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新人教版（2024）七年级上册英语语法SU3 Welcome!
语法基础
一、基数词
定义：基数词用于表示数量或数目多少。
构成：
1-12：直接记忆，如one, two, three, ... twelve。
13-19：在3-9的基数词后加-teen，但需注意13（thirteen）、15（fifteen）、18（eighteen）的拼写。
20-90：逢十的基数词：在2-9的基数词后加-ty，如twenty, thirty, forty等。
21-29：由twenty加1-9的基数词构成，中间用连字符，如twenty-one, twenty-two等。
100以上：
百位数：由1-9加hundred构成，如two hundred。
千位数：由1-9加thousand构成，如three thousand。
更大的数：
每三位数用逗号隔开，分别用thousand, million, billion等表示，如six million two hundred and sixty thousand three hundred and nine。
用法：
表示数量：如How many books would you like I would like two.
表示号码：如My phone number is 6887789.
表示时间：如I watch CCTV News at seven o'clock every evening.
表示年龄或年代：如He is in his early thirties. 或This took place in the 1930s.
与hundred, thousand, million等连用：
具体数目时，用单数形式，如There are six hundred students in our grade.
不确定数目时，用复数形式加of，如Hundreds of old people died of cold last winter.
二、序数词
定义：序数词用于表示顺序或次序。
构成：
1-3：first, second, third，为独立单词。
4-19：在基数词后加-th，但需注意fifth, eighth, ninth, twelfth的拼写。
20以上：
逢十的序数词：将基数词的词尾-ty变为-ti再加eth，如twentieth, thirtieth等。
两位数或以上的序数词：十位数用基数词，个位数用序数词，如twenty-first, thirty-fourth等。
用法：
表示顺序：如The sixth man went forward to feel the elephant.
与定冠词the连用：表示顺序时，序数词前通常要加定冠词the，如You are the second and I am the fourth.
与不定冠词a/an连用：表示“又一、再一”的意思，如Can you do it a third time
缩写形式：由阿拉伯数字加上序数词的最后两个字母构成，如first→1st，second→2nd等。
语法实践
单项选择。
How many books are there on the desk
A. First B. Second C. Five D. Five's
This is my _____ birthday.
A. one B. first C. ones D. the first
She finished the race in _____ place.
A. three B. third C. thirdly D. threes
The train leaves at _____ past seven.
A. twenty B. twentieth C. twenty's D. twentieths
There are _____ days in a week.
A. seven B. seventh C. sevens D. the seven
He has _____ brothers and no sisters.
A. two B. second C. two's D. the two
This is the _____ largest city in the country.
A. two B. second C. secondly D. twoth
I need _____ more apples to make a pie.
A. three B. third C. threes D. the three
Today is the _____ day of January.
A. one B. first C. ones D. first's
The _____ month of the year is August.
A. eight B. eighth C. eight's D. eighteth
She lives on the _____ floor of the building.
A. five B. fifth C. fiveth D. fifths
He is the _____ runner in the race.
A. one B. first C. ones D. first runner
I have _____ apple and _____ orange.
A. a, an B. one, one C. one, an D. a, one
This is the _____ time I've visited this city.
A. two B. second C. second time D. two times
_____ of the students in our class like math.
A. Most B. The most C. Many D. The many
She won the _____ prize in the competition.
A. one B. first C. ones D. the first
There are _____ hundred students in this school.
A. Five B. Fifth C. Fives D. The five
Today is the _____ day of the week.
A. seven B. seventh C. seven's D. sevenths
_____ of the apples are ripe.
A. All B. Whole C. The whole D. Whole the
She is the _____ student to arrive at school today.
one B. first C. ones D. the first
The Olympic Games are held every _____ years.
A. four B. fourth C. fours D. the four
Today is June _____, the middle of the month.
A. fifteen B. fifteenth C. fifteen's D. the fifteenth
The movie is _____ hours long.
A. three B. third C. threes D. the three
She was the _____ person to arrive at the party.
A. one B. first C. ones D. the first
My apartment is on the _____ floor of the building.
A. eight B. eighth C. eight's D. eighteth
_____ of the students in our class are from foreign countries.
A. Half B. The half C. Halves D. Half's
I need _____ more books to complete my collection.
A. ten B. tenth C. tens D. the ten
This is the _____ time I've seen such a beautiful sunset.
A. two B. second C. secondly D. the second
There are _____ days in a leap year.
A. three hundred sixty-five B. three hundred and sixty-five
C. three hundred and sixty-fifth D. the three hundred sixty-fifth
She was born in the _____ century.
A. twenty B. twentieth C. twenties D. the twentieth
The _____ day of the week is Sunday.
A. seven B. seventh C. seven's D. sevenths
How many _____ are there in a dozen
A. twelve B. twelfth C. twelves D. The twelve
He finished the race in _____ place, ahead of everyone.
A. first B. one C. ones D. the first
I have _____ apples, would you like one
A. three B. third C. three's D. the three
The _____ chapter of the book discusses the main theme.
A. five B. fifth C. fives D. fiveth
My birthday is on the _____ of October.
A. two B. second C. twentieth D. twenty
The price of this book is _____ yuan.
A. fifty B. fiftieth C. fifty's D. fiftieths
There are _____ students in our class.
A. forty-five B. forty-fiveth C. forty and five D. forty-five's
My father is _____ years old this year.
A. thirty-six B. thirty-sixth C. thirty and six D. thirty-six's
The movie lasts for _____ minutes.
A. one hundred and twenty B. one hundred and twenties
C. one hundreds and twenty D. one hundred and twenty's
What is the _____ day of the week ——Monday.
A. one B. first C. second D. three
My birthday is on the _____ of April.
A. twenty B. twentieth C. twentieths D. two-tieth
Which is the _____ floor of the building
A. five B. fifth C. fifths D. fiveth
The _____ month of the year is February.
A. two B. second C. twoth D. two's
This is my _____ time to visit the Great Wall.
A. one B. first C. ones D. firsts
The _____ lesson of the day is math.
A. three B. third C. threeth D. three's
Which is the _____ largest country in the world
A. three B. third C. threeth D. three
The _____ question on the test was the hardest.
A. ten B. tenth C. tenthly D. ten's
The _____ Olympic Games were held in Beijing.
A. twenty-eight B. twenty-eighth C. twenty-eight's D. twenty-eighteth
She finished the race in the _____ place.
two B. second C. two's D. seconds
参考答案
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