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來源：網絡來源 作者：中考網整合 2021-10-17 19:38:23
(6) 在某些固定詞組里，名詞之前常不用冠詞。例如：
By air, at night, at home, go to bed, go to school, on foot, from morning till night 等。
二. 數詞的用法
數詞分基數詞和序數詞。基數詞表示數目，序數詞表示順序。
1. 基數詞的用法
(1) 基數詞在句中主要用作主語、賓語、定語、表語、同位語，例如：
Thirty of them are Party members.(主語)
--- How many would you like?
--- Three ，please.(作賓語)
The nine boys are from Tianjing.(定語)
Six plus four is ten.(表語)
We four will go with you.(同位語)
(2) 表示一個具體數字時，hundred, thousand, million一律不用復數;在表示一個不確定數字時則用復數。例如：
Our country has a population of 1,300 million people.
There are three thousand students in our school.
After the war, thousands of people became homeless.
Maize is the most important food crop for millions of people in the world.
They arrived in twos and threes.
(3) 表示“……十”的數詞的復數形式可用來表示人的歲數或年代，例如：
He is in his early thirties.
He died still in his forties.
This took place in 1930s.
(4) 表示時刻用基數詞。例如：
We get up at six.
The workers begin work at eight.
表示“幾點過幾分”，用介詞past,但須在半小時以內。例如：
ten past ten,
a quarter past nine,
half past twelve
表示“幾點差幾分”用介詞to, 但分數須在半小時以上。例如：
twenty to nine,
five to eight,
a quarter to ten
表示“幾點幾分”還可直接用基數詞。例如：
seven fifteen,
eleven thirty,
nine twenty
2. 序數詞的用法
(1)序數詞主要用作定語，前面要加定冠詞，例如：
The first truck is carrying a foot baskets.
John lives on the fifteenth floor.
(2)序數詞有時前面可加不定冠詞來表示“再一”，“又一”這樣的意思，例如：
We'll have to do it a second time.
Shall I ask him a third time?
When I sat down，a fourth man rose to speak.
(3)由幾個序數詞和基數詞在拼寫時不對應，很容易寫錯，應特別注意。它們是：one---first, two---second, three---third, five---fifth, eight---eighth, nine---ninth, twelve---twelfth。
(4)表示年，月，日時， 年用基數詞表示，日用序數詞表示。例如：
1949年十月一日讀作: October (the) first, nineteen sixty
2004年九月十日讀作：September (the) tenth, two thousand and four
(5)表示分數時，分子用基數詞表示，分母用序數詞表示。分子大于1時，分母加-s。例如：
three fourths,
one second,
two fifths
(6)序數詞有時用縮寫形式：
first→1st second→2nd
third→3rd fourth→4th
twenty-second→22nd
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