And that's when they're used in relative clauses to introduce adjective clauses.

那就是在形容词性的定语里面。

So the participle is just a reduced adjective clause.

这个分词就是这个定语的省略形式。

One kind of dependent clause is the adjective clause. It gives more information about a noun.

定语是的一种，它更多与名词相关的信息。

The last relative pronoun " what" can also be used in relative clauses, but it is different.

最后一个关系代词 “what” 也可以用于定语中，但是它比较特别。

Defining relative clauses such as these specify which noun we are talking about.

像这些子就是限定性定语，限定我们所讨论的名词是哪个。

They use the relative pronouns " who" and " which" .

限定性定语会用到关系代词 “who” 和 “which”。

If it is at the end of the relative clause, the sentence is less formal.

如果它出现在定语末，子就会不那么正式。

So, if you don't know what a relative clause is, that's okay.

所以，如果你不知道什么是定语，也没关系。

Now what is a defining relative clause?

什么是限定性定语？

So, we have relative clauses in there.

所以，那里有定语。

And we're talking about defining relative clauses.

我们正在讨论限定性定语。

In this programme, we're talking about relative clauses.

在本期节目中，我们将探讨定语。

Yes, relative clauses add information about the person or thing that you're talking about.

是的，定语为所谈论的人或事物添加信息。

The taxi is a small Swiss airplane called a Pilatus Porter .

分词作定语Done 作定语。

Dialogue heavily weighted with adverbs after the attributive verb is cluttery and annoying.

定语动词后面大量使用副词的对话显得杂乱且烦人。

They begin with a pronoun and go after the noun that you want to define.

定语以代词开头，跟在你想要定义的名词之后。

So, let's have a closer look at the grammar of relative clauses.

那么，让我们仔细看看定语的语法。

Today we're talking about defining relative clauses.

今天我们来讨论限定性定语。

For non-defining clauses, you can't leave out the pronoun.

对于非限定性定语，不能省略关系代词。

Let's start by looking at what relative clauses are, and how we make them.

让我们先看看什么是定语，以及我们是如何造一个定语。