2.1 不定冠词的用法
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。
A Mr.Ling is waiting for you.
2)代表一类人或物。
A knife is a tool for cutting with.
Mr.Smith is an engineer.
3)词组或成语。
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