1、课本难点释疑1. In this sense everybodys use of languagewhether English, Chinese, or any otheris different. 【重点知识】 whether English, Chinese, or any other前后用破折号隔开，表示对language作补充说明。whether“是否，会不会；不管，无论”，引导名词性从句或状语从句。例如：Whether you will succeed depends on your effort. （主语从句）I asked whether he had a shotgun. （
2、宾语从句）【拓展知识】 whether和if的用法：whether和if都可译为“是否”，为从属连词，在引导名词性从句时，有时可以换用，有时不能。二者引导宾语从句时，通常可以互换，口语中多用if代替whether，这时whether之后可以直接跟or not， if之后不能直接跟or not，但由whether和if引导的宾语从句末尾都可以加or not。2. The English speakers found a people who had been living in Australia for more than 50,000 yearsthe Aborigines, and an
3、extraordinary variety of wildlife, unique to the continent. 【重点知识】 (1) people是集合名词，谓语动词用复数形式。意为“人，人们”，但与不定冠词a连用时，指一个民族，与定冠词the连用时指人民、民众。例如：The Chinese people are a hard-working and brave one.We Chinese people are brave and hardworking.(2) more than这里相当于over。“more than + 数词”含“以上”或“不止”之意。例如：I have kno
4、wn David for more than 20 years.【拓展知识】 more than的其他用法： “more than + 名词”表示“多于”、“非但尤其是”。 “more than + 形容词”表示“很”或“非常”。 在“more. than.”中，肯定“more”后面的，而否定“than”后面的。3. It is estimated that 1.3 billion people will use English as either a first or a second language by 2050. 【重点知识】 It is estimated that.“据估计”。例
5、如：It is estimated that the output will increase by 15%.【拓展知识】 常见的类似结构有：It is said that“据说”；It is agreed that“人们同意”；It is believed that“人们相信”；It is known that“众所周知”；It is reported that“据报道”；It is supposed that“人们推测”；It is thought that“人们认为”；It is hoped that“人们希望”；It is proved that“根据证明”；It is suggested that“人们建议”；It is required / demanded that“据要求”；It goes without saying that“不言而喻”。
