“A, An和The”的使用是英语初学者最容易迷糊的部分，下面的一些简单规则可以更好地帮助我们学会”A, An和The”的使用：
1， a = indefinite article (not a specific object, one of a number of the same objects) with consonants
She has a dog.
I work in a factory.
2， an = indefinite article (not a specific object, one of a number of the same objects) with vowels (a,e,i,o,u)
Can I have an apple?
She is an English teacher.
3，the = definite article (a specific object that both the person speaking and the listener know)
The car over there is fast. 说话双方都清楚这个car指的是哪辆车。
The teacher is very good, isn’t he? 说话双方都清楚这个teacher是谁。
4，The first time you speak of something use “a or an”, the next time you repeat that object use “the”.
句子中，某个事物第一次出现时用”a or an”，再次出现时用”the”
I live in a house. The house is quite old and has four bedrooms.
I ate in a Chinese restaurant. The restaurant was very good.
5, DO NOT use an article with countries, states, counties or provinces, lakes and mountains except when the country is a collection of states such as “The United States”.
在国家、州、湖、山等地名前不用这些冠词，除非是像”The United States”这样联合体国家。
He lives in Washington near Mount Rainier.
They live in northern British Columbia.
6， DO NOT use an article when you are speaking about things in general
I like Russian tea.
She likes reading books.
7， DO NOT use an article when you are speaking about meals, places, and transport
谈论meals, places, and transport（餐饮，地点及交通方式）时不用冠词
He has breakfast at home.
I go to university.
He comes to work by taxi.