【新教材】2026年人教版九年级上册英语 Unit 3 Smart Learning 语法精讲与精练（含答案）

第第页【新教材】2026年人教版九年级上册英语Unit3SmartLearning语法精讲与精练本单元核心语法：宾语从句（that/if/whether/wh-词引导）；The+比较级,the+比较级；不定式作主语。一、宾语从句（that/if/whether/wh-词引导）【核心规则】宾语从句三要素：①引导词②语序③时态。原句类型引导词说明例句陈述句thatthat无词义，口语中可省略Ithink(that)smartlearningisimportant.一般疑问句if/whether意为"是否"，不可省略Iwonderif/whetherthismethodworks.特殊疑问句wh-词（what,who,when,where,why,how等）保留原疑问词，有词义CanyoutellmehowIcanimprovemyEnglish?【重点】【语序规则】宾语从句必须使用陈述语序！即主语+谓语，不能使用疑问语序（不能把助动词/情态动词/be动词放在主语前面）。【易错点】宾语从句时态呼应规则：①主句为现在时态（一般现在时/现在完成时），从句可根据实际需要用任何时态；②主句为过去时态，从句须改为对应的过去时态（一般过去→过去完成；现在进行→过去进行；一般将来→过去将来）；③客观真理永远用一般现在时，不受主句时态影响。【whether与if的区别】以下情况只用whether不用if：①后有ornot；②作介词宾语；③在不定式前（whethertodo）；④从句位于句首。例11Idon'tknow______hewillcometomorrow.______hecomes,I'lltellyou.A.if;WhetherB.whether;IfC.if;ThatD.that;If【解析】第一空：宾语从句表"是否"，用whether或if均可。第二空：此处是条件状语从句"如果他来"，只能用If（条件状语从句不用whether）。综合判断选B。【答案】B例12Couldyoutellme______?A.whereisthepostofficeB.wherethepostofficeisC.wherewasthepostofficeD.thepostofficeiswhere【解析】宾语从句必须用陈述语序（主语+谓语），排除A、C。D项语序混乱。正确语序为wherethepostofficeis（where+主语+谓语）。【答案】B例13Ourteachersaidthattheearth______aroundthesun.A.movedB.movesC.wasmovingD.hadmoved【解析】宾语从句表示客观真理时，无论主句什么时态，从句都用一般现在时。"地球绕着太阳转"是客观真理，用moves。【答案】B【专项练习】40.Ibelieve______smartlearningcanhelpusstudybetter.【答案】that41.Iwonder______thislearningmethodiseffectiveornot.（用whether/if）【答案】whether42.Canyoutellme______?A.howcanIimprovemyEnglishB.howIcanimprovemyEnglishC.howIcanimprovedmyEnglishD.howimprovemyEnglish【答案】B43.Sheaskedme______Ihadfinishedmyhomework.【答案】if/whether44.Theteachertoldusthatthesun______(rise)intheeast.【答案】rises45.Idon'tknow______tochoose.（用whether...ornot结构）【答案】whether46.Heasked______thelibrarywasopenonweekends.A.thatB.ifC.whatD.which【答案】B47.Tomsaidhe______(go)tothemuseumthenextday.【答案】wouldgo二、The+比较级,the+比较级（越……，越……）【核心规则】"The+比较级(+主语+谓语),the+比较级(+主语+谓语)"表示"越……，就越……"。两个比较级前都要加the。【重点】常用句型：Themoreyoupractice,thebetteryourEnglishwillbecome.（你练习得越多，你的英语就会越好。）例14______youread,______youwillunderstand.A.Themore;thebetterB.More;betterC.Themore;betterD.More;thebetter【解析】The+比较级,the+比较级结构中，两个比较级前都要加the。read的比较级是more（因为read是动词，用more修饰），understand的比较级是better。【答案】A【专项练习】48.______(much)youlearn,______(wise)youwillbecome.【答案】Themore;thewiser49.______(careful)youare,______(few)mistakesyouwillmake.【答案】Themorecareful;thefewer50.Theharderyouwork,______(good)resultsyouwillget.【答案】thebetter51.______youpractice,______yourspokenEnglishwillbe.A.More;betterB.Themore;thebetterC.Themore;betterD.More;thebetter【答案】B三、不定式作主语【核心规则】动词不定式（todo）作主语时，谓语动词用单数。常用句型：Itis+adj.+(forsb.)+todosth.（it为形式主语，不定式为真正主语）。例15Itishelpful______(review)whatyouhavelearnedeveryday.【解析】不定式作真正主语，it为形式主语。review的不定式形式为toreview。句意：每天复习所学内容是有帮助的。【答案】toreview【专项练习】52.______(take)notesinclassisveryimportantforourstudy.【答案】Taking/Totake53.Itisnecessary______us______(set)goalsbeforewestartlearning.【答案】for;toset54.______(read)aloudeverymorninghelpsimproveyourpronunciation.【答案】Reading/Toread【Unit3综合练习】55.Ithink______agoodlearningmethodisthekeytosuccess.【答案】that56.Couldyoutellme______thelibraryclosesonweekends?A.whendoesB.whenC.whendidD.whenis【答案】B57.Theteachersaidthatlight______(trave