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课件网) Review: noun clauses Unit 5 Into the unknown Grammar To review noun clauses To apply noun clauses in real contexts Learning objectives Activity 1 Look at the sentences from the reading passage and answer the questions. a Although his theory has been dismissed by scholars, it shows how powerful the secrets of Ancient Maya civilization are among people. b But the greatest mystery of all is what caused the Maya to abandon most of their great cities. c Why Maya civilization collapsed remains a mystery. 1 Which sentence contains a clause that serves as the subject of the sentence 2 Which sentence contains a clause that serves as the object of the sentence 3 Which sentence contains a clause that gives further information about the subject in the sentence Sentence c. Sentence a. Sentence b. 4 What do “how”, “what” and “why” in each sentence refer to In sentence a, “how” refers to the extent of power of Ancient Maya civilization’s secrets; In sentence b, “what” refers to the thing that caused the Maya to abandon most of their great cities; In sentence c, “why” refers to the reason that Maya civilization collapsed. Now look for more sentences with noun clauses in the reading passage. 1. Intrigued by Maya civilization from a very young age, 15-year-old Canadian William Gadoury thought he had made an incredible discovery from his study of ancient star charts. 2. Through comparison, he found that the locations of the 117 known Maya cities correspond to the positions of the stars. 3. Based on this, he believed he had spotted an unknown Maya city buried deep in the jungle. 4. What is most extraordinary about these complex structures is how they were built without the use of wheels, metal tools or even animal power. 5. The fact that Maya society was technologically primitive makes its achievements all the more incredible and mysterious. 6. By changing the landscape in this way, it is possible that the Maya people unknowingly reduced their ability to deal with natural disasters. 8. Many scientists believe that these droughts were the main reason why Maya civilisation began to collapse at different rates in different places. 7. Some recent studies have found that there were far fewer tropical cyclones than usual between 700 AD and 1000 AD. 一、名词性从句概述 Summary 二、名词性从句要点 1. 主语从句 1) that从句位于句首时, that不能省略。如: That theory must go hand in hand with practice is a principle we should always keep in mind. 2) 有时可用形式主语it代替主语从句, 将it放在句首, 主语从句放在句末, 以避免句子头重脚轻。如： It is not known yet where she has gone. 2. 宾语从句 1) 当宾语从句后有宾语补足语时, 需要用it作形式宾语, 而将宾语从句后置。如： I made it clear that we were determined to carry out the plan. 2) 当主句主语是第一人称，且谓语为think, believe, suppose, expect等动词时, 如果宾语从句表示否定意思, 通常否定前移, 即否定主句的谓语。如： I don’t think there’s a computer store in the t ... ...
