老师：Hello everyone, welcome to my class. This is our second period of Unit 1, People of achievement. Today we are going to discover a very useful structure. In this class you will, No. 1, recognize and summarize the form and functions of non restrictive relative clauses.
老师：No. 2, use non restrictive relative clauses to describe people of achievement. First, let's review how to Yoyo is described in our reading. Do you still remember the first sentence? Let's read it together. This year's Nobel Prize for physiology or medicine has been awarded to Tuyoyo, whose research led to the discovery of automation, a crucial new treatment for malaria.
老师：We can learn a lot from this opening sentence. How can one sentence give us so much information? Good. A class where is it? Yes, it starts with a whose and this class describes 2 Yoyo. So we can call this class a relative class.
老师：this is called a relative class 定语从句 to yoyo is the non that proceeds 先行词。
老师：So let's see whether we can find more relative clauses in the sentences. You can find this activity in on page 5 in your book. In this activity we are going to underline the relative clauses and try to find the function of the causes. You can pause this video for about 3 minutes to underline the relative causes.
老师：Okay, time is up. Let's see if we have the same results. No. 1, where is the class good? It start from that. And where is the NUM treatments? So I have an extra question for you. What is the function of the class good? This class help limit and restrict the word treatment so that we can know what kind of treatment is taken. This clause is what we called restrictive.
老师：relative clause 限定性定义从句 lets see the other three。
老师：No. 2, where is the class? Get it, start from which? And where is the noun? Yes, Nobel Prize. So the same question again. What is the function of the class? Does it also limit Nobel price now? In fact, it helps give extra information about Nobel Prize.
老师：在这个复合句中，我们可以看到定语从句补充说明了诺贝尔奖它的地位。
老师：next one where is the class。 Yes. Start from where? But pay attention. It ends here. So where is the Nanda proceeds? this hainan。 What is the function of the class? This function also gives extra information about what happened in high.
老师：难，在这个复合句中我们可以看到定义从句补充说明了海南发生了什么。next。 1, where is the class? Yes, it starts with most of whom. Where is the Nanda? Precise. Yes, it is patience. As for the function of this class, we can see this class also gives extra information to the word he.
老师：sessions 在这个复合句中我们可以看到从句补充说明了病人发生了什么。
老师：So this kind of relative clause is what we called non restrictive relative clause.
老师：What else can you find from these sentences? Good. There is a comma in each sentence. That's very good of you. Now I think it's time for us to compare and summa
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