老师：Hello everyone, welcome to my class. Today we focus on the grammar revision, non clause, 1st. Let's make clear of the learning objectives. At the end of this class you will be able to first review the functions of non clauses, 2nd, master the different usages of the conjunctions and finally try to use non clauses in different contexts properly. And this is also the focus of this class. Noun clauses act like nouns and can function as the subject, object, predictive or a positive in the sentence. So there are four types of non clauses, subject class, object class, predictive clause and a positive cause. Now please read the following sentences, pay attention to the red part of each sentence and tell what type of noun it is. Think for a moment.
老师：Now let's check 1. The red part functions as the subject in this sentence. So it is a subject. Class 2, the red part functions as the object in this sentence, so it is an object clause. 3, the red part functions as the predictive in this sentence. So it is a predictive class. 4, the red part functions as they are positive in this sentence. So it is an a positive clause. Now since we can distinguish the different types of non clauses, let's move on to the conjunctions of non clauses. Complete these sentences with proper conjunctions.
老师：Now let's check 1. What strikes me first is the way people wear their hair. 2. Children are what the mothers are. 3. That I can pay back the help people give me makes me happy. 4 the news that he couldn't come made us upset. From the first four sentences, we can tell the difference between that and what that is when introducing the non clause. That carries no meaning. Well, what is usually used as the subject, object or predictive in the class. Clear? Let's move on. 5 many people agree that almost everyone is superstitious about a few things. 6. Tell him that he needn't worry and that I will help him out.
老师：Pay attention to these two sentences when introducing the object clause that can often be omitted. For example, sentence five. However, if there is more than one object clause, for example, Sentence 6, normally only the first that can be omitted. We can use if or whether to introduce a non clause. Now please choose the proper one to complete the sentences.
老师：Now let's check. 7 no one knew if or whether he lost his eyesight because of an accident. 8 whether he will be able to come is not yet known. Here we can only use whether when the clause as the subject is at the beginning of the sentence.
老师：9, he hasn't made a decision whether he will go abroad. This is in a positive clause. We can only use weather to introduce in a positive cause. Can. The question is whether we can persuade her to change her mind. This is a predictive cause. We can only use whether to
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