主语从句表语从句结构-2025-2026学年高中英语必修三句型真题直击（北师大版）

高中必修第三册北师大版 【句型专版】 Why we do sth.is that... 高中专版 句型真题直击Vhy we do sth.is that. 高中口北师大版口必修第三册 句型结构 Why we do sth.is that.. 含义：表示”我们做某事的原因是…”，Why引导主语从句表示原因，is后接hat引导的表语从句说 明具体原因。 直击真题高效讲 真题1（单项选择口月考真题) we learn English is it helps us communicate with people around the world. A.Why;that B.How;because C.What;whether 答案：A 核心知识点： 1.句型结构考点：Wy引导主语从句表示”做某事的原因”，is后接that引导的表语从句说明具体 原因，符合Why we do sth.is that.”结构。 2.含义匹配：问句询问学习英语的原因，答句用that引出具体理由，逻辑连贯。 3.干扰项排除：how(如何)询问方式，what(什么)询问内容，均与”原因”主题不符；because 不能引导表语从句，whether表示？是否”含义不匹配。 真题2（句型转换☐期中真题) We study hard because we want to enter good universities.（用'Why.is that..”结构a改写句子) 答、：hy we study hard is that we want to enter good universities.. 核心知识点： 1.结构转换考点：将原因状语从句beca1se.”转换为”主语从句Why.+表语从句hat.”结构，保 持原句因果逻辑不变。 2.语序调整：原句主句We study hard'作为主语从句内容，用Why引导：原因部分"we want to 1 高中必修第三册北师大版 【句型专版】 Why we do sth.is that... enter good universities”用that引导作表语。 真题3（完成句子☐期末真题） 我们努力工作的原因是我们想让家人过上更好的生活。 we work hard we want to make our family live a better life. 答案：Why;is;that 核心知识点： 1.汉译英结构考点：中文.的原因是.”对应英文Why.is that..”结构，需按Why+主语从句+ is+hat+表语从句”顺序排列。 2.逻辑连接：确保主语从句（努力工作）与表语从句（让家人过好生活）构成因果关系，ht不可 省略。 真题4（判断改错☐月考真题） Why he late for class is because the traffic was heavy.(找出错误并改正) 答案：将because改为that 核心知识点： 1.句型结构易错点：Why..is that.”为固定结构，表语从句需用that引导，不可用because。because 引导原因状语从句，不能作表语从句连接词。 真题5（语篇填空☐期中真题片段） Many students wonder about the purpose of learning history. we learn history is helps us understand the past and avoid repeating mistakes. 答案：Why;that 核心知识点： 1.语篇逻辑考点：前文”wonder about the purpose”提示后文需解释原因，用Why.is that..”结构衔 接上下文，符合因果逻辑。 2.语法规则：主语从句由Why引导，表语从句由ht引导，构成完整的主系表结构。 真题6（用所给词的适当形式填空口期末真题） Why she (choose)to study abroad is that she wants to experience different cultures. 高中必修第三册北师大版 【句型专版】 Why we do sth.is that... 答案：chooses 核心知识点： 1.时态主谓一致考点：主语从句Why she chooses to study abroad'中，主语he为第三人称单数， 一般现在时谓语动词用三单形式chooses。 2.句型结构要求：主语从句需用陈述语序，时态与主句（一般现在时s)保持一致。 真题精准训练 一、 单项选择（考查句型结构+含义匹配） y they moved to the city is they wanted to find better jobs. A.Why;that B.How;because C.What;whether 2 we learn math is it develops our logical thinking. A.When;if B.Why,that C.Where;because 3. he refused the offer is still unknown. —Maybe he has found a better opportunity. A.How;because B.Why;that C.What;whether 二、用所给词的适当形式填空（考查时态主谓一致） 1.Why she (collect)stamps is that she enjoys the stories behind them. 2.Why they (build)the new park is that the old one is too small. 3.Why Tom (study)French is that he plans to work in Paris. 4.Why we (hold)the meeting yesterday is that we needed to discuss the project 三、句型转换（考查结构改写) l.She practices dancing because she wants to join the school team.(用Why.is that.”结构改写) 2.They save money because they aim to buy a new house.(用'Why.is that..”结构改写) 四、完成句子（考查汉译英） 3 高中必修第三册北师大版 【句型专版】 Why we do sth.is that... 1.他每天早起的原因是他要锻炼身体。 he gets up early every day he wants to exercise. 2.我们学习科学的原因是它帮助我们理解自然现象。 we study science it helps us understand natural phenomena 五、语篇填空（选自期末真题） 阅读短文，用括号内单词的适当形式填空或根据句意填空，使短文通顺。 Many people ask about the importance of reading.1. we read widely is 2. it opens up new worlds for us.A student once said,"Why I 3. (love)reading is that each book tells a different story."Both adults and children 4. (benefit)from reading,as it enriches our knowledge and improves our language skills. 参考答案 一、 单项选择 1.A2.B3.B 二、用所给词的适当形式填空 1.collects 2.are building 3.studies 4.held 三、句型转换 1.Why she practices dancing is that she wants to join the school team. 2.Why they save money is that they aim to buy a new house. 四、完成句子 1.Why;is;that 2.Why;is;that 五、语篇填空 1.Why 2.that 3.love 4.benefit