a
indef art [A is used before a consonant sound; an is used before a vowel sound.] 不定冠词[a 用于辅音音素前; an 用于元音音素前] ① one 一(个):a new book 一本新书/an old man一个老头儿 ② any one; each 任何一个;每个:A gun is dangerous. 枪是危险的。/A square has four sides. 正方形有四条边。 ③ [used distributively] each; every[作分配语用] 每一:once a week 每周一次/five cents a catty 1斤5分钱/forty kilometers an hour每小时40公里 ④ [used before some material nouns] a kind of [用于某些物质名词前]一种:a black tea 一种红茶/Copper is a metal.铜是一种金属。 ⑤ [used when two objects, articles, etc naturally go together] [用于两件自然配套的东西、物 ...... (共946字) [阅读本文]>>