重点语法 Unit1 （解析版） 2021-2022 学年高二英语下册链接教材精准变式练（人教版 2019） 教材重点语法知识链接及典例解读 表语从句 用适当的连接词完成下面教材中的句子并体会它们的语法 1.One theory was ___________________bad air caused the disease. 2.Another was ____________cholera was caused by an infection from germs in food or water. 3. The truth was__________the water from the Broad Street pump had been infected by waste. 4. What John Snow showed to the world was________________cholera could be overcome. 【答案解析】1.that 2.that 3.that 4.how 表语从句 1.含义∶在句中充当表语的从句称为表语从句。这种从句往往进一步对主句的主语进 行解释说明。 2.引导表语从句的连接词有连接代词（what，who，whom，whose，which），连接副 词（when，where，how，why 等）以及 that，whether，as if/as though，because 等。 （1）that 引导表语从句 that 引导表语从句时仅起连接作用，无任何意义，在从句中不作任何成分，通常不可 省略。 The general rule is that mild zones have relatively few languages, often spoken by many people,while hot,wet zones have lots，often spoken by small numbers.一般的规则是，（气 候）温和的地区语言种类相对较少，通常说这些语言的人很多，而炎热、潮湿的地区语言 种类很多，通常说这些语言的人很少。 语法填空 1.（2020·浙江 1 月阅读理解七选五改编）The truth is____________we are lucky enough to have clean water whenever we want, but this is not the case for many people around the world. 2.（江苏高考任务型阅读改编）Another unique human characteristic is_________we walk upright. 【答案解析】1.that。此处表示真相是我们足够幸运，只要我们想要，无论什么时候都有 干净的水。分析句子结构可知，"we are lucky…around the world"为表语从句，该从句不缺成 分，且意义完整，故用 that 引导。2.that。句意∶人类的另一个独特特征是我们直立行走。空 处引导表语从句，只起连接作用，无具体含义，故填 that。 （2）whether 引导表语从句 whether 引导表语从句时起连接作用，意为"是否"，但在从句中不作任何成分。注意 if 不 能引导表语从句。 The question is whether we can rely on him.问题是我们能否信任他。 真题链接语法填空 （江苏高考 阅读理解改编）The question，however，is______________this is what the developing countries need the most. 【答案解析】 whether。句意∶然而，问题是，这是否是发展中国家最需要的。分析句子 结构可知，空处引导的是表语从句，再根据主句中的 question 可知，此处表示"是否"，故填 whether。 （3）as if/as though/because 等引导表语从句 as if/as though 引导的表语从句常置于系动词 look，seem，sound，be，become 等后面。 because 引导的表语从句常见于"This/That/It is/was because.."句型中。 It looks as if the coming autumn harvest will be even better than the last one. 看起来好像即将来临的秋收甚至比去年还好。 >I seems as though he doesn't know the answer.看起来他好像不知道答案。 He was sent to the hospital.That's because he was ill.他被送到医院，那是因为他病了。 真题链接 语法填空 （安徽高考单项填空改编）From space，the earth looks blue. This is__________about seventy-one percent of its surface is covered by water. 【答案解析】because。句意∶从太空中看，地球看起来是蓝色的。这是因为地球表面约 71%都被水覆盖着。This 表示结果，is 后面的表语从句表示原因，故填 because。 （4）连接代词引导表语从句 连接代词 what，who，whom，whose，which 等引导表语从句时，除在句中起连接作用 外，在从句中还可充当主语、表语、宾语等成分。 "Every time you eat a sweet,drink green tea." This is what my mother used to tell me."每次吃甜 食时要喝绿茶。"这是我妈妈过去常常告诉我的。 The problem is who is really fit for the hard job.问题是谁才真正适合做这份艰苦的工作。 真题链接 语法填空 1.（北京高考单项填空改编）This is _____________ my father has taught me — to always face difficulties and hope for the best. 2.（安徽高考单项填空改编）A ship in harbor is safe，but that's not_____________ships are built for. 【答案解析】】1.what。句意∶这是我父亲教我的—总是直面困难，并抱最好的愿望。空 处引导表语从句，且从句中 taught 后缺宾语，表示"……的东西"，故用 what。句中的 to always face difficulties and hope for the best 是 what 指代的内容。 2.what。句意∶船在港口里是安全的，但那不是建造船的目的。空处引导的是表语从句， 且从句中的介词 for 缺少宾语，what….for 表示"为何目的，为何理由"，故用 what。 （5）连接副词引导表语从句 连接副词 where，when，why，how 引导表语从句时，除在句中起连接作用外，在从句中 还分别充当地点、时间、原因、方式状语。 》That's where I can’t agree with you.那是我不同意你的地方。 The last time we had great fun was when we were visiting the Water Park. 我们上一次玩得很开心是我们参观水上公园的时候。 >Sara was caught in a traffic jam this morning. That is why she was late for class.萨拉今天早 上遇到了堵车，那就是她上课迟到的原因。 语法填空 1（2020·全国Ⅱ卷语法填空改编）Chinese New Year is a celebration marking the end of the winter season and the beginning of spring. This is____________decorating with plants,fruits and flowers carries special significance. 2.（江苏高考单项填空改编）By boat is the only way to get here, which is_________we arrived. 【答案解析】 1.why。根据语境及句子结构可知，空处应用 why 引导表语从句，why 在从句中作原因状语。 2.how。根据 By boat 和 arrived 可知，此处指方式，故填 how。 一．用适当的连接词完成句子 1.Luck is _____________happens when preparation meets opportunity. 2.—Children's behaviour is most easily influenced by their parents. —True. That's______________we should set a good example to our kids. 3.Look at her face. She seems____________ she had done a great thing. 4.Our country is developing at an amazing speed,which is____________makes me feel so proud. 5.The traditional view is________________we sleep because our brain is"programmed" to make us do so. 6.（2021·天津市耀华中学期末）—Do you think it is wise for Chinese mothers to try to do everything for their children? —No, that's_____________________they are mistaken. 7.The best moment for the football star was_____________he scored the winning goal. 8.What the doctor