a和an的使用区别
<p><span word="a">a</span>和<span word="an">an</span>的使用区别</p><p><span word="a">a</span>加在以辅音开头的名词前，如<span word="a">a</span> <span word="book">book</span>，<span word="a">a</span> <span word="pen">pen</span>。</p><p><span word="an">an</span>加在以元音开头的名词前，如<span word="an">an</span> <span word="egg">egg</span>，<span word="an">an</span> <span word="apple">apple</span>。</p><p>注意</p><p>有时<span word="a">a</span>，<span word="an">an</span>后面紧接的不是单数名词，而是<span word="a">a</span> (<span word="an">an</span>) +形容词+单数名词的形式。这时判断用<span word="a">a</span>还是<span word="an">an</span>来表示&<span word="ldquo">ldquo</span>;一个的概念时，要看形容词开头字母的发音，而不是看名词。</p><p>2.复数</p><p>英语中，如果要表示两本书、三个学生、四把椅子这些两个或两个以上的概念时，要用名词的复数形式，名词的复数形式是在单数名词后加上词尾-<span word="s">s</span>或-<span word="es">es</span>构成的。变复数时情况如下：</p><p>(1)一般情况下,在词尾加<span word="s">s</span>.</p><p><span word="eg">eg</span>.<span word="book">book</span>&<span word="mdash">mdash</span>;&<span word="mdash">mdash</span>;<span word="books">books</span>,<span word="dog">dog</span>&<span word="mdash">mdash</span>;&<span word="mdash">mdash</span>;<span word="dogs">dogs</span>,<span word="pen">pen</span>&<span word="mdash">mdash</span>;&<span word="mdash">mdash</span>;<span word="pens">pens</span>,<span word="boy">boy</span>&<span word="mdash">mdash</span>;&<span word="mdash">mdash</span>;<span word="boys">boys</span></p><p>以轻辅音结尾的名词后的<span word="s">s</span>的读音为[<span word="s">s</span>]，以浊辅音和元音结尾名词后的<span word="s">s</span>读音为〔<span word="z">z</span>〕。</p><p>(2)以<span word="s">s</span>,<span word="x">x</span>,<span word="ch">ch</span>,<span word="sh">sh</span>结尾的词名词变复数时,要在词尾加<span word="es">es</span>.</p><p><span word="eg">eg</span>.<span word="beach">beach</span>&<span word="mdash">mdash</span>;&<span word="mdash">mdash</span>;<span word="beaches">beaches</span>,<span word="brush">brush</span>&<span word="mdash">mdash</span>;&<span word="mdash">mdash</span>;<span word="brushes">brushes</span>,<span word="bus">bus</span>&<span word="mdash">mdash</span>;&<span word="mdash">mdash</span>;<span word="buses">buses</span>,<span word="box">box</span>&<span word="mdash">mdash</span>;<span word="boxes">boxes</span>(<span word="es">es</span>读音为〔<span word="iz">iz</span>〕</p><p>(3)以&<span word="ldquo">ldquo</span>;辅音字母+<span word="y">y</span>结尾的名词,先变<span word="y">y</span>为<span word="i">i</span>,再加<span word="es">es</span>.</p><p><span word="eg">eg</span>.<span word="city">city</span>&<span word="mdash">mdash</span>;&<span word="mdash">mdash</span>;<span word="cities">cities</span>,<span word="family">family</span>&<span word="mdash">mdash</span>;&<span word="mdash">mdash</span>;<span word="families">families</span>,<span word="documentary">documentary</span>&<span word="mdash">mdash</span>;&<span word="mdash">mdash</span>;<span word="documentaries">documentaries</span>,<span word="country">country</span>&<span word="mdash">mdash</span>;&<span word="mdash">mdash</span>;<span word="countries">countries</span>,</p><p><span word="strawberry">strawberry</span>&<span word="mdash">mdash</span>;&<span word="mdash">mdash</span>;<span word="strawberries">strawberries</span>(<span word="ies">ies</span>读音为[<span word="iz">iz</span>])</p>
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