There's the voiced TH and the unvoiced TH.

有浊 TH 和清 TH。

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

这生过去式中动词以清结尾情况。

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，一种浊，一种清。

So that is an unvoiced sound.

所以那个清。

But some sounds are not voiced.

但有些因素不用出声——清。

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

所以，当“ed”后缀出一个清辅之后，它就变成了一个“t”。

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

们来看看“ed”后缀出一个清辅之后情况。

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，来谈谈清和浊区别。

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，这样你才能理解浊和清之间区别。

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

如果它一个清辅，那么它就失去了质，变成了一个“t”。

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

如果第一个辅清，无论怎样，第二个也会清。

Tongue between the teeth, breathe the air around, use your voice for voiced, don't use your voice for unvoiced.

舌头放牙齿之间，吐气，浊，不清。

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

单词末尾浊辅会稍微清。

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

当单词以清辅结尾时，们/s/。

So let's start with the unvoiced, " thank" , " thank" , " thunder" , " thunder" .

让们从清开始，thank，thank，thunder，thunder。

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

如果你愿意，可以练习从清到浊再重复。

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

当然，清 TH 指们不用声带出声。

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

但首先，让们尝试一些带有浊和清句子。

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

但接下来部分非常非常重要，因为 TH 分清和浊。

Either two voiceless consonants or two voiced consonants.

两个清或两个浊辅。