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外研版（2019）选择性必修四《Unit 5 Into the unknown》Period Four Grammar—Review：noun clauses优秀教学课件
Into the unknown
Period Four Grammar—Review：noun clauses
内容索引
感知以下课文原句，补全方框下的小题
语法感知
语 法 导 学
感悟规律 重点难点剖析
1.Through comparison，he found that the locations of the 117 known Maya cities correspond to the positions of the stars.
2.Based on this，he believed he had spotted an unknown Maya city buried deep in the jungle.
3.What is most extraordinary about these complex structures is how they were built without the use of wheels，metal tools or even animal power.
4.The fact that Maya society was technologically primitive makes its achievements all the more incredible and mysterious.
5.Why Maya civilisation collapsed remains a mystery.
6.By changing the landscape in this way，it is possible that the Maya people unknowingly reduced their ability to deal with natural disasters.
1.以上各句都是主从复合句，句中用了相当于 作用的从句(即名词性从句)在句中充当成分。
2.名词性从句可在句中作宾语，如句1和句2；句2中的宾语从句省略了引导词
。
3.名词性从句可在句中作 ，如句3中what引导的部分和句5中why引导的部分。
4.名词性从句可在句中作 ，且可用it作 ，真正的主语置于句末，如句6。
5.名词性从句可在句中作 ，如句3中 how引导的部分。
6.名词性从句可在句中作 ，如句4。