In this American English pronunciation video,
在这个美式英语发音教学视频中，
we're going to take a look at how this letter is pronounced.
我们来看看字母s是如何发音的。
I often get emails from people asking questions like,
我经常收到一些人的电子邮件，他们问：
'Why is the CH in CHICAGO pronounced differently than the CH in CHOICE?'
“为什么chicago中的ch与choice中的ch发音不同？”
SH vs. CH. And my answer is always, unfortunately,
这是[ʃ]与[tʃ]发音之间的区别。我的回答总是：不幸的是
the sounds of American English do not correspond one-to-one with the letters of the alphabet.
美式英语的发音与字母表中的字母并不一一对应。
To know for sure how a word is pronounced,
为了确定一个词的发音，
you need to either hear a native speaker say the word,
你需要听到一个母语为英语的人说这个词，
or look up the word in a dictionary that has the International Phonetic Alphabet transcription.
或者在有国际音标的字典里查一下这个词。
Let's look at the letter S. In the word 'some', it is the sss sound.
让我们看一下字母S。在“some”这个单词里，就是清辅音/s/。

In the word 'his', the zzz sound.
在“his”这个单词里，就是浊辅音/z/。
In the word 'sugar', it's the sshh sound.
在“sugar”这个单词里，就是清辅音/ʃ/。
And in the word 'measure', the ddjj sound.
在“measure”这个单词里，就是浊辅音/ʒ/。
Some, his, sugar, measure.
再读一遍，Some，his，sugar，measure。
So when you see this letter in a word, you can't make assumptions about how it is pronounced.
所以当你看到这个字母在一个单词里，你不能想当然地认为它就是这么发音的。
Look it up in a dictionary, or have native speaker say the word to you.
请在字典里查一下这个单词，或者请教母语人士，让他给你示范一下。
That's it, and thanks so much for using Rachel's English.
就这样了，谢谢你使用瑞秋英语。
Don't stop there. Have fun with my real-life English videos.
不要就此停住脚步，好好享受我的真人英语发音教学视频吧。
Or get more comfortable with the IPA in this play list.
或者学习播放清单中的国际音标，你会更加满意的。
Learn about the online courses I offer, or check out my latest video.
了解我提供的在线课程，或查看我的最新视频。