英検準1級の長文4択ひっかけ対策｜some・all・may・因果の独自24問と誤答72解説

英検準1級の長文内容一致で「本文は理解しているのに4択で失点する」ときは、選択肢が元の英文より強く言いすぎていないかを調べてください。例えば本文の some residents may benefit に対して all residents will benefit は、someをall、mayをwillへ変えており同じ意味ではありません。現在の準1級では長文内容一致7問・長文語句空所補充6問が出題されます。英検協会の公式試験内容を確認しています。

慶英会では6種類の誤答パターン、各2題の独自英文・合計12パッセージ、4択24問、全解答と誤答理由72件、段落の根拠を探す練習、14日間の復習プログラムを無料公開します。内容一致の設問を解く際、知らない単語の数だけでなく、数量・断定・因果・時間・適用条件・行動主体を検証しましょう。

本記事の位置付け：24問は練習量を増やした慶英会独自問題で、正式な7問という出題数や本番の文章量を再現する模試ではありません。文章に出てくる学校・施設・調査は教材のための架空事例です。

慶英会・関連する英検準1級の無料教材：長文4択で見抜く数量の限定36問。本文の名詞・数量・根拠を実際に言い換え、初見問題へ応用できるか確かめましょう。

英検準1級・続けて解く無料教材：What・Why・How・Inferenceの設問24問。慶英会の独自問題・全解答を使い、初見でも同じ考え方を使えるか確認しましょう。

準1級の関連無料教材：修理か買替えかの根拠・条件を検証する4技能演習。原文の意味を保ったまま要約・意見・リスニング・4コマ面接へ発展させます。

慶英会の準1級・追加無料教材：必要条件を逆転させない独自36問。本文の根拠を確認し、独自問題と解答で初見の英文へ応用しましょう。

英検準1級・慶英会の関連無料演習：長文の発言者・研究者・行政・筆者を区別する24問。独自問題と解答を使い、初見の場面でも学習した技能を再現できるか確認しましょう。

英検準1級の長文演習：4択の誤答分析から進む筆者の立場24問・誤答72件。慶英会の独自8長文・全解答で、本文の限定的な主張と選択肢の断定を区別できます。

英検準1級の追加無料教材：4択の％ポイント・割合・平均の誤りを防ぐ24問。慶英会の独自問題と全解答を使い、初見の英文でも同じ解き方ができるか確認しましょう。

準1級のほかの教材を見る：長文・語彙・英作文など準1級無料教材42記事。慶英会独自の設問と全解答を、本人の苦手な技能から選べます。

目次：誤答6パターン／独自12英文と24問／全解答と誤答分析／14日間の復習／FAQ。

英検準1級の4択で見抜く6つの誤答パターン

• 数量の過大化：some → all、a few → most、120人の回答 → 市内全員の意見。
• 可能性の断定：may / might / could → will / always / certainly。
• 因果の混同：関連している／同時期に起きた → AがBを引き起こしたと断定。
• 変更前後の逆転：当初の日時・予定と、修正後の日時・予定を取り違える。
• 条件の見落とし：年齢・申込期限・監督者・費用など、一つでも必須条件を落とす。
• 主体と役割のすり替え：研究者が提案したことを、自治体が決定したと読み替える。

判断手順は、選択肢の主語・動詞・数量・確実性を本文の対応箇所へ戻し、同じかどうか確認することです。同じ単語が使われている選択肢が正答とは限りません。

慶英会独自12パッセージ・4択24問

初回は英文と選択肢を読んで正答を選び、本文の根拠を指で示せるか確認しましょう。解答は後半にまとめています。

パッセージ1｜数量の過大化：市内の自転車置き場と小規模調査

英文：A town surveyed 120 commuters who used its main railway station. About one third said they would consider cycling more often if secure bicycle parking were available. The survey included volunteers who responded online, so officials warned that it might not represent every resident. The town will test one parking facility before deciding whether to add others.

独自Q1｜What does the survey suggest?

• A. Some respondents might cycle more with secure parking.
• B. All residents will stop driving.
• C. Most of the entire town already cycles.
• D. Parking facilities are guaranteed to reduce traffic.

独自Q2｜Why are officials cautious about applying the results citywide?

• A. The survey included every person living in the town.
• B. No commuters responded to the survey.
• C. Participants were self-selected and may not represent all residents.
• D. Secure parking is illegal in the town.

パッセージ2｜数量の過大化：授業後の学習ルームと一部の利用者

英文：A secondary school opened a quiet study room on two afternoons each week. Several students reported that the space helped them finish assignments, but others rarely used it because they had sports activities. Teachers did not claim that the room improved grades for the whole school. They plan to gather more feedback and adjust the opening hours before expanding the service.

独自Q3｜Which result was reported?

• A. Every student improved examination scores.
• B. No students used the room because of sports.
• C. The room is open every afternoon.
• D. Some students found the room helpful for assignments.

独自Q4｜What will the teachers do before expansion?

• A. Make the room compulsory for everyone.
• B. Collect additional feedback and review the schedule.
• C. Permanently close the room immediately.
• D. Assume that all students prefer the current hours.

パッセージ3｜可能性の断定：都市の緑化と暑さの軽減

英文：Urban planners are testing additional shade trees along two streets. The new planting may reduce direct sunlight for pedestrians as the trees grow, but the size of any temperature change is not yet known. Water availability and maintenance could also influence the results. The city has not decided whether to plant trees along every major road.

独自Q5｜What is a possible benefit of the project?

• A. Temperatures have already fallen in every district.
• B. Pedestrians may receive more shade as the trees mature.
• C. New planting will eliminate summer heat.
• D. The city has committed to planting every road.

独自Q6｜What remains uncertain?

• A. Whether the project is already operating on two streets.
• B. Whether pedestrians exist in the area.
• C. Whether all trees must be removed next year.
• D. How much the trees will affect temperature under local conditions.

パッセージ4｜可能性の断定：オンライン講座の長期的な効果

英文：A community center introduced short online lessons for adults learning to manage digital documents. Attendance increased during the first month. Organizers hope that the format will help more people develop useful skills, but they have not yet measured performance on unfamiliar tasks. They plan to assess practical ability before making the program permanent.

独自Q7｜What have organizers confirmed so far?

• A. All participants mastered document management.
• B. The course will certainly become permanent.
• C. More people attended during the first month.
• D. No adults joined the new lessons.

独自Q8｜Why is the program not yet permanent?

• A. Its effect on practical skills still needs evaluation.
• B. The course has been officially banned.
• C. All participants rejected online learning.
• D. The organizers have already measured perfect performance.

パッセージ5｜因果の混同：睡眠習慣の調査と試験結果

英文：A school surveyed volunteers about sleep and study habits. Students who reported longer sleep also tended to report better recent test scores. The researchers cautioned that the association did not prove that extra sleep alone caused higher grades. Differences in study routines or levels of stress might influence both measurements. They recommended a more careful follow-up study.

独自Q9｜What can reasonably be concluded?

• A. The survey found a relationship between reported sleep and scores.
• B. Extra sleep was proved to cause higher grades.
• C. Study routines cannot affect examination results.
• D. Every student with high scores slept longer.

独自Q10｜Why is a follow-up study suggested?

• A. The researchers have already eliminated every alternative.
• B. The survey contained no information about sleep.
• C. Other factors might help explain the observed pattern.
• D. The school decided that test scores should no longer be recorded.

パッセージ6｜因果の混同：新アプリと予約待ち時間

英文：After a public clinic launched an appointment application, average waiting time decreased. Managers welcomed the change but noted that the clinic had also increased the number of staff during the same month. It was therefore difficult to determine how much of the improvement came from the application alone. The managers will compare several periods and ask patients about their experience.

独自Q11｜What limits conclusions about the application?

• A. Waiting time did not change.
• B. The application was never launched.
• C. Staff numbers fell sharply at the same time.
• D. Another operational change occurred during the same period.

独自Q12｜What will managers do next?

• A. Announce that the app alone caused the improvement.
• B. Study results across more periods and collect patient feedback.
• C. Remove all additional staff immediately.
• D. Stop asking patients about their experience.

パッセージ7｜変更前後の逆転：博物館の展示スケジュール

英文：A museum originally planned to open a temporary exhibition in early May. Additional work was needed to confirm the origins of several borrowed objects, so the opening was moved to late May. Staff expect the exhibition to remain open through June, but final closing arrangements have not been announced. The delay allows curators to check important background information.

独自Q13｜What happened to the opening date?

• A. It was brought forward to April.
• B. It was postponed to later in May.
• C. It remained in early May.
• D. The exhibition was canceled permanently.

独自Q14｜What is not yet definite?

• A. The final closing arrangements.
• B. The reason for postponing the opening.
• C. The new opening month.
• D. The type of institution hosting the event.

パッセージ8｜変更前後の逆転：学校の講習と会場変更

英文：A training workshop was advertised for Wednesday at 5 p.m. Several teachers could not attend, and the organizers moved the session to Thursday at 6:30 p.m. They also changed the location from the main hall to a smaller classroom with better computer access. The registration deadline, however, remains Tuesday at noon.

独自Q15｜When and where will the session take place?

• A. Wednesday at 5 p.m. in the main hall.
• B. Thursday at 5 p.m. in the main hall.
• C. Thursday at 6:30 p.m. in a smaller classroom.
• D. Tuesday at noon in the smaller classroom.

独自Q16｜What has not changed?

• A. The date of the workshop.
• B. The venue for the workshop.
• C. The time when the workshop begins.
• D. The Tuesday-noon registration deadline.

パッセージ9｜条件の見落とし：助成金を申請できる事業者

英文：A local program offers small grants to businesses that provide staff with safety training. Applicants must employ fewer than fifty people and submit evidence that an approved training course has been completed. Businesses that meet only one condition are not eligible. The government has not promised funding to every eligible applicant because the total budget is limited.

独自Q17｜Which business meets the stated eligibility requirements?

• A. A firm with 70 employees that completed training.
• B. A firm with 20 employees that has not completed training.
• C. A firm with 55 employees that has not provided proof.
• D. A firm with 30 employees that submits proof of approved training.

独自Q18｜Does eligibility guarantee payment?

• A. Yes, every eligible company is guaranteed a grant.
• B. No, the program has a limited budget.
• C. Yes, grants are available without applications.
• D. No business can receive any funding.

パッセージ10｜条件の見落とし：学校体育館の週末予約

英文：A school permits local groups to book its gym on weekends. Groups must register at least three days in advance and have an adult supervisor present. Students can use the space free of charge, whereas commercial clubs pay a fee. A group that books early but has no adult supervisor will not receive permission to use the gym.

独自Q19｜Which group could use the gym under the rules?

• A. A student group registered four days early with an adult supervisor.
• B. A student group that registers one day early.
• C. A student group without an adult supervisor.
• D. A club that arrives without registering.

独自Q20｜What distinguishes student groups from commercial clubs?

• A. Students are exempt from supervision.
• B. Commercial clubs cannot book the gym at all.
• C. Students can use the facility without paying the commercial fee.
• D. Students may register after the event starts.

パッセージ11｜主体・役割のすり替え：研究者と自治体の環境計画

英文：Researchers studied how different streetlight designs affect nighttime insects. They suggested several options, but they did not choose a policy. The city council will review the findings and decide which changes, if any, should be made. Local residents have been invited to comment before the council votes on a trial.

独自Q21｜Who will decide whether to introduce a trial?

• A. The researchers alone.
• B. Every resident individually.
• C. The city council.
• D. The manufacturer of the streetlights.

独自Q22｜What is the researchers’ role?

• A. To enforce a new law immediately.
• B. To collect taxes for streetlights.
• C. To approve every resident’s comment.
• D. To provide evidence and possible approaches.

パッセージ12｜主体・役割のすり替え：図書館のボランティアと専門相談

英文：At a community library, volunteers help visitors understand basic application forms. Staff members explain that volunteers must not give specialist legal or medical advice. When a question requires professional judgment, visitors are directed to an appropriate public office or qualified specialist. The library reviews its guides and booking procedures, but it does not decide individual legal cases.

独自Q23｜Who should handle specialized legal questions?

• A. Any volunteer who is willing to help.
• B. Qualified professionals or an appropriate public office.
• C. The library without outside assistance.
• D. Visitors without any information.

独自Q24｜What is the library’s main function in this arrangement?

• A. Provide basic guidance and direct difficult cases appropriately.
• B. Issue legal decisions for all visitors.
• C. Replace every medical professional.
• D. Stop residents from using public services.

24問の全解答｜各設問の3つの誤答も検証

問1｜正答 A

正答：Some respondents might cycle more with secure parking.。本文の根拠：some respondents / would consider が直接根拠。

• 誤答1：All residents will stop driving. ― The survey measured volunteers, not all residents.
• 誤答2：Most of the entire town already cycles. ― Only a third of a small sample expressed possible interest.
• 誤答3：Parking facilities are guaranteed to reduce traffic. ― No causal effect or guaranteed result was established.

問2｜正答 C

正答：Participants were self-selected and may not represent all residents.。本文の根拠：online volunteers / might not represent every resident。

• 誤答1：The survey included every person living in the town. ― It included only 120 volunteer participants.
• 誤答2：No commuters responded to the survey. ― There were responses from station commuters.
• 誤答3：Secure parking is illegal in the town. ― No prohibition is mentioned.

問3｜正答 D

正答：Some students found the room helpful for assignments.。本文の根拠：several reported / others rarely used。

• 誤答1：Every student improved examination scores. ― The teachers did not claim schoolwide grade improvements.
• 誤答2：No students used the room because of sports. ― Several students reported benefits.
• 誤答3：The room is open every afternoon. ― It opens only two afternoons each week.

問4｜正答 B

正答：Collect additional feedback and review the schedule.。本文の根拠：gather feedback and adjust hours before expanding。

• 誤答1：Make the room compulsory for everyone. ― No compulsory use is proposed.
• 誤答2：Permanently close the room immediately. ― They are considering adjustments before expansion.
• 誤答3：Assume that all students prefer the current hours. ― Some students cannot use it under current hours.

問5｜正答 B

正答：Pedestrians may receive more shade as the trees mature.。本文の根拠：may reduce direct sunlight / as trees grow。

• 誤答1：Temperatures have already fallen in every district. ― The actual temperature change is not yet known.
• 誤答2：New planting will eliminate summer heat. ― Only a possible reduction in sunlight is suggested.
• 誤答3：The city has committed to planting every road. ― An expansion decision has not been made.

問6｜正答 D

正答：How much the trees will affect temperature under local conditions.。本文の根拠：size of any temperature change is not yet known。

• 誤答1：Whether the project is already operating on two streets. ― The trial on two streets is stated.
• 誤答2：Whether pedestrians exist in the area. ― The project is intended for pedestrians.
• 誤答3：Whether all trees must be removed next year. ― No removal requirement is mentioned.

問7｜正答 C

正答：More people attended during the first month.。本文の根拠：attendance increased / practical ability not yet measured。

• 誤答1：All participants mastered document management. ― Practical performance has not yet been measured.
• 誤答2：The course will certainly become permanent. ― A later evaluation is required first.
• 誤答3：No adults joined the new lessons. ― Attendance increased.

問8｜正答 A

正答：Its effect on practical skills still needs evaluation.。本文の根拠：assess practical ability before making permanent。

• 誤答1：The course has been officially banned. ― No prohibition is described.
• 誤答2：All participants rejected online learning. ― Attendance actually increased.
• 誤答3：The organizers have already measured perfect performance. ― They have not yet measured unfamiliar tasks.

問9｜正答 A

正答：The survey found a relationship between reported sleep and scores.。本文の根拠：associated variables and explicit causality caveat。

• 誤答1：Extra sleep was proved to cause higher grades. ― The researchers explicitly reject a causal conclusion.
• 誤答2：Study routines cannot affect examination results. ― Study routines were identified as possible influences.
• 誤答3：Every student with high scores slept longer. ― The finding was a general tendency, not a universal rule.

問10｜正答 C

正答：Other factors might help explain the observed pattern.。本文の根拠：study routines or stress might influence both。

• 誤答1：The researchers have already eliminated every alternative. ― They mention study routines and stress.
• 誤答2：The survey contained no information about sleep. ― Sleep reports were central to the survey.
• 誤答3：The school decided that test scores should no longer be recorded. ― No such decision exists.

問11｜正答 D

正答：Another operational change occurred during the same period.。本文の根拠：staff increases make attribution uncertain。

• 誤答1：Waiting time did not change. ― The passage says waiting time decreased.
• 誤答2：The application was never launched. ― It was launched before the reduction.
• 誤答3：Staff numbers fell sharply at the same time. ― Staff numbers actually increased.

問12｜正答 B

正答：Study results across more periods and collect patient feedback.。本文の根拠：compare periods and ask patients。

• 誤答1：Announce that the app alone caused the improvement. ― They cannot determine the app’s independent contribution.
• 誤答2：Remove all additional staff immediately. ― No staffing reduction is planned.
• 誤答3：Stop asking patients about their experience. ― They intend to ask for feedback.

問13｜正答 B

正答：It was postponed to later in May.。本文の根拠：originally early May / moved to late May。

• 誤答1：It was brought forward to April. ― The opening moved later, not earlier.
• 誤答2：It remained in early May. ― Late May replaced the original date.
• 誤答3：The exhibition was canceled permanently. ― Only a postponement is described.

問14｜正答 A

正答：The final closing arrangements.。本文の根拠：final closing arrangements have not been announced。

• 誤答1：The reason for postponing the opening. ― The need to confirm object origins is given.
• 誤答2：The new opening month. ― The new plan says late May.
• 誤答3：The type of institution hosting the event. ― It is a museum.

問15｜正答 C

正答：Thursday at 6:30 p.m. in a smaller classroom.。本文の根拠：moved to Thursday 6:30 / changed location。

• 誤答1：Wednesday at 5 p.m. in the main hall. ― Both the day and room changed.
• 誤答2：Thursday at 5 p.m. in the main hall. ― The time and room are wrong.
• 誤答3：Tuesday at noon in the smaller classroom. ― Tuesday noon is the registration deadline.

問16｜正答 D

正答：The Tuesday-noon registration deadline.。本文の根拠：deadline, however, remains Tuesday at noon。

• 誤答1：The date of the workshop. ― Wednesday became Thursday.
• 誤答2：The venue for the workshop. ― Main hall became a smaller classroom.
• 誤答3：The time when the workshop begins. ― 5 p.m. became 6:30 p.m.

問17｜正答 D

正答：A firm with 30 employees that submits proof of approved training.。本文の根拠：fewer than fifty and approved training evidence。

• 誤答1：A firm with 70 employees that completed training. ― It exceeds the employee limit.
• 誤答2：A firm with 20 employees that has not completed training. ― Training evidence is required.
• 誤答3：A firm with 55 employees that has not provided proof. ― It satisfies neither requirement.

問18｜正答 B

正答：No, the program has a limited budget.。本文の根拠：not promised funding to every eligible applicant。

• 誤答1：Yes, every eligible company is guaranteed a grant. ― The passage explicitly rejects this.
• 誤答2：Yes, grants are available without applications. ― Applicants must submit evidence.
• 誤答3：No business can receive any funding. ― The program does offer grants.

問19｜正答 A

正答：A student group registered four days early with an adult supervisor.。本文の根拠：three days or more and adult supervisor。

• 誤答1：A student group that registers one day early. ― It misses the three-day advance requirement.
• 誤答2：A student group without an adult supervisor. ― Supervision is compulsory.
• 誤答3：A club that arrives without registering. ― Advance registration is required.

問20｜正答 C

正答：Students can use the facility without paying the commercial fee.。本文の根拠：students free / commercial clubs pay。

• 誤答1：Students are exempt from supervision. ― The supervisor rule still applies.
• 誤答2：Commercial clubs cannot book the gym at all. ― They may book but pay a fee.
• 誤答3：Students may register after the event starts. ― All groups need advance registration.

問21｜正答 C

正答：The city council.。本文の根拠：city council will review and decide。

• 誤答1：The researchers alone. ― They suggested options but did not choose policy.
• 誤答2：Every resident individually. ― Residents may comment, but the council votes.
• 誤答3：The manufacturer of the streetlights. ― No manufacturer is given decision authority.

問22｜正答 D

正答：To provide evidence and possible approaches.。本文の根拠：studied effects / suggested several options。

• 誤答1：To enforce a new law immediately. ― Researchers did not make policy.
• 誤答2：To collect taxes for streetlights. ― Tax collection is not mentioned.
• 誤答3：To approve every resident’s comment. ― Residents comment before a council vote.

問23｜正答 B

正答：Qualified professionals or an appropriate public office.。本文の根拠：qualified specialists / public office as referral destination。

• 誤答1：Any volunteer who is willing to help. ― Volunteers are explicitly not responsible for specialist advice.
• 誤答2：The library without outside assistance. ― The library does not decide individual legal cases.
• 誤答3：Visitors without any information. ― They are directed to suitable support.

問24｜正答 A

正答：Provide basic guidance and direct difficult cases appropriately.。本文の根拠：basic forms / refer complex questions。

• 誤答1：Issue legal decisions for all visitors. ― The library has no role deciding legal cases.
• 誤答2：Replace every medical professional. ― Volunteers cannot provide specialist advice.
• 誤答3：Stop residents from using public services. ― Its goal is to help people use them.

正解しても実力が定着しない3つの場合

• 同じ選択肢を暗記：本文の根拠が説明できなければ、別の語彙や順番の初見問題で失点する可能性があります。
• 日本語訳だけで満足：may・not necessarily・only・unlessなどの限定が実際に保存されているか確かめます。
• 正答だけ見る：他の3択がなぜ不正解かも説明し、逆方向・過剰一般化・内容追加のいずれかに分類します。

14日間で誤答理由を説明できるようにする

• 1〜2日目：パッセージ1・2。some / allと標本の範囲を確認。
• 3〜4日目：パッセージ3・4。may / willと未確認の実績を区別。
• 5〜6日目：パッセージ5・6。相関と因果、同時期の改善と原因を区別。
• 7〜8日目：パッセージ7・8。変更前と後の日時、変更されていない条件を整理。
• 9〜10日目：パッセージ9・10。資格条件と予算・監督者の必要性を理解。
• 11〜12日目：パッセージ11・12。研究者・議会・図書館・専門家の役割を区別。
• 13日目：24問の各誤答の理由を答えを見ずに説明。
• 14日目：英検協会の公式過去問で新しい長文を解き、同じ誤読をしないか確認。

関連する慶英会の無料教材

段落要旨を読む独自6長文18問／this・these等の指示語16問／長文空所6問・内容一致7問で、本文の構造→要旨→選択肢の根拠の順に進めます。

よくある質問

本文と同じ単語が選択肢にあれば正解ですか？

必ずしもそうではありません。限定・因果・時制・主体を変えた誤答の可能性があるため、本文へ戻して照合します。

mayをwillへ言い換えてもよいですか？

可能性を確定に変えるため、一般に意味は強くなります。原文で確実な結果が示されているかを確認してください。

相関があれば因果関係も証明できますか？

相関だけで因果を確定できません。他の要因や調査設計の検討が必要です。

この24問は英検協会の公式の形式ですか？

いいえ。慶英会が作成した誤選択肢分析用の独自24問です。公式の長文内容一致は7問です。

長文が読めないのは語彙不足だけですか？

語彙・構文・段落要旨・選択肢のすり替えなどに原因が分かれるため、誤答した箇所を確認してください。

毎回すべての選択肢を訳すべきですか？

演習段階では根拠の検証に有効ですが、本番の90分の時間内に処理できる読み方も練習してください。

慶英会の英検準1級・個別学習相談

慶英会では、長文読解の失点を語彙・構文・本文の論理・選択肢の解釈に分類し、初見の文章で正答根拠を説明できるように練習します。最大1か月完全無料体験・学習相談はこちら。

参考にした主な公式情報

• 日本英語検定協会「準1級の試験内容」：長文内容一致7問、長文空所補充6問
• 日本英語検定協会「準1級の公式過去問」：実際の文章・4択の形式

公式情報の確認日：2026年10月26日。本文の英文12本・4択24問・誤答分析72件は慶英会が作成した独自教材です。英検協会の公式問題・解答を転載したものではありません。

最大1ヶ月無料体験授業受付中！（残り枠わずかです！）

最大1ヶ月の「完全無料」指導体験
平均2~3時間のレッスン ＋ 毎日LINEサポート付き

ご入塾前に、慶英会の圧倒的な指導品質をじっくりご体感ください。

無料体験だけで成績が上がる方も続出!!
保護者様の教育相談も無料で承ります。

1.学年 2. 学習目標　3.体験ご希望をお送りください。

⚠️【塾長直接指導の残り枠わずか】
枠が埋まり次第終了となります。お早めにお申し込みください。

最大1ヶ月無料体験（残り枠わずか）Eメールでのお申し込み