三、零冠词（即不用冠词）：
1、专用名词和不可数名词前。如：China, America, Grade One, Class Two, milk, oil, water, paper, science等。
2、名词前已有作定语用的this, that, my, your, some, any等代词。如：
Go down this street.
3、复数名词表示一类人或事物时。如：
We are students. I like reading stories.
4、节日、日期、月份、季节前。如：Teachers’ Day, Children’s Day, National Day, in summer, in July等。
Today is New Year’s Day. It is Sunday. March 8 is Women’s Day.
5、在称呼语或表示头衔的名词前，尤其作表语、宾补时。如：
What’s the matter, Granny? We elected him monitor.
6、在某些习惯用语中的名词前。如：at noon, at night, at first, at last, at most, at least, by bus(train, air, sea), in bed, in time, in front of, go to school, go to bed, go to college, on foot, at table, in ink, in pencil等。
7、在三餐饭和球类运动前。如：
She goes to school after breakfast every morning.
We are going to play football.
We usually have lunch at school.
8、科目前不加。如：
We learn Chinese, maths, English and some other subjects.
【专项训练】：
1、 We can’t live without air.
A．an B．× C．the D．some
2、——Have you seen pen? I left it here this morning.
——Is it black one? I think I saw it somewhere.
A．a; the B．the; the C．the; a D．a; a
3、I’ve been waiting for him for hour and half.
A．×; × B．the; a C．a; the D．an; a
4、What fine weather we have today!
A．a B．× C．some D．an
5、Have you ever seen as tall as this one?
A．a tree B．such tree C．an tree D．tree
6、Children usually go to school at age of six.
A．×; the B．a; an C．the; × D．the; the
7、 Himalayas is highest mountain in world.
A．×; the;× B．The; the; the C．A; a; a D．×;×;×
8、They each have __book. Li Hua’s is about writer. Wang Lin’s is on science.
A．a; a; × B．the; ×; the C．×; the; × D．a; the; a
9、 Physics is science of matter and energy.
A．The; × B．×; × C．×; the D．A; a
10、 sun rises in east and sets in west.
A．A; an; a B．The;×;× C．The; the; the D．A; the; a
11、Many people agree that__knowledge of English is a must in international trade today.
A．a;× B．the; an C．the; the D．×; the
12、 __Mr Jones called while you were out (neither of us knows this man). He was in bad
temper. A．×;a B．A;× C．The; the D．A; a
13、They were at dinner then. It was delicous one.