flights是複數, there were ,但為什麼單數名詞後面要加a n ( a )?準確地說, there were estimated 45million flights ?
母語人士的回答
Rebecca
這是個好問題! A n是一個不定冠詞。不定冠詞是指未指定對象時在名詞之前添加的冠詞。 An estimated 48 millions flights ,因為我們不知道確切的An estimated 48 millions flights 。 There were estimated 48 million flights worldwide對於以英語為母語的人來說不是一個完整的句子,而且非常尷尬。這是不定冠詞a的示例。例子: Could you please give me a book? (請給我本書嗎?)例子: I need an honest opinion. ( I need an umbrella.誠實的意見。)例如: I need an umbrella. (我需要一把雨傘。)