A voiced consonant at the end of a word will be slightly unvoiced.

单词末辅会稍微清。

When the word ends with a voiceless consonant, then we add an S.

当单词以清辅结时，们发是/s/。

It happens in the past tense when verbs end with an unvoiced sound.

这发生在过去式中动词以清结情况。

But first, let's try some sentences with both the voiced and the unvoiced.

但是首先，让们尝试一些带有和清句子。

So that is an unvoiced sound.

所以那是个清。

Now as I mentioned, there are two 'th' sounds, a voiced sound and an unvoiced sound.

正如之前所说，“th”有两种发，一种是，一种是清。

But some sounds are not voiced.

但是有些因素是不用发出——清。

If the first one is unvoiced, the second one will sou nd unvoiced, no matter what you do.

如果第一个辅是清，无论怎样，第二个也会是清。

Either two voiceless consonants or two voiced consonants.

两个清或两个辅。

Now when the -ed suffix appears after a voiceless consonant.

现在们来看看“ed”后缀出现在一个清辅之后情况。

So the unvoiced TH, of course, is when we do not make a sound with our vocal cords.

当然，清 TH 是指们不用带发出。

Practice going from unvoiced to voiced and back if you want.

如果你愿意，可以练习从清到再重复。

So let's go straight into it and talk about the differences between the unvoiced and the voiced.

那们就直奔主题，来谈谈清和区别。

If it's a voiceless consonant, then it loses its voicing quality, and it turns into a 't'.

如果它是一个清辅，那么它就失去了质，变成了一个“t”。

But the next part is very very important because we have an unvoiced TH and we have a voiced TH.

但是接下来部分非常非常重要，因为 TH 分清和。

So when the -ed suffix appears after a voiceless consonant, then it turns into a 't.'

所以，当“ed”后缀出现在一个清辅之后，它就变成了一个“t”。

It's got that unvoiced TH at the beginning.

一开始就是清。

Phonemes like ss, sh and h, are voiceless, they're breath only.

像 ss、sh 和 h 这样素是清，它们只是呼吸。

Remember, voice and voice, unvoiced and unvoiced, T or D, then it will be ID.

记住，对，清对清，T或D，然后就会是ID。

This is really important to practice so that you can understand the difference between voiced and unvoiced.

这样练习非常重要，这样你才能理解和清之间区别。