Unit 1 Face values Using language Grammar 主语从句课件-2025-2026学年高二英语外研版（2019）选择性必修第三册

Unit 1 Face values Using language (Subject clauses) Please circle the subject of each sentence. I see a cat, a mirror and a lion. What I see is a cat, a mirror and a lion. How it looks on the outside is totally different from what’s inside. That we can’t judge a book by its cover is really true. It is true that we need to accept ourselves. If a sentence serves as the subject, we call it subject clause. 主语从句 Meaning of subject clause 在复合句中用作主语的从句叫作主语从句。 主语从句可直接放在句首，也可用it作形式主语，而将主语从句后置。 1.that 引导的主语从句 用于陈述一个事实或看法，由原来的陈述句充当。 that 在从句中不作成分，也没有实际词汇意义 that引导主语从句时一般不可以省略 Forms of subject clause that引导的主语从句位于句首 That light travels faster than sound in the air is true. That you didn’t attend that lecture yesterday is none of my business. 形式主语it代替主语从句 主语从句可以用it代替，真正的主语从句后置，以保持句子匀称。 It is obvious that Tom looks happy today. It is reported that the experiment was a success. 常见的it作形式主语的句式主要由以下几种 （1）It be+形容词+that从句 常见形容词：necessary, right, likely, unlikely, certain, clear, obvious, strange, possible等 注意： 在“It is necessary/important/ strange/natural…+that 从句”中，从句谓语常用“should+动词原形”结构，其中should可以省略 It is important and necessary that one (should) master the skills of operating computers. （2）It be+名词+that从句 It is a pity that you didn’t go with us. 常用于这种句型的名词（词组）有： a pity一会, a shame遗憾、耻辱, good news好消息, a fact事实, a wonder奇迹, no wonder难怪, no surprise不奇怪 （3）It be+过去分词+that从句 It is said that the ugly duckling turned out to be a swan. 常见的这种结构： It is said that 据说 it is heard that 听说 it is reported that 据报道 It is thought that 有人认为 it is announced that 据宣布 it is believed that有人认为 在It is suggested/ advised/ ordered/ requested/ insisted/ required/ decided..that从句中，谓语动词用（should）+动词原形 （4）It +特定动词+that从句 It seems to me that you object to the plan.在我看来，你似乎反对这个计划。 It happened that she was out when I visited. 我拜访时她碰巧不在家。 It occurred to me that he might lend us a hand. 我突然想起他或许会帮忙。 It really matters that she hasn’t turned up. 她还没来，这的确很关键 2.whether 引导的主语从句 表达疑问概念，由原来的一般疑问句充当。 whether表示“是否”,有实际词汇意义，不可以省略 whether 引导的主语从句常位于句首，也可以用形式主语it,把真正主语后置 Whether we will attend the lecture has not been decided yet. 我们是否去听讲座还没有决定。 It makes no difference to me whether it rains or not. 下不下雨对我来说都没有区别。 如果用it作形式主语，则可以用if代替whether引导主语从句。 It makes no difference to me if it rains or not. 3.wh-word 引导的主语从句 表达相应的疑问概念，由原来的特殊疑问句充当。 从句使用陈述句语序 Who will take charge of this project has not been decided yet. 谁来负责这项工程还没有决定。 Whose handwriting this is has not been identified. 这是谁的笔记还没有确认。 What we should do next is not decided. 我们下一步该做什么还未作出决定。 Which report I should write first is a question. 我应该先写哪一份报告是个问题。 Why she left is a secret. 她为什么离开是一个谜。 4.疑问词+-ever引导的主语从句 whatever, whoever, whomever, whichever, whenever, wherever等 Whoever does best will get the prize. 谁做得最出色谁就得奖。 Whatever I have is yours. 我有的任何东西都是你的。 Whichever you want is yours. 你要哪一个，哪一个就是你的。 Summary 类别 规则 连接词 1.that：无词义，不充当成分，不可以省略 2. whether：表示“是否” 3.连接代词：who,whom, whose, what, which,whoever, whatever等 4.连接副词：when, where, why, how, however, wherever 等 语序 陈述语序（主语+谓语），不能倒装 主谓一致 主语从句作主语时，谓语动词通常用单数，若连接词what引导的从句表示复数概念，谓语可用复数 形式主语it it作形式主语，主语从句后置 it+be+adj./n+that从句 it+be+p.p+that从句 It+特定动词+that从句 (1) It is a truth that we should never judge a person by his or her appearance. (2) What we often fail to realize is that a person’s inner qualities are far more important than their outward looks. (3) For example, there are many people who seem ordinary at first glance but who possess extraordinary kindness and wisdom. (4) It is these qualities that truly define a person. (5) The person who has a beautiful heart is the one who is truly worthy of our respect and admiration. (6) Remember, it is not what is on the outside but what lies within that matters. 1.Please identify the subject clauses. Why subject clause? To introduce an abstract topic To stress important information To add expressiveness表现力 To make a transition more natural that whether/if what/who/whom/whose/which when/ where/ why/ how It is +n./adj./p.p+that clause It+vt./vi+ that clause Ma Xu, who is widely recognized as China’s first female paratrooper, is a figure whose life story continues to inspire many. What impresses me most are her courage, skill, and determination. Whether she could succeed as a paratrooper was questioned by many at the time. What she did next was learn parachuting in secret through hard training until she could jump as well as any other candidate. It was her perseverance that finally led to the success of her application. Over a period of 20 years, she completed more than 140 parachute jumps, which remains the highest number for any female paratrooper. She also set a national record as the oldest enlisted woman to perform a parachute jump at age 51. In 2018, Ma Xu donated her entire life savings to her hometown in Mulan County, a gift that was intended to support local education and public welfare. $