(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(shù)詞的用法

　　數(shù)詞分基數(shù)詞和序數(shù)詞�；鶖�(shù)詞表示數(shù)目，序數(shù)詞表示順序。

　　1. 基數(shù)詞的用法

　　(1) 基數(shù)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(gè)具體數(shù)字時(shí)，hundred, thousand, million一律不用復(fù)數(shù);在表示一個(gè)不確定數(shù)字時(shí)則用復(fù)數(shù)。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(shù)詞的復(fù)數(shù)形式可用來表示人的歲數(shù)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(shí)刻用基數(shù)詞。例如：

　　We get up at six.

　　The workers begin work at eight.

　　表示“幾點(diǎn)過幾分”，用介詞past,但須在半小時(shí)以內(nèi)。例如：

　　ten past ten,

　　a quarter past nine,

　　half past twelve