密室逃脱比赛13攻略:A dictionary is an useful book.找错

来源：百度文库编辑：中科新闻网时间：2024/04/28 15:37:38

哪里错了？

an改成a
useful的发音第一个音是辅音，要用a

应为 Dictionary is an useful book or
A dictionary is useful book
前面A 表示专指，后面不能再用an ,二者只能居其一！

useful 前面不能用冠词an,而应该改用a 。

判断冠词a还是an的方法不是看其后面的词是否以a,e,i,o,u这五个原因为首字母，而是根据后面所接词的音标判断，音标为元音则用an，辅音则用an.

此题中，虽然useful这个单词的首写字母是u，但是它的读音【'ju:sful】是辅音开头，所以用a。

类似的还有university....等等，都属于此类情况。

a useful book
useful是辅音开头的，虽然字母是元音

The dictionary is a useful book.
The表示特指某一本。A是一个不定冠词。

A dictionary is a useful book.

A dictionary is an useful book.找错 An affirmation is a pre-planned verification. A cow is as strong an animal as a horse. Is this your dictionary ? No,? is in my desk. A.my B.mine C.your D.yours 请分析一下该句的成分。When is doubt about the meaning of a word,consult a dictionary. An apple a day is good ____ your healh . Is Romeo and Juliet an opera or a play?why? 求助翻译：An affirmation is a pre-planned verification. a zebra horse(an animal that is a cross between a zebra and a horse) it is an hell-like mountain.为什么要用an不用a呢？