在以下情况下通常不需要加冠词：
物质名词和抽象名词前
The desk is made of wood.
What is work？ Work is struggle.
专有名词前
Canada, Beijing, Lei Feng
名词前有物主代词、指示代词、不定代词、名词所有格修饰时
this, my, that, those, these, her
Mike's school is over there.
月份、星期、季节前
Sunday, March, summer, winter
表示一类人或事物的复数名词前
Horses are useful animals.
We are all students.
当一个名词用作表语、同位语补足语来表示某人在当时或现刻的职位或头衔时，前面不用冠词
He is chairman of the Students’ Union.
They elected him president of the U.S.
三餐前
breakfast, lunch, supper
在球类、棋类名词前
Play football, basketball, volleyball, chess
在学校、医院、教堂等常用地点前
Ken's brother is in prison for robbery.
Ken went to the prison to visit his brother.
抽象名词、物质名词前不用冠词，但后有定语修饰加the
He is fond of music.
The music of the film is very beautiful.
表示泛指不可数名词或可数名词复数
Water is essential for life.
Books are my favorite things.
一日三餐前
I had a good lunch yesterday.
I have breakfast at 7 every day.
与by连用的交通工具前
by car, by taxi
两个相同或相对的名词构成的平行结构前
day and night
在有些词组中，有无冠词含义不同
school, bed等为表示“处所”的名词，不是指具体地点，不用冠词
这些规则可以帮助你在不同情况下正确使用冠词或不使用冠词。