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1、一.不定冠词 a/an a 用于辅音开头的单词前 a man a cat*一些元音字母开头的单词是辅音开头：a one-way street a useful book a European an 用于元音开头的单词或单独的字母前 an apple an island an hour an“f”二.a/an 的用法n1.用于第一次提到的单数可数名词前；I need a dictionary.They live in a village.He bought an ice-cream.二.a/an 的用法 2.用于表示泛指的单数可数名词前；A child needs love.=All child
2、ren need love.Any child needs love.二.a/an 的用法n3.作名词补足语（指专业名称）：Shell be a dancer.The man in blue is an actor.二.a/an 的用法 4.用于一些表示数量的短语中；a lot of,a great number of,a bit of,a little二.a/an 的用法 5.用于一些数词中（或者用 one);a hundred,a thousand,a half-holiday,a third,二.a/an 的用法 6.用于表示价钱，速度，比率等的短语中；5 pounds a kilo,6
3、0 kilometres an hour,four times a day.二.a/an 的用法 7.用于感叹句中的可数名词前；What a pretty girl!What an interesting book!二.a/an 的用法8.用在称呼前，含有“我不认识的感觉”A Mr.Smith is waiting to see you.一位史密斯先生正等着要见您。三.不用a/an 的情况 1.复数名词前；2.不可数名词前，3.表示早，午，晚餐的名词前；We have lunch at 12.I was invited to dinner.三.不用a/an 的情况*有修饰语的情况除外.He g
4、ave me a good lunch.I was invited to a dinner given to welcome the visitors.四.定冠词 the the 可与单数、复数名词连用；1.用于表示独一无二的事物或群体；the earth,the sky,the sun四.定冠词 the 2.用于第二次提到的明确的名词前；His car hit a tree.You can still see the mark on the tree.三.定冠词 the 3.用于短语或从句限定的名词前，the girl in white,the man with good manners t
5、he boy that I met四.定冠词 the 4.用于特指某人或某物；Ann is in the garden.(the garden of this house)Please pass the salt.(the salt on the table)四.定冠词 the 5.用于最高级，序数词，only 和 same 前，the first day,the best answer the only way,the same place四.定冠词 the 6.“the+singular noun”可表示一类事物或动物：The panda is in danger of becoming
6、extinct(灭绝）.四.定冠词 the 7.“the+adjective”可表示一类人：the old=old people the rich=rich people 四.定冠词 the 8.“the+plural surname”相当于“the family：the Smiths=Mr.and Mrs.Smith(and their children)四.定冠词 the 9.用于表示海洋，河流，群岛的专有名词前；the Changjiang River the Pacific Ocean四.定冠词 the 10.east,west,north,south 用作名词时要加 the,用作副词
7、时则不用；He lives in the north(n.).Go north(adv.).五.不用定冠词 the 的情况；1.人名和地名；Meimei is from Beijing.2.抽象名词前；They are in great need of help.五.不用定冠词 the 的情况；3.名词所有格和物主代词后的名词前;the boys uncle,It is my room.五.不用定冠词 the 的情况；4.球类运动，三餐及学科等名词前；He plays football well.They have porridge for breakfast.I prefer history
8、 to chemistry.五.不用定冠词 the 的情况；5.表示泛指的复数名词前；Big hotels all over the world are very much the same.五.不用定冠词 the 的情况；6.在bed,home,hospital,work school/college,和 town 前；He is at home.He is in hospital.Its time to go to bed.五.不用定冠词 the 的情况；7.季节，月份，星期和节日名称前；Summer comes after spring.Tomorrow is Childrens Day.