五、冠词用法讲练
（一）冠词的位置
1) 在名词词组中，冠词一般放在最前面。例如：
the last few days a really good concert
2) 名词词组里如果有all, both, exactly, just, many, quite, rather, such, what等词，这类词可以放在冠词之前。例如：
all the timeboth (the) brothers
exactly the wrong colourjust the right place
quite a nice dayrather a mess
such a funny story
3) 和as, how／however, so, too连用时, 形容词放在冠词之前。例如：
He’s not so big a fool as you think.
She’s as clever a girl as you’re ever likely to meet.
This is too heavy a bag for me to carry.
How large an armchair did he have?
However tiring a day she may have, she never loses her good humour.

（二）不定冠词 (Indefinite Article)
1) a／an表示“任何一个(类)”，只能用于单数可数名词前。例如：
We are having a committee meeting this afternoon.
a／an不用于不可数名词前。例如：
There will be discussion and argument at the meeting.
He drinks milk every day.
2) 不可数名词用作可数名词时，可用a／an。例如：
I’ve just bought a lovely big Danish cheese.
I don’t like cheese.
She was inspired with a new courage.
She showed great courage.
3) 用于表示价格、速度、比率等名词前，如five pence a kilo, sixty kilometers an hour, four times a day等。
4) 用于下列这样的固定短语中。如a couple, a dozen, half a dozen, a hundred, a lot of, a great many, a great deal of, a large amount／quantity of, a good number of 等。
I’ve done a great deal of work today. (不可数)
What a large number of books you have! (可数)
It’s a good five miles(=at least five miles, perhaps mote) to the station.
5) 以元音开头的单词前不定冠词用an, 如：an apple, an egg, an item, an old man, an umbrella, an hour; 以辅音开头的单词前不定冠词用a university student, a humorous man。

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