As to understand how...-2025-2026学年高中英语选修四句型易错点精讲（沪外版）

选择性必修第四册沪外版 【寒假专版】 B版句型易错点精讲 寒假专版 【B版句型易错点精讲】As,… understand how... 高中·沪外版·选择性必修第四册 句型结构：As,,understand how.… 易错点1：主从句时态不一致导致逻辑矛盾 核心知识点： s意为“随着当…时”时，主从句时态需呼应（如主现从现、主过从过，或主句用现在 完成时/将来时，从句用一般过去时/现在时表背景)。 典型例句对比： 典型错误：As technology develops,.we will understand how it changed our lives.(×) 正确表达：As technology develops,.we will understand how it changes our lives..(√) 真题链接（沪外版高中选择性必修第四册同步练习）： Asthe research. (progress),scientists (understand)how climate affects ecosystems better. 答案：progresses,will understand 解析：s引导时间状语从句表“随着”，从句用一般现在时表正在进行的客观过程，主句用 将来时表结果。 易错点2：从句主语缺失或逻辑主语与主句不一致 核心知识点： s引导从句时需包含完整主语和谓语：若为主句的非谓语结构（如分词短语），其逻辑主语 需与主句主语一致。 典型例句对比： 典型错误：As growing up,we understand how parents care for us.（x) 正确表达：As we grow up,we understand how parents care for us..(√) 选择性必修第四册沪外版 【寒假专版】 B版句型易错点精讲 真题链接（沪外版高中选择性必修第四册基础训练）： As (learn)more about history,we begin to understand how ancient civilizations influenced modern society. 答案：we learn 解析：s引导时间状语从句，需补充主语“we”,与主句主语一致，避免逻辑主语混乱。 易错点3：how引导的宾语从句中语序错误 核心知识点： how在宾语从句中需用陈述语序（主语+谓语），而非疑问语序（助动词+主语+谓语）。 典型例句对比： 典型错误：As we practice,we understand how can we improve skills.(x) 正确表达：As we practice,.we understand how we can improve skills..(√) 真题链接（沪外版高中选择性必修第四册单元检测）： -As students,do you understand how (solve)this math problem? -Yes,through teamwork and careful analysis. 答案：to solve 解析：“how+不定式”作understand的宾语，相当于“how we can solve”,符合陈述语序要 求。 易错点4：as的多义混淆 核心知识点： s可表“随着（时间）”“当…时（时间）”“因为（原因）”，需根据语境区分；表原因 时，从句需与主句存在明确因果逻辑，避免与时间状语混淆。 典型例句对比： 典型错误：As it was raining,we understand how important umbrellas are.(×) 正a确表达：As it rained heavily,we understood how important umbrellas are.（√) 例句对比： 选择性必修第四册沪外版 【寒假专版】 B版句型易错点精讲 As she explained the theory,we understood how it worked.(as表时间：当她解释时) As she had studied the theory,we understood how it worked..(as表原因：因为她研究过，所以我们理 解了) 句型易错点精准训练 一、 单项选择（考查s引导时间状语从句及时态呼应） 1.As the sun the birds start to sing. A.rises B.rose C.will rise 2.We better results as we harder A.get;work B.will get;work C.get;will work 3.AsI the book,I understood how interesting history is. A.read B.am reading C.will read 二、用所给单词的适当形式填空（考查s从句主语及宾语从句语序） 1.As (grow)older,we learn to take care of ourselves. 2.Could you tell me how _(improve)my English speaking skills? 3.As the wind (blow),the leaves fall from the trees quietly. 三、改正句子中的错误（考查s多义及从句时态） 1.As it rains,we will know how important umbrellas are. 2.As we study,we understand how can we remember new words. 3.As a child,my mother taught me how to cook. 四、语篇填空（选自沪外版高中选择性必修第四册同步练习） As technology 1. (develop),our lives 2. (change)a lot.Many students now use 选择性必修第四册沪外版 【寒假专版】 B版句型易错点精讲 e-books.As they 3. (read)online,they learn how 4. (find)useful information quickly.Teachers say it's important to understand how 5. (balance)screen time and real-life communication.Both students and parents 6. (realize)the value of digital learning. 参考答案 I.单项选择 1.A2B3.A Ⅱ，用所给单词的适当形式填空 1.we grow 2.to improve 3.blows ⅡI改正句子中的错误 1.As it rains,we know how important umbrellas are.As it will rain,we will know how important umbrellas are. 2.As we study,we understand how we can remember new words. 3.As I was a child,my mother taught me how to cook. V.语篇填空 1.develops 2.will change 3.read 4.to find 5.to balance 6.realize