专题03 数词和冠词
知识点讲解
数词
基数词:表示数目,如one,two,three等
数词(表示数目和顺序的词)
序数词:表示数目的顺序,如first,second,third等
(一)基数词(表示数目的多少)
1.基数词的基本构成
(1)基数词1-12是独立单词,需逐个记忆;
(2)基数词13-19是在个位数词的后面加-teen构成,其中thirteen,fifteen,eighteen的变化不规则;
(3)基数词20-90的整十数是在十位数词后面加-ty构成(其中twenty,thirty,forty,fifty的变化不规则),
基数词21-99的非整十数是在十位数词后面加上个位数词构成,中间加连字符“-”。 e.g. 61 → sixty-one
2.基数词的基本用法及注意点
数量单位的使用
具体数字/ several/some/many + hundred / thousand / million / billion / score(单数形式)
hundreds / thousands / millions / billions/ scores(复数形式)+ of
e.g. three hundred people thousands of people
时刻表达法
①整点钟通常用基数词表示 e.g. 12:00—twelve (o'clock) 5:00—five (o'clock)
②表达“几点过几分”或“几点差几分”
A. 只需用基数词,先说钟点,后说分钟 e.g. 8:42—eight forty-two 2:13—two thirteen
B. 用基数词加介词,先说分钟,后说钟点
分钟数≤30,介词用past,意为“几点过几分” e.g. 3:25—twenty-five past three
分钟数>30,介词用to,意为“几点差几分” e.g. 5:50—ten to six
“基数词-单数n.” → 复合adj.(作n.的定语,用于表时间,距离等)
e.g. a 100-meter race a ten-minute walk (= ten minutes' walk)
“基数词-单数n.-adj.” → 作定语 e.g. a 12-year-old boy
“the + 整十数字的复数形式” → 表时间年代 e.g. in the 1980s(在20世纪80年代)
“one's + 整十数字的复数形式” → 表“在某人…岁时” e.g. in his seventies
“another + 基数词” = “基数词 + more”
e.g. I need another two chairs. = I need two more chairs.
(二)序数词(表示顺序次第)
从第一到第十九的序数词除第一first,第二second,第三third,第五fifth,第八eighth,第九ninth,第十二twelfth的变化不规则外,其余均在基数词后加上-th
e.g. sixteen (16) → sixteenth (第16)
整十数字的序数词的构成方法是将整十数字词尾的y变成i再加-eth
e.g. twenty → twentieth thirty → thirtieth
几十几的序数词,只是把个位数变成序数词,十位数不变
e.g. twenty-one → twenty-first seventy-five → seventy-fifth
基数词变序数词助记歌
基变序,有规律,末尾加上th;一、二、三特殊记,八加h,九去e,ve要用f替;
以y结尾变ie,后跟th莫忘记;若想表示几十几,只变个位就可以。
(三)易错知识点
1. 序数词前要加the(若序数词前已有指示代词、物主代词或every时,不用定冠词the);基数词前不加冠词
e.g. Monday is the first day of a week. / This is my first trip to Hong Kong.
She has two sisters.
2. a / an + 序数词,表“又一,再一”
e.g. He failed twice, but he tried a third time.
3. 年、月、日表达法:年份用基数词,日期用序数词
e.g. 1988年5月1日 → May 1st, 1988 (读作:May the first, nineteen eighty-eight)
4. 编号的表达
名词+基数词 e.g. Lesson One; Room 302
the+序数词+名词 e.g. the tenth lesson; the second line
(年级班级的表达: Class 1,Grade 3; 章节的表达:Chapter 2或the second chapter)
5. 分数表达法:分子用基数词,分母用序数词;分子>1时,分母要用复数
e.g. 1/5 → one fifth; 2/3 → two thirds
6. 次数的表达
once (一次); twice (两次);
三次或以上:基数词+times e.g. five times (五次)
冠词:放在名词前,说明名词所表示的人或事物,不能离开n.而单独存在。
冠词(两种):不定冠词 a/an;定冠词the
(一)不定冠词a/an (用于可数n.单数前)
1. a/an的区别
a用在以辅音音素开头的单词前,an用在以元音音素开头的单词前 (不看字母看发音)
e.g. a book / a pen an apple / an orange
注意:a useful book; a university; a one-month holiday; a European country;
an honest boy; an hour; an eight-year-old boy
There is a "b" in the word "boy". There is an "f" in the word "four".
(在26个字母中,前面用an的字母有“a, e, f, h, i, l, m, n, o, r, s, x”,其他用a)
2. 基本用法
在叙述时用于第一次提到的某人或某物前
e.g. This is a book.
泛指人或事物的某一类别,以区别于其它种类
e.g. A plane is a machine that can fly.
泛指某人或某物
e.g. A girl is waiting for you.
用于表示时间、速度、价格等意义的n.前,有“每一”的意思,相当于every
e.g. five lessons a week
用于可视为一体的两个名词前
e.g. a knife and fork
用于某些固定词组中
e.g. have a walk / talk / look / drink / rest / cold; have a good time; in a hurry; do sb. a favor
(二)定冠词the (用于可数n.单、复数及不可数n.前)
1. 基本用法
特指双熟悉 (特指某人或某物 / 谈话双方都知道的人或物)
e.g. The young man beside Lily is a doctor. Give me the book, please.
上文已提及 (上文已经提到的人或事物)
e.g. I have a book. The book is very interesting.
世上独无二 (指世界上独一无二的事物)
e.g. The earth moves around the sun.
序数形最高 (用在序数词、形容词最高级前,以及起特指作用的比较级前)
e.g. The first lesson is very easy. He is the tallest student in his class.
He is the taller of the two boys.
普通专有名 (用在由普通n.构成的专有n.前)
e.g. the Great Wall; the United States; the Summer Palace
姓氏加乐器 (用在姓氏复数形式前,表“一家人”或“夫妻俩”;用在西洋乐器名称前)
e.g. The Greens are watching TV now. She is playing the piano now.
方位一类人 (用在方位名词前;用在某些形容词前,表示某一类人)
e.g. Hainan is in the south of China. The rich should help the poor.
用在某些固定词组中
e.g. in the morning / afternoon / evening; in the end; at the same time; by the way; at the moment;
in the middle of; at the age of…
注意事项
1. 表倍数、分数的词+ the + n. e.g. The bed is three times the size of that one.
2. 句型:v. + sb. + 介词 + the + 身体部位 e.g. hit sb. on the head; hit sb. in the face
3.“the + 序数词”表“第几.......”; “a + 序数词”表“又一,再一”
e.g. The first lesson is easy. The cake is delicious, and I would like a second one.
4. a number of + n. +复数形式谓语v. (意为“许多”,= many)
the number of + n.+单数形式谓语v. (意为“........的数量”)
e.g. A number of students like playing computer games.
The number of the students is about 2000 in our school.
(四)零冠词 (即不使用冠词)
基本用法
某些专有n.,如人名、地名、国名、物质n.、抽象n.表泛指时,前面用零冠词
e.g. China is a great country. Money is not the key to happiness.
指示代词/物主代词/不定代词/名词所有格 + 零冠词+ n.
e.g. Every student likes English in our class. This is my book.
用在表节日、日期、星期、月份、季节等的词前,但若特指某年的某月份或某年的某季节,则需在月份、季节前加the
e.g. June 1st is Children's Day. Spring comes after winter.
The winter in 2008 was very cold.
用在称呼或表示头衔的n.前
e.g. What's wrong, Lily This is Professor Li.
用在三餐、球类及学科名词前
e.g. They are having lunch now. He often plays football after school.
Lily likes English very much.
注意:如果三餐前有adj.修饰,则要用冠词 e.g. After a quick breakfast, he went to school.
用在与by连用的交通工具名称前
e.g. I usually go to school by bus. (但take a bus, in a boat, on the bike 中需用冠词)
用在“专有n. + 普通n.”构成的表街名、路名、山名等的n.前
e.g. Nanjing Road; Hainan Island
用在某些固定词组或习惯用语中
e.g. face to face; step by step; at school / work / home; at first / last; in trouble / danger / bed;
by bus / bike / train; on foot; at noon / night; go to school / work
(五)注意事项
1. 定冠词、不定冠词和零冠词都可与n.连用,表一类事物。
a / an +可数n.单数 e.g. A horse is a useful animal.
the + n.单数 e.g. The horse is a useful animal.
零冠词 + 可数n.复数或不可数n. e.g. Horses are useful animals. / Water is valuable to us.
2. 有定冠词与无定冠词的区别
go to school 上学 (是学生) go to the school 到学校去 (不一定是学生)
in hospital 因病住院 in the hospital 在医院里 (不一定是病人)
at table 吃饭 at the table 在桌子旁边
at school 在上学 at the school 在学校里
in front of 在(...外部的)前面 in the front of 在(...内部的)前面
by sea 乘船 by the sea 在海边
in bed (睡、病、躺)在床上 in the bed (某物)在床上
例题精炼
一、单项选择
1.The world’s population will be about 8.5 ________ in 2030.
A.hundred B.hundreds of C.billion D.billions of
2.How to read the number 431,729 in English
A.Four hundred thirty-one thousand, seven hundred twenty-nine.
B.Four hundred thirty-one thousand and seven hundred twenty-nine.
C.Four hundred and thirty-one thousand, seven hundred and twenty-nine.
3.—I want to make a banana milk shake. What do I need
—You need ________ bananas and ________ milk.
A.two; some B.two; many C.a little; many
4.— How many new words are there in _________ lesson
— There are only _________.
A.the twenty-first; the ninth B.the twenty-first; nine
C.twenty-one; nine D.twenty-one; the ninth
5.5:15 in English is ________.
A.a quarter to five B.a quarter five C.fifteen five D.a quarter past five
6.—What’s the time
—________.
A.It’s half past seven B.It’s at seven thirty C.It’s seven past thirty D.It’s at half past thirty
7.Boys and girls, please turn to Page ________ and look at the ________ picture.
A.Twelve; fifth B.Twelfth; fifth
C.Twelve; five D.Twelfth; five
8.Boys and girls, please turn to Page ________ and look at the ________ picture in Unit 4.
A.Twentieth; four B.Twenty; fourth C.Twentieth; fourth D.Twenty; four
9.—What do you know about the cartoon
—Well, it became very popular in Western countries _________.
A.in 1990s B.in the 1990s C.in the 1990
10.________, a British scientist invented the steam engine.
A.In the 1760’s B.on the 1760 C.In 1760’s D.In the 1760th
11.My grandpa is nearly ________ years old.We will celebrate his ________ birthday next month.
A.seventy; seventy B.seventy; seventieth
C.seventieth; seventy D.seventieth; seventieth
12.17.17 can be read ______.
A.one seven point one seven B.seventeen point seventeen
C.seventeen point one seven D.one seven point seventeen
13.—How wide is the Golden Gate Bridge
—It’s ________.
A.90 feet wide B.90-feet-wide C.90 foot wide
14.—When did he come to America
—He has been here for________.
A.one and a half year B.one year and a half C.one and half a years D.one year and a half year.
15.—What do you do to make our city greener
—Oh, we plant ________ trees every spring.
A.hundred B.hundreds of C.hundreds D.hundred of
16.________ of our classmates are good at playing baseball.
A.Two fifths B.Two fifth C.Second fifth
17.In the early ________ century, the first trains began to carry passengers.
A.nineteenth B.nineteen C.nineth D.nine
18.Soon Ben met another problem. So, he went to ________ expert for ________ advice.
A.an; the B.a; / C.an; / D.a; a
19.I’m going to study math at ________ university because I want to be ________ engineer when I grow up.
A.a; an B./; a C.an; an
20.Today many young people in China are interested in city walks when they visit ________ new city.
A.a B.an C.the D./
21.—Did you see ________ film The Wandering Earth last weekend
—Yes, it’s ________ exciting film!
A.a; the B.the; an C.a; an D.the; the
22.—What do you think of ______ film Transformers
—Wonderful! I’d like to watch it again.
A.a B.an C.the
23.—Do you know ________ women’s champion (冠军) over there
—Yes. She is Yang Wenlu, coming from Shangdong, Juye.
A.a B.an C.the D.不填
24.I usually have ________ lunch with my classmates at school.
A.a B.the C./
25.My good friend can play ________ basketball, but she can’t play ________ violin.
A./, the B.the, the C.the, /
26.—Who is ________ girl in a pink hat
—She is my sister and she often plays ________ chess with me.
A.a; an B.the; the C.the; /
二、完成句子
27.假如他们今天举行晚会,班上有一半人将不会来。
If they have the party today, won’t come.
28.我去过北京两次。
I have to Beijing .
29.后天将是李平的12岁生日。
It will be Li Ping’s birthday .
30.我们班有五分之四的学生来自白银。
of the students in our class come from Baiyin.
31.老师说第一个步骤是刻苦学习。
The teacher says the is to work hard.
32.草海是一个多么美丽的湖泊啊!我们应该保护好它。
beautiful lake Caohai is! We should protect it well.
33.我们不希望和这么优秀的一个队竞争。
We don’t hope to such excellent .
34.请把这个苹果切成两半。(in half)
Please .
35.老师讲的这个故事多有趣啊!
interesting story our teacher told us!
36.你喜欢玩电子游戏吗?
Do you like playing
37.我们什么时候能驾驶火箭飞往月球?
When will we the moon
三、单词拼写
38.Only fifty p of our students exercise every day.
39.My uncle lives in a town (十四) kilometers away from Yangzhou.
40.Tomorrow is my sister’s birthday. We will have a party at home. (twelve)
41.Next years she is going to celebrate her t (第二十) birthday.
42.The (第三) Sunday in June is Father’s Day.
43.My brother wants to be actor because he loves acting very much.
44.I want to be pianist when I grow up.
45.The (rich) are not always happy.
46.The rich should help the .
47.Andy likes playing (棒球) best.
48.Andy is able to make . (奶昔)
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参考答案:
1.C
2.C
3.A
4.B
5.D
6.A
7.A
8.B
9.B
10.A
11.B
12.C
13.A
14.B
15.B
16.A
17.A
18.C
19.A
20.A
21.B
22.C
23.C
24.C
25.A
26.C
27. half the class
28. been twice
29. twelfth the day after tomorrow
30. Four fifths
31. first step
32. What a
33. compete with/against an team
34.cut the apple in half
35. How the
36.video games
37. fly rockets to
38.(p)ercent
39.fourteen
40.twelfth
41.(t)wentieth
42.third
43.an
44.a
45.rich
46.poor
47.baseball
48.milk shakes
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