1） 不定冠詞的位置

不定冠詞常位于名詞或名詞修飾語前。注意：

a. 位于下列形容詞之后：such, what, many, half

I have never seen such an animal.

Many a man is fit for the job.

b. 當名詞前的形容詞被副詞 as, so, too, how, however, enough 修飾時，不定冠詞應放在形容詞之后：

It is as pleasant a day as I have ever spent.

So short a time.

Too long a distance.

c. quite, rather 與單數名詞連用，冠詞放在其后。

但當 rather, quite 前仍有形容詞，不定冠詞放其前后均可。如：quite a lot[1][2]