专题09名词性从句专讲专练-2023年高考英语二轮复习重点难点、易混易错、一网打尽之策略（全国版）

专题09名词性从句专讲专练 【考点研析】 考点一 主语从句 1.主语从句的引导词 引导词 作用 连接词 that, whether. if在从句中作成分只起连接作用，不 what，who,whom, 在从句中作主语、 连接代词 which, whichever,…… 宾语、表语或定语 whatever,whoever 连接副词when，where.how，why 在从句中作状语 When the delayed flight will take off depends much on the weather. 延迟的飞机何时起飞在很大程度上取决于天气。 Where Professor Han was born is known to the public.韩教授出生的地方人人皆知。 What struck me most in the movie was the father's deep love for his son. 影片中最打动我的是父亲对儿子深深的爱。名师指津 (1)that引导主语从句时一般不省略。 That they were in truth sisters was clear fror the facial similarity between them.从她们的面相似度就能清楚地看出她们是亲姐妹。(2)whether与引导主语从句的区别: 主语从句位于主句的谓语动词前，表示“是否只能用 whether 而不能用if引导;若用it作形主语，则if与whether可互换。 Whether we can have clean drinking water lies what effective measures will be taken byt government about water pollution. 我们能否有干净的饮用水在于政府将采取什样的有效措施处理水污染问题。 多维讲练 It remains to be seen whether/if this idea can be put into practice. 这一想法能否付诸实施还有待观察。 2.形式主语 it作形式主语的常见句型: (1)It+be+形容词(necessary/likely/important/ certain等)+that从句 (2)It+be+名词(短语)(a pity/a shame/no wonder等)+that从句 (3)It+be+过去分词(said/told/reported等)+ that从句 (4)It+不及物动词(seem，appear，happen, matter等)+that从句 It is uncertain what side effect the medicine will bring about, although about two thousand patients have taken it. 尽管大约两千名患者已经服用了这种药,但是它会带来什么样的副作用还不清楚。 It doesn't matter whether you pay by cash or credit card in this store.在这个商店里你用现金支付还是信用卡支付都没有关系。 考点二 表语从句 1.表语从句的引导词 只起连接作用，不在从句中作成分 连接词that，whether 连接代词what, who, whom, which, 在从句中作主语 whichever,whatever,whoever 宾语、表语或定语 连接副词 when, where, how, why 在从句中作状语 The most important result for the user is that the product does what is intended. 对用户来说最重要的是产品达到了预期的效果。 This is where we usually think it's easier to just give up. 这就是我们通常认为更容易放弃的地方。 名师指津 if不能引导表语从句;that引导表语从句时不能省略。 2.as if/as though引导表语从句 as if/as though 意为“好像,仿佛”，引导的表语从句常跟在系动词(如 seem，appear，look，taste, sound，feel，smell等)之后。若表语从句所述的是非真实的情况，从句用虚拟语气;若所述的是事实或是极可能发生的情况,从句用陈述语气。 The thick smog covered the whole city. It was as if a great black blanket had b