冠词本身不能单独使用,也没有词义,它用在名词的前面,帮助指明名词的含义。英语中的冠词有三种,一种是定冠词,另一种是不定冠词,还有一种是零冠词。
不定冠词a (an)与数词one 同源,是一个的意思。a用于辅音音素前,一般读作[e],而an则用于元音音素前,一般读做[en].
1) 表示一个,意为one;指某人或某物,意为a certain.例如:
A Mr. Ling is waiting for you. 有位姓凌的先生在等你。
2) 代表一类人或物。例如:
A knife is a tool for cutting with. 刀是切割的工具。
Mr. Smith is an engineer. 史密斯先生是工程师。
3) 组成词组或成语,如a little / a few / a lot / a type of / a pile / a great many / many a / as a rule / in a hurry / in a minute / in a word / in a short while / after a while / have a cold / have a try /keep an eye on / all of a sudden等。
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