【不定冠詞有哪些 不定冠詞用法有哪些？】1、不定冠詞有a (an)與數(shù)詞one 同源，是一個的意思 。a用于輔音音素前 ， 一般讀作e，而an則用于元音音素前 ， 一般讀做en 。
2、表示一個，意為one；指某人或某物，意為a certain 。A Mr. Ling is waiting for you.
3、代表一類人或物 。A knife is a tool for cutting with. Mr. Smith is an engineer.
4、詞組或成語 。a little / a few / a lot of / 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
