1.在很多情况下足否加冠词及加哪个冠词，只是习惯用法的问题，常常很难解释，例如在许多类似的短语中，有的名词前加冠词，有的却不加：
at dawn (noon, night)
in the morning (the day time)
in town, in the city
in front of, at the back of
to play tennis (chess), to Play the piano (the guitar)
to watch TV, to listen to the radio
to catch cold, to have a cold
as a whole, on the whole
at a distance, in the distance
at an end, in the end
2.有很多名词通常为可数名词，在一定情况下却是不可数名词，因此前面没有冠词:
1)作可数名词
They built a school.
他们建了一所学校
We saw a church nearby.
我们看到附近有一所教堂。
They visited a prison.
他们参观了一所监狱。
She bought a new car.
她买了一辆新车。
2)作不可数名词
There's no school today.
今天不上课。
What time does church begin?
什么时候开始做礼拜?
He's been in prison for five years.
他蹲了五年监牢。
She went by car.
她开车去的。
3.有些名词可构成许多习惯用语,以place一字为例，就可构成许多短语:
I have been all over the place to find you.
我到处找你。
If we change Places.you'll be able to see better.
如果我们互换位置，你可以看得更清楚些。
0ld methods must give Place to new.
旧方法应让位给新方法。
That remark was not in Place.
那句话不恰当。
Use water in Place of milk.
用水代替牛奶。
In the first Place we must define our terms.
首先我们必须确定词义。
Your remarks were rather out of Place.
你的说法有些不恰当。
Take your places for the next dance.
站好，准备下一场舞蹈。
The wedding will take Place next week.
婚礼下星期举行。
Who's taking her Place.
谁来代替她?
