Unit 5 Into the Unknown Using language课件 2022-2023学年高中英语外研版(2019)选择性必修第四册

新外研社高中英语选择性必修四Unit 5 Into the Unknown Using Language Grammar 2 省略that的宾语从句 that引导的宾语从句 含what引导的主语从句 和how引导的表语从句 that引导的同位语从句 that引导的宾语从句 what引导的主语从句 Presentation a Although his theory has been dismissed by scholars, it shows how powerful the secrets of Ancient Maya civilisation 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 civilisation 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? Look at the sentences and answer the questions. Sentence c. Sentence a. Sentence b. Presentation a Although his theory has been dismissed by scholars, it shows how powerful the secrets of Ancient Maya civilisation 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 civilisation collapsed remains a mystery. 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 civilisation’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 civilisation collapsed. Look at the sentences and answer the questions. Summary 名词性从句是在句子中起名词作用的句子，在复合句中能担任主语、宾语、表语、同位语、介词宾语等，名词性从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。 Noun Clauses 名词性从句 一、引导名词性从句的引导词 连接代词： what, which, who, whom, whose 连接副词： when, where, why, how 连接词： that: 宾语从句或表语从句中that有时可以省略； whether, if：均表示“是否”表明从句内容的不确定性； as if, as though: 均表示“好像”，“似乎”。 Administrator (A) - 二、名词性从句的一般引导词的用法 （2）连接词whether也不充当句子成分，但有自己的 意思，表示“是否”；引导宾语从句时，可换成 if，但引导其他名词性从句时不能换成if。如： I hope (that) you enjoy your holiday. That he likes you is very