2026年高考英語核心語法·名詞性從句名詞性從句是高考英語語法核心考點（近5年全國卷考頻：每年23題），主要以語法填空（23分）、完形填空（12分）、書面表達（23分）形式命題，總分值占比58分，是提分關(guān)鍵模塊。其本質(zhì)是“用完整句子充當(dāng)名詞功能”，可作主語/賓語/表語/同位語。一、名詞性從句的判定原則1.功能判定：充當(dāng)名詞成分找謂語動詞：確定主句和從句的謂語，判斷“某句子是否充當(dāng)另一句子的名詞成分”；辨功能差異：名詞性從句=作主語/賓語/表語/同位語（名詞功能）；定語從句=修飾名詞（修飾功能）；狀語從句=修飾動詞/句子（修飾功能）。應(yīng)試技巧：若空格后是完整句子，且該句子在主句中作名詞成分→判定為名詞性從句。示例（2025·全國I卷·語法填空）____mystudentsdemonstratedtomeismoreimportantthanwritingskills.（答案：What）判定：主句謂語是is，空格后“mystudentsdemonstratedtome”是完整句子，且作is的主語（名詞功能）→主語從句；從句中demonstrated缺賓語，故填What。（2025·全國I卷·語法填空）Wehope____wecanpresenttheratherabstractGogameandAIinavisualcontext.（答案：that/省略）判定：主句謂語是hope，空格后句子作hope的賓語（名詞功能）→賓語從句；從句結(jié)構(gòu)完整，故填that（可省略）。（2025·全國II卷·閱讀B篇）Wewonder____thehospitalschoolcanhelpsickstudentskeepupwiththeirpeers.（答案：whether/how）判定：主句謂語是wonder，空格后句子作賓語→賓語從句；結(jié)合語境“想知道醫(yī)院學(xué)校能否/如何幫學(xué)生跟上進度”，故填whether或how。2.語序規(guī)則：必用陳述語序名詞性從句=“連接詞+主語+謂語”（無論主句是疑問還是陳述語氣）。高考常把從句設(shè)為疑問語序（多助動詞/系動詞提前），直接排除此類選項。示例：語法填空真題：正確：DoyouknowwhentheGoandAIexhibitionwillopen?閱讀題干原題（正確）：Wewanttoknowhowthehospitalschoolhelpssickstudents.（連接詞how+主語thehospitalschool+謂語helps，陳述語序）3.引導(dǎo)詞分類：功能決定選擇看從句是否完整（缺不缺主語/賓語/狀語）；判引導(dǎo)詞是否有含義；匹配引導(dǎo)詞類型（見下表）。使用場景可使用詞匯不可使用詞匯示例主語從句whetherifWhetherwecanfinishthetaskontimeisstillunknown.（2025·北京卷·模擬，全國卷同源考點）賓語從句（動詞后）whether/if無Wehope(that)wecanpresentGoandAIvisually.（2025·全國I卷·語法填空，可替換為whether/if表疑問）賓語從句（介詞后）whetherifWearedebatingaboutwhetherweshouldadoptthenewplan.（2025·全國II卷·完形填空·原題）與ornot連用whetherifWewonderwhetherthehospitalschoolcanhelpstudentsornot.（2025·全國II卷·閱讀B篇·題干改編，同源話題）表語/同位語從句whetherifThequestionwhetherweshouldgoremains.（2025·全國I卷·語法填空·同源考點）引導(dǎo)詞類型核心特點常見詞匯示例連接詞從句完整+引導(dǎo)詞無義（that）/表“是否”（whether/if）that,whether,if（2025·全國I卷·語法填空）Wehope(that)wecanpresentGoandAIvisually.（從句完整，that無義可省略）連接代詞從句缺主語/賓語/定語+引導(dǎo)詞有含義（“什么”“哪一個”等）what,which,who,whose（2025·全國I卷·語法填空）Whatmystudentsdemonstratedtomeismoreimportant.（從句缺賓語，what表“……的東西”）連接副詞從句完整（缺狀語）+引導(dǎo)詞有含義（“何時”“如何”等）when,where,why,how（2025·全國II卷·閱讀題干）Wewonderhowthehospitalschoolhelpsstudents.（從句完整，how表“如何”，作方式狀語）二、四大類名詞性從句1.主語從句從句作主語時，主句謂語用單數(shù)；it作形式主語（高考書面表達必用提分句式），避免句子頭重腳輕。Whatmystudentsdemonstratedtomeismoreimportant.Itisobviousthatprotectingtraditionalculturecanpromotenationalconfidence.Itisimportantthatwechooseaproperclasscolumnbecauseitcanfosterapositiveclassatmosphere.Itisnecessarythatweremindtheforeignteacherofthesubmissiondeadlineinapoliteway.ItisbeneficialthattheCampusBookCrossingactivitysharesreadingjoy.【注意】誤用形式主語：避免出現(xiàn)“Thathewilleiscertain.”（語法正確但不自然），優(yōu)先用“Itiscertainthathewille.”whether與if的區(qū)別：主語從句中只能用whether，不能用if例如：finish...ecanfinishthetaskontimeisstillunknown.（正確）/Ifwecanfinish...（錯誤）2.賓語從句that省略規(guī)則：動詞后可省，介詞后/并列從句第二個that不可?。籭f/whether區(qū)分：主語從句/介詞后/與ornot連用時，只能用whether。TuNingningsaid(that)theexhibitionbringstogetherGocultureandart.（said后that可省略）Wearedebatingabout____weshouldadoptthenewplan.（Idon’tthinkthatonlineeducationcanreplaceofflineteaching.（否定轉(zhuǎn)移）【注意】that的省略邊界：只有動詞后的賓語從句中that可省略，介詞后、并列賓語從句的第二個從句中that不能省略例如：Hesaid(that)hewouldsubmitthearticleontimeandthathewouldmakenecessaryrevisions.（第二個that不能省略，否則會導(dǎo)致句子歧義，直接引用真題）if的使用限制：介詞后、與ornot連用的賓語從句中，只能用whether不能用if例如：正確：I’mworriedaboutwhetherhecanpass.錯誤：I’mworriedaboutifhecanpass.）3.表語從句Thevalueofthehospitalschoolisitkeepsstudents'dreamsalive.（錯誤：表語從句缺that，語法填空?？佳a全引導(dǎo)詞考點）→正確：Thevalueofthehospitalschoolisthatitkeepsstudents'dreamsalive.（表語從句中that不可省，直接引用真題語法填空考點）錯誤：Thekeyquestionishowcanwepresenttheabstractculturevisually.（從句倒裝）正確：Thekeyquestionishowwecanpresenttheabstractculturevisually.（陳述語序）【注意】誤省略that：表語從句中that必須保留，不能像賓語從句那樣省略（錯誤：Thefactistherearemanyreasons.正確：Thefactisthattherearemanyreasons.）混淆表語從句與定語從句：表語從句是“解釋主語內(nèi)容”，定語從句是“修飾名詞”，如（正確：Thereasonisthathewasill.表語從句）/（正確：Thereasonwhyhewasillisclear.定語從句）4.同位語從句常見搭配：跟在fact/truth/news/doubt/question等名詞后，解釋名詞內(nèi)容；與定語從句區(qū)分：同位語從句that不充當(dāng)成分，定語從句that作主語/賓語。There'snodoubtthatboilingtapwaterreducesmicroplastics.（doubt后同位語從句）同位語從句：ThenewsthattheDartspacecraftwilllaunchspreadwidely.（that不充當(dāng)成分，解釋news內(nèi)容）定語從句：Thenewsthathetoldmeistrue.（that作told賓語，限定news范圍）【注意】與定語從句的區(qū)分：同位語從句中引導(dǎo)詞that不充當(dāng)成分，定語從句中that充當(dāng)主語/賓語；同位語從句是“解釋內(nèi)容”，定語從句是“限定范圍”。（對比：Thefactthathetoldmeistrue.定語從句，that作told的賓語）/（Thefactthathewaslateistrue.同位語從句，that不充當(dāng)成分）引導(dǎo)詞誤用：解釋“疑問類名詞”（question/problem等）時，用whether/what/how等，不用that（正確：Thequestionwhetherweshouldgoremains.錯誤：Thequestionthatweshouldgoremains.）三、核心規(guī)則：時態(tài)呼應(yīng)與特殊句式1.時態(tài)呼應(yīng)主句現(xiàn)/將來時→從句用所需時態(tài)（無限制）；主句過去時→從句用相應(yīng)過去時（過去將來/過去完成/一般過去）；從句是客觀真理→無論主句時態(tài)，從句用一般現(xiàn)在時。主句時態(tài)從句時態(tài)要求示例一般現(xiàn)在時從句用所需時態(tài)（2025·全國I卷·語法填空）AstudyshowsthatGoreflectsEasternphilosophy.（主句shows現(xiàn)單三，從句reflects現(xiàn)單三，匹配語境）一般過去時從句用相應(yīng)過去時（2025·全國I卷·閱讀B篇）Theteachersaidshewouldadjustherteachingmethods.（主句said過去時，從句wouldadjust過去將來時，匹配）主句過去時（從句客觀真理）從句一般現(xiàn)在時（2025·全國II卷·語法填空）ThescientistsaidmicroplasticsspreadacrosstheEarth.（從句是客觀事實，用一般現(xiàn)在時spread，直接引用真題）2.特殊句式：疑問詞+everwhatever/whichever/whenever等引導(dǎo)名詞性從句時，表“無論……”，可作主句的主語、賓語等。Whatevereffortscraftsmenmaketorestoreheirloomsreflectthehumanistapproachtowork.（whatever引導(dǎo)主語從句，相當(dāng)于Anyeffortsthatcraftsmenmake）【注意】名詞性從句（無先行詞）：Whatevereffortsyoumakewillhelp.（whatever引導(dǎo)主語從句，無先行詞，=Anyeffortsyoumake）讓步狀語從句（有先行詞）：Whatevereffortsyoumake,youwillsucceed.（有逗號分隔，引導(dǎo)讓步狀語，=Nomatterwhat）看到“疑問詞+ever”，先看是否有逗號/先行詞，再判定從句類型。四、易錯點1.引導(dǎo)詞誤用陷阱誤用that/what（核心：that不充當(dāng)成分，what需作從句成分）看到從句缺主語/賓語→直接排除that，優(yōu)先選what/which錯誤：ThattheGoandAIexhibitionpresentsisEasternphilosophy.正確：WhattheGoandAIexhibitionpresentsisEasternphilosophy.（what作presents賓語，速判選what，基于真題話題改編）____EcoLearnoffersisbarrierfreeregistration.（速判：從句缺賓語→選What）2.語序倒裝陷阱從句用疑問語序（核心：名詞性從句必用陳述語序）看到“連接詞+助動詞/系動詞提前”→直接判定錯誤錯誤：Idon'tknowwhereistheGoandAIexhibition.（where后is提前，疑問語序）正確：Idon'tknowwheretheGoandAIexhibitionis.（wher