—hundredth
1.基数词的用法
{5940675A-B579-460E-94D1-54222C63F5DA}情形
用法
示例
表示
年龄
①基数词(＋years old)
②at the age of＋基数词
My daughter is sixteen (years old)．＝My daughter is at the age of sixteen.
表示年、月、日；某人的岁数或年代
表示在某月用in，表示在某日用on
in October 1949；on October 1(st)，1949
表示“在某人几十多岁时”用“in one's＋几十的复数形式”
She began to learn English in her forties.
表示“……世纪……年代”：in＋the＋表示年份的阿拉伯数字加?s或?'s
Many soldiers of this army were born in the 1980s.
{5940675A-B579-460E-94D1-54222C63F5DA}情形
用法
示例
表示时间、距离等
使用含数词的名词所有格形式作定语
three days' leave；ten minutes' walk
表示长、宽、高、面积等
基数词＋单位词＋形容词＝基数词＋单位词＋in＋名词
five meters high＝five meters in height
倍数的表达法
三倍及以上，用“基数词＋times”表达
four times
百分数、小数的读法
百分数：先读基数词，再读百分号
3%(three percent)；65%(sixty?five percent)
小数：小数点前面按照基数词读，小数点后面的数字逐个读出
78.98(seventy?eightpoint nine eight)
【拓展】(1)“基数词＋名词＋形容词”合成的复合形容词中，其中的名词用单数。如：
a 10?meter?long bridge一座十米长的桥
(2)数词与表示时间、距离、重量、金钱、度量等词连用作主语时，常被看作是一个整体，谓语用单三形式。如：
Twenty years is quite a long time.20年真的是很长的一段时间。
(3)another＋基数词＋名词复数＝基数词＋more＋名词复数。如
another two chairs＝two more chairs另外两把椅子
(4)表示年级、班级、房间号和编号。由“单数名词＋基数词”构成，此时名词和基数词的第一个字母需大写。如：
Grade Nine九年级
2.序数词的用法
(1)序数词前必须加the。如：
The second is what I really need.第二个是我真正需要的。
(2)序数词前若有限定词，则可以不用加the。如：
It is my third time to visit Beijing.这是我第三次游览北京。
(3)序数词前面也可以加不定冠词a或an，表示“又一；再”，内含顺序性。如：
We've tried it three times.Must we try it a fourth time？我们已经试过三遍了，还必须试一次(第四次)吗？
【典例剖析】
(2020·滨州)—I like the number “9” best，because I think it stands for “long lasting”.
—Me too.So I choose ________ floor to live on.
A.nine　　　　　　 B.ninth
C.the nine D.the ninth
剖析：句意：——我最喜欢数字“9”，因为我觉得它代表“长久”。——我也是，所以我选择住在________楼。nine九；ninth第九；the nine搭配不当；the ninth第九。ninth是序数词，表示顺序时应加定冠词the，根据句中floor可知，此处应使用the ninth，the ninth floor表示“(第)九楼”。故选D。
【对点演练】
(　　)1.(2020·重庆B卷)Teachers' Day is in September，the ________ month of the year.
A.nine B.ninth C.ten D.tenth
(　　)2.(2020·丹东)The words from Page 1 to Page 3 are very clear.But the ones on the ________ page are not.
A.first B.two C.three D.fourth
B
D
(　　)3.(2020·遂宁)They worked for________ days，and finished the________ task successfully.
A.twelve；two B.twelve；second
C.twelfth；two D.twelfth；second
4.(2020·安顺)China is the ________(three) nation that sent a person into space.
5.(2020·临沂)After the Great Wall Station，Zhongshan，Kunlun and Taishan，China is now building its________(five) research station in Antarctica(南极洲).
B
third
fifth
考点2 概数词
(1)hundred，thousand，million等与具体的数字one，two…或several，some，many连用时，要用单数形式。如：
five hundred people 五百人
two thousand books 两千本书
many million trees 几百万棵树
(2)hundred，thousand，million等与of连用时，要用复数形式，但前面不能再加数字。如：
thousands of factories 成千上万家工厂
注意：若表示一定范围内的具体多少数目则要加of＋特定范围，其中这些概数词用单数。如：
two hundred of the students 这些学生中的两百人
【典例剖析】
(2020·益阳)We all know that ________ birds fly to Dongting Lake in winter.
A.million　　　 B.millions　　 　C.millions of
剖析：句意：我们都知道冬天有________鸟飞到洞庭湖。million百万。当million前有具体基数词时，million用原形；millions of短语表示“数以百万计的”，此时million前不能用具体基数词修饰。根据题干可知空前没有基数词，此处用millions of。故选C。
【对点演练】
(　　)6.Two ________ students in our school are from the countryside.
A.hundred of B.hundreds of
C.hundred D.hundreds
7.(2019·安徽改编)The six?year?old American girl has learned ________(hundred) of Chinese poems.
8.(2019·海南)The little girl kissed her father and said，“Dad，I love you three ____________(千) time.”
C
hundreds
thousand
考点3 分数
(1)分子用基数词，分母用序数词。分子为1，分母用单数；分子大于1，分母用复数。如：
one fifth，three fifths
一些习惯用法：1/4也可表示为a quarter，3/4也可表示为three quarters，1/2也可表示为a half。
(2)带分数的词组作句子的主语时，谓语动词的单复数与分数后的名词保持一致。如：
Two fifths of the apple is eaten.这苹果被吃了五分之二。
Two fifths of the apples are red.五分之二的苹果是红色的。
【典例剖析】
(2020·广元)There are fifty students in this class.________ of them are boys，so the number of the boys is 30.
A.Three fifth　 B.Three fifths　 C.Three five
剖析：句意：班上有50名学生。________是男生，因此男生的数量是30
人。分数是由基数词和序数词一起来表示的。基数词作分子，分子是three；序数词作分母，除了分子是1的情况外，其他情况下序数词都要用复数形式，此处分母用序数词的复数形式fifths。故选B。
【对点演练】
(　　)9.(2020·黔东南)—Dear，how is your homework going?
—Oh，Mom，I've just finished ________of it.
A.second three B.two third
C.second threes D.two thirds
(　　)10.(2020·绥化)About ________ of the students don't like studying online in my class，because they can't discuss with their classmates.
A.one three B.one thirds
C.one third
D
C
(　　)11.(2019·安顺)Nowadays，________ people like HUAWEI phones better，and about ________ of them are adults.
A.the number of；four?fifths
B.a number of；four?fifth
C.a number of；four?fifths
D.the number of；four?five
C
(　　)1.(2020·黄石)There are about eight hundred students in the school.
________of them are boys.
A.Three fifth B.Third fifth
C.Third five D.Three fifths
(　　)2.(2020·黄石4月中考模拟)—Nowadays China has about 25，000 kilometers of high?speed railways.
—That's________ of the world's total.
A.two third B.two?third
C.two thirds D.two three
D
C
(　　)3.(2020·黄石九年级6月模拟)—How old is your younger brother，Tom?
—________.And we had a birthday party for his ________ birthday last week.
A.Ninth；nine B.Nine；nine
C.Nine；ninth D.Ninth；ninth
C
(　　)4.(2020·大冶市九年级6月调研)________ of the students in our class ________ going to the summer camp in Beijing next week.
A.Two fifths；is
B.Two fifths；are
C.Second fifths；is
D.Second fifths；are
B
(　　)5.(2020·黄石十四中教育集团九年级6月月考)—How many students will join the school trip in your class?
—________ of them.
A.Two three B.Second three
C.Two third D.Two thirds
(　　)6.(2020·尹家湖中学中考一模)It is said that ________ of the water around world ________ polluted.
A.two thirds；has B.two thirds；is
C.two third；are D.two thirds；have
D
B
专题精练
Ⅰ.单项选择
(　　)1.(2020·鄂州)Because of the special situation this year，about ________ of the students in our school ________ having classes on the Internet at home.
A.two thirds；are B.two third；is
C.second thirds；are D.two thirds；is
(　　)2.(2020·天水)My grandparents live in an old apartment with ________ floors and they are on the ________ floor.
A.five；five B.five；fifth
C.fifth；fifth D.fifth；five
A
B
(　　)3.(2020·龙东)My son is ________ years old.Today is his ________ birthday.
A.twelve；twelve B.twelve；twelfth
C.twelfth；twelve
(　　)4.(2020·齐齐哈尔)The apartment has ________floors and Mr.Black lives on the ________floor with his family.
A.twelve；twelve B.twelve；twelfth
C.twelfth；twelfth
B
B
(　　)5.(2019·郴州)Every year，________books are given away to the poor children in the countryside.
A.thousand B.thousands of
C.thousand of
(　　)6.(2019·鄂州)Our country is nearly ________ years old.We'll celebrate its ________ birthday on October 1，2019 around the country.
A.seventy；seventy
B.seventy；seventieth
C.seventieth；seventy
D.seventieth；seventieth
B
B
(　　)7.(2019·凉山)There are ________ people in Dale's family.They live on the ________ floor.
A.five；nine B.fifth；nine
C.five；ninth D.fifth；ninth
C
Ⅱ.根据句意及所给提示，填写正确的单词。
8.(2019·苏州)He seems to have a ________(第六)sense for knowing that his brother will win.
9.Guilin attracts __________(千) of tourists all over the world every year.
10.We'll have a party next Saturday for Lily's ________(第二十) birthday.
11.October is the ________(ten) month of a year.
12.It's the ________(four) time that I have visited the city of Suizhou.
13.It will be Helen's ________(nine) birthday next Monday.
sixth
thousands
twentieth
tenth
fourth
ninth
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