a与an的用法区别
a与an的用法区别
a用于辅音前；an用于元音前。一般说来，元音字母发元音(元音指元音音素而不是元音字母），辅音字母发辅音，但需请注意以下3点：
1. 拼写以辅音字母开头读音却以元音开头的单词
  hour ['auə], honest['ɔnist], honor['ɔnə]等单词的拼写虽然以辅音字母h开头，但其读音却以元音开头，因此，前面要用等单词的拼写虽然以辅音字母an。
  可熟记下面这句话：An hour ago, an honest man accepted an honorable task. (一小时前，一位诚实的人接受了一项光荣的任务。)
2. 拼写以元音字母开头读音却以辅音开头的单词
useful['ju:sful] , university [,ju:ni'və:səti], usual ['ju:ʒuəl], European [,juərə'pi:ən], united[ju:'naitid] , one-eyed ['wʌn'aid], one-way ['wʌn'wei]等单词的拼写虽然以元音字母开头，但其读音却以元音开头，因此，前面要用a等单词的拼写虽然以元音字母开头，
可熟记下面这句话：In a university, a European and a one-eyed man walk along a one-way road with a usual tool. This is a usual thing. (在一所大学里，有一个欧洲人和一个独眼龙拿着有用的工具沿着一条单行道行走，这是件平常的事。)如：
Five years ago her brother was ________ university student of ________ physics. (上海卷))
A. a; the          B. an; the              C. an; /                        D. a; /
【分析】答案选D。因为university是以辅音[j]开头的要用a，排除B和C；physics是学科名词，前面不用冠词。
3. 英文字母前用a还是用an的问题在26个英文字母中，a, e, i, o, f, h, l, m, n, r, s, x等12个字母的读音是以元音开头的，其余字母则是以辅音开头的。如：
Please pay attention to your spelling. You have dropped ________ ”m” here. (全国卷)
A. an                  B. the                    C. /                    D. a
【分析】答案选A。因为字母答案选m的发音是以元音[e]开头的，所以用an；这里的an的意义与one相当，表示“一个”。
（一）音标测试：出下列划线部分发音不同的单词.
(  ) 1. A. cake      B. take      C. nap      D. wave
(  ) 2. A. bread      B. ea好听的英文歌曲推荐t      C. tea      D. seat
(  ) 3. A. never      B. leg      C. red      D. he
(  ) 4. A. good      B. too    C. book      D.neighborhood
(  )5. A. father      B. Cr时尚童装品牌ab螃蟹      C. shark      D. car
(  )6. A. soda 苏打 B. hot      C. b给教师的一百条建议读后感ox      D. not
(  )7. A. bike      B. five      C. my      D. his
(  )8. A. order      B. doctor      C. boring      D. corner
(  )9. A. what      B. water      C. walk      D. talk
(  )10. A. go      B. no      C. to      D. nose
(  )11. A. day      B. play      C. they      D. Sunday
(  )12. A. lot        B. not      C. to         D. follow
(  )13. A. each      B. idea      C. theatre      D. dear
工商银行信用卡中心进度查询(  )14. A. flower      B. follow      C. how        D. brown
(  )15. A. slide    B. hi     C. toilet      D. bike
(  )16. A. you        B. house        C. blouse      D. trousers
(  )17. A. study      B. puzzle      C. bus      D. busy
(  )18. A. find    B. di个人总结 公务员ning-room    C. behind      D. pumpkin
(  )19. A. kitchen  B. sandwich      C. China      D. peach
(  )20. A. street    B. coffee            C. meet      D. see
（二）完型填空
Mr Bush comes from  1  .He is now  2  a middle school in our city. He has sixty students. He often says his class is too big and it is hard work for him to talk with every student  3  English. He enjoys  4  black tea and green tea. He likes Chinese food  5  ,too. He doesn’t 6  drinking milk. He likes playing basketball, but he  7  play well. His son and I 8 in the same class.  9  name is James. We are 10 .
(  )1.A. Canada B. Canadian  C. a Canada   
(  )2.A. for    B. on    C. in    D. to
(  )3.A. with    B. in    C. at    D. for
(  )4.A. to drink  B. drinks    D. drinking
(  )5.A. very much  B. very    C. much
(  )6.A. like  B. likes C. liking  D. to like
(  )7.A. isn’t B. aren’t C. don’t  D. doesn’t
(  )8.A.be    B. am    C. is    D. are
(  )9.A,My  B. Your    C. His    D. Her
(  ) 10.A. a friend B. a friends  C. friendly   
（三）阅读理解
麦克风电脑
(A) It's seven thirty now. It's time to go to school. Our classroom is behind the trees.It's very nice. There is a map of China on the wall. Twenty boys and fifteen girls are in the classroom. There are some flowers on the teacher's desk. They are for our teachers. We have four classes in the morning and two in the afternoon. We aren't at school on Sunday.
(    )1.The students go to school at ----- .
A.7:13              B.7:03                  C.7:30
(    )2.Their classroom is ------- some  trees.
A. behind              B. in              C. under
(    )3.A map of China is on the------  .
A. desk                B. wall          C. blackboard
(    )4.The  -------  are for the teachers.
A. maps                    B. desks        C. flowers
(    )5.There are --------- students in this class.
A. forty-five              B. fifteen      C. thirty-five
( B )  We can see a picture of a classroom. It is our classroom. It’s small. We have 25 students in our class. The walls（墙）are white and the desks and chairs are new. On th
e wall there is（有） a flag（旗子） and a clock. There is a map of China, too. Some plants are on the desk  They are for our teacher, Miss Smith. She likes her students. She comes to school early.

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