4. Composition and usage of1cardinal words
(1) The most basic cardinal words are shown in the following table:
(2) the writing of cardinal words
① The two digits are 2 1 ~ 99, and the decimal digits are separated from the unit digits by a hyphen "-". Example:
◇ 2 1 21 ◇ 32 32
◇ 98 ◇9990-nin
e
② For the three digits of 10 1 ~ 999, the conjunction and is used between the digits of the 100th and below, and the digits of the hundredth and thousands are singular.
◇ 10 1 one hundred
◇ 225 225
999 999
(3) Numbers above1000, counted from the back to the front, every three intermediate points ",",the "before the first one is thought, the first one.
The first two are millions, and the first three are millions. Example:
◇ 2,567 2,566
even
◇30 18 Three thousand people
(3) Usage of basic words
(1) as the subject. Example:
Ten is a very important number.
Ten is a very important number.
◇ Two plus three equals five.
Two plus three equals five.
(2) As an attribute. Example:
◇ One kilometer equals two li.
1 km equals 2 Li.
She has three brothers.
She has three brothers.
(3) as an object. Example:
I wanted three, but he gave me five.
I wanted three, but he gave me five.
I get up before six every day.
I get up before six o'clock every day.
(4) as a predicative. Example:
◇— What time is it? What time is it now?
It's ten o'clock. At o'clock.
(4) Difficulties
Happy, thinking and million are generally used in the singular form of compound numerals, but they are used to express uncertainty.
Number, used in plural form. Example:
Hundreds of workers will continue to strike.
Thousands of people are swimming in the river.
At this time, the words "Happy" and "How" are not preceded by numerals, and their plural forms are usually used with "of".
4.2 Composition and usage of ordinal numbers
Synthesis of (1) ordinal number
① Generally speaking, it consists of corresponding cardinal words and suffix th. Example:
◇ Four+th → Fourth ◇ Six+th → Sixth
◇ Seven+th → Seventh ◇ Ten+th → Tenth
② The following cardinal words have special changes when they become ordinal numbers. Example:
◇ One → First◇ Two → Second◇ Three
E → Third
◇ Five → Five → Eight → Eight → Nine
→ Ninth
◇ Twelve → Twelve
(3) Ten integer ordinal numbers are formed by replacing the Y word of the cardinal word with I and adding eth. Example:
◇ Twenty → Twenty → Thirty → Thirty
h
◇ Forty → Forty → Ninety → Nine
Tis
(4) Two or more cardinal numbers are ordinal, and only single digits are ordinal. Example:
◇ 21 → 21
◇ 35 → 35
◇ 153 → 105
The fifty-third session
(2) the usage of ordinal number
(1) ordinal numbers in use, generally used with the definite article. Example:
◇ the first book ◇ the second floor
The third day the fourth week.
(2) Ordinal numbers are used as attributes in most cases, and some can also be used as predicative, subject and object. Example:
May 1 day is labor day.
May 1st is Labor Day.
My room is on the second floor.
My room is on the second floor.
The first one is bigger than the second one. (theme)
The first one is bigger than the second one.
Read the book from the beginning. (object)
Read the book from the beginning.
You will be the sixth person to write a letter. (predicative)
You will be the sixth person to write it.
(3) An indefinite article can be added before the ordinal number to indicate the meaning of "another" and "another". Example:
You may have a third try.
You can try it a third time.
(3) time characterization
(1) Time is expressed by cardinal words. Example:
It's nine.
It's nine o'clock.
It's not five o'clock yet.
It's not five o'clock yet.
Sometimes an o point is added after it, but it is generally omitted in spoken English.
(2) There are two representations of time and minutes.
A. Reverse reading method: Different from Chinese, read "fen" first and then "fen". Within 30 minutes, use "Minutes+Past+"
"Hours" means "how many minutes have passed", and if it exceeds 30 minutes, it means "minutes+to+the next hour".
What time is it now? You can also use a quarter, 30 for 15 minutes, and half for 30 minutes. Example:
◇ 2: 15 2: 15
It's a quarter to three at two forty-five.
◇ 1:55 five to two
◇ Seven point zero five.
◇ 5:35 5: 35
9: 30 9: 30
Use 0 o'clock only when it refers to the exact time, such as teno'clock, but you can't say it's past 7 o'clock.
Ten o'clock.
B sequential reading method: the same as Chinese, two cardinal words are used together, the first one means "point" and the second one means "point". Example:
◇ 5: 45: 40
◇ 2:30 2: 30
◇ 1: 15 a fifteen
At this time, 15 and 30 cannot be replaced by aquater and ahalf.
(4) date symbol
(1) year reading method: use cardinal words and read them in two places. Example:
◇ 1949 nineteen forty-nine
◇ 1840 18: 40
② The name of the month should be capitalized. Example:
◇ January◇ February◇ March◇ April
(3) The date is expressed in ordinal numbers, which can be added or omitted. Example:
May 4th Movement (4th)
◇ 10 October 1 October (the first)
(4) the order of year, month and day: in English, it is read in the order of year, month and day.
◇ 1949 10 October 1 October October (below) 940 -n
Internet project memorandum
◇ 1999 May 1 May (the) in the 1909 th year.
In a certain year and month, the preposition in, such as in2000 and in September, means "on a certain day"
Use the preposition on, as on July 8.
(5) Digital reading
(1) means "which lesson (department, chapter or section)". When using ordinal numbers, be sure to add an article in front; When using cardinal words, you don't use articles, but
Word order is the opposite of Chinese.
Lesson 1 → Lesson 1
The third part → the third part
(2) When the number is long, cardinal words are usually used. Example:
◇ Page 2 19 (219)
◇ Room 306 (three o [? Chenopodium album (6)
No.6 bus
◇ Telephone number 8853 16 Telephone number 8853 16 (88
5316)
(6) The usage of multiples
The train arrived half an hour late.
The train arrived half an hour late.
Half are adjectives.
His books are three times as many as mine.
His books are three times as many as mine.
The expression "several times of ~" has been used twice. Pay attention to the position of the word representing multiple in the sentence.