不定冠词a/an的区别
归纳: a用在以辅音音素开头的单词前，an用在以
元音音素开头的单词前，判断一个单词是元音开 头还是辅音开头，要根据其读音，而不是根据首 字母。Βιβλιοθήκη 国际音标要注意的字母：
(1) 以u开头的单词，要注意区别。如： umbrella，unusual story，unhappy boy， university， useful book, unit (2)以e开头的单词，要注意区别。如： egg European boy (3)以h开头的单词，要注意区别。如：
There is “f” in the word “five”. (在“five”中有字母“f”。)
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hour, honest boy
要注意的数字：
• (4)注意这几个数字（1,11，与8相关的数字） • a one-year-old boy • an eveven-year-old boy • an eighty-year-old man
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1.There is _a___“u” in the word “use”. 2.There is __a_n_ “h” in the word “there”. 3.There isn't __a__ university in our town. 4.Tony is __a_n_ honest boy. 5. London is _a___ European city. 6. __A_n__ 8-year-old boy is playing games. 7.There are 60 minutes in _a_n_ hour. 8. Liu Xiang is _a_n_ unusual player.