推荐回答（2个）
元音字母o的短元音为/ɑ/，发音时，舌端靠近下齿，舌后部抬高，牙床接近全开，开口较大，双唇呈圆形，通常出现在字首、字中的位置。元音字母o在重读闭音节中发短元音。如：
ox
公牛（阉割过的）
on
在……上面
octopus
章鱼
box
盒子
socks
短袜
operate
操作，动手术
ostrich
鸵鸟
元音字母o的长元音为/o/，如：
rose
玫瑰，上升
nose
鼻子
rope
粗绳
note
音符
人们为了避免用手写体（也叫圆体字）书写的文件上的辨认困难，规定，凡是字母u与m、n、v、w相邻时，元音字母u要改写成o，这时的o发u的短元音/ʌ/。
other
其它的
another
另一个
mother
母亲
brother
兄弟
nothing
没有东西
son
儿子
ton
一吨
won
赢得，韩圆
monk
僧侣
among
在……三者以上之间
cover
覆盖
dove
鸽子
come
来
become
变成
some
一些
sponge
海绵
希望我能帮助你解疑释惑。
一般情况下：
o
开音节
/əu/
note
no
闭音节
/ɒ/
dog
lot
1．开音节
1）以发音的元音字母结尾的音节。
例：be，he。
2）以辅音字母（r
除外）+不发音的e结尾的音节。
例：make，like。
*
在重读的开音节中元音字母按字母名称读音。
2．闭音节
以一个或几个辅音字母（r
除外）结尾而中间只有一个元音字母的音节，
称为闭音节。例：map，desk，is。
*
在重读的闭音节中元音字母读做短元音
也有例外的：如host虽然是闭音节重读，但是当中的o也会发成
/əu/，
do当中的o会发成
/u:/
这些单词就要特别记忆了。
希望对你有用！
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