冠詞在句子中的位置

1) 不定冠詞位置

 不定冠詞常位於名詞或名詞修飾語前。注意: 
 a. 位於下列形容詞之後: 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後:
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,冠詞放在其後。
但當rather,quite 前仍有形容詞,不定冠詞放其前後均可。如:quite a lot

 d. 在as,though 引導的讓步狀語從句中,當標語為形容詞修飾的名詞時,不定冠詞放形容詞後:
  brave a man though he is,he trembles at the sight of snakes. 他儘管勇敢,可見到蛇還是發抖。
當名詞被比較級形容詞修飾時,不定冠詞通常置於比較級形容詞之後。

2) 定冠詞位置
  定冠詞通常位於名詞或名詞修飾語前,但放在all, both,double,half,twice,three times等詞之後,名詞之前。
  all the students in the class went out. 班裡的所有學生都出去了。