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1、Unit 4 Discovering Useful Unit 4 Discovering Useful LanguagesLanguagesSubjective clause 补充知识点补充知识点Part 2 主语从句中的八个点Part 1 复习主语从句基本概念Part 1复习主语从句基本概念1. 主语从句的定义： 用来_的从句，属于_从句，位于_，有形式主语it时，则位于_。e.g.1). Whether she will accept the invitation is not clear yet.2). When we will hold the sports meet has not
2、been decided on yet.3). It is possible that everyone goes to a satisfactory university if they study hard.2. 主语从句的连接词： _ 用于引导陈述句，只起连接作用，无含义，不充当成分，不可省略。 _ 用于引导一般疑问句，起连接作用，翻译为“是否”，不充当成分，不可省略。 _用于引导特殊疑问句，起连接作用，翻译为相应的疑问含义，在从句中作主，宾，表，定作主，宾，表，定；不可省略。 _ 用于引导特殊疑问句，起连接作用，翻译为相应的疑问含义，在从句中作状语状语，不可省略。3. 形式主语： 由t
3、hat引导的主语从句，为了避免头重脚轻，主语从句会置于句尾，而用_作形式主语。 常见的形式主语形式： It be +_ + that 从句 It be +_+ that 从句 It +_+that 从句Part 2主语从句中的八个点1. 从句语序改错：1). What have I forgotten is that I have a test today.2). Where had he lost the laptop was what we wanted to know.3). Whether do they use too many chemical pesticides is unkn
4、own.4). Who did this is still a mystery.总结：在任何情况下，主语从句都用_ 。2. 主句谓语动词的选择：填空：1). What you said at the meeting _(describe) a bright future for the company.2). Whether it will rain or not_(be) not clear.3). That he has won so many awards_( surprise) us.4). When he left us and Why he did that _(remain) u
5、nknown to us.5). What we need_(be) more personal computers.6). What we need _(be) more time.2. 主句谓语动词的选择： 总结：单个主语从句作主语，描述的是一件事情，所以谓语动词用_。两个或多个从句作主语，描述的是多个事情，谓语动词用_。由what 和who 引导主语从句时，谓语与_保持一致。3. 时态的选择填空：1). What_(cause) the accident yesterday still remains unknown at present.2).What you _(achieve) i
6、n the future is decided by what you are doing now.3). How we _( get) here in ten days was discussed at the meeting yesterday.4). That he_ (lose) his balance made him slip on the ice.5). Last week, that the earth _(turn) from west to east was said to us by our geography teacher.3. 时态的选择 总结：主句用一般现在时态，
7、从句根据句意，可用_。主句用过去时态，从句只能用_。 若从句为客观真理，总是用_。4. that 的省略填空：1). _ he was ill yesterday is known now.2). It happened _ I had no money with me that day.总结：无论陈述句的主语从句谓语句首还是句尾，_5. if/ whether 的选择填空：1). _ it will rain or not is not clear.2). It is uncertain _ he will leave for Beijing tomorrow.3). It doesnt m
8、atter _ you pay by cash or credit card in this store.4). It is still unknown _ the big boss can come or not.总结：主语从句位于_，只能用whether;主语从句置于_，可用if/ whether; 但如有_, 或者_，则只能用whether.6. what 的使用填空并翻译：1). _ can help us solve this problem is still unknown to us._能够帮我们解决这个问题还不清楚。2)._ struck me most in the movi
9、e was the fathers deep love for his son.电影中_是父亲对儿子深深的爱。3). _ matters most is to start acting now._现在要行动起来了。4). _ he said is reasonable._是合理的。6. what 的使用5). _ worries many people is that these chemicals may even cause cancer._是这些化学品甚至会引发癌症。6). _ he was ten years ago is totally different from what he
10、look like now.他_和现在有很大的不同总结：what 在主语从句的基本含义是 _；但更多时候，翻译为_; _等，做题时的关键是看_。更重要的是，熟记典型例句。补充what在其他名词性从句中的用法填空并理解what 的含义：1). He saves _ he earns.(_)2). He is no longer _ he was.(_)3). He is_ is generally called a fool.(_)4). Our income is now double _ it was ten years ago.(_)5). After _seemed like hours
11、 he came out with a bitter smile.(_)6). This is _ they call Salt Lake City.(_)7). _ makes the book so extraordinary is the creative imagination of the writer. (_)7. that 与what 的选择填空：1). _ light travels in straight lines is known to all.2). _ we need is more time.3). It is clear _ he was not fit for
12、the work.4). It is by no means clear_ the president can do to end the strike.总结：that 引导_，what引导_。使用what时，从句一定缺少_。8. 主语从句与分词短语作主语句型转换：1). That he lost his balance made him slip on the ice. _made him slip on the ice.2). That he was ill yesterday is known now. _is known now.3). That you have recovered from your illness is a great relief to us. _ is a great relief to us.4). That he was misunderstood by the teacher made him very upset. _ made him very upset.8. 主语从句与分词短语作主语 总结：主语从句可与现在分词转换，即把从句主语换为_，谓语动词换为_，构成_; 被动形式为_. 这样的句子结构在作文中作文中是简化句型，提升句型运用能力的很好表现。Thank youThank you