英検長文の不正解選択肢を正しい英文に直すには？｜NEW TREASUREの独自4長文40問【全修正文】

英検の長文やNEW TREASURE（ニュートレジャー）のReadで、正解を選べても「不正解の選択肢はどこが間違い？」と聞かれると説明できないことがあります。慶英会では、誤った英文をただ×にするのではなく、①本文と違う部分を見つける→②日付・人数・主語・否定・許可・因果・確実性のどれかを分類する→③本文に合う自然な英文に直す→④根拠の英文を示す方法を勧めています。このページでは独自4長文と40の不正確な英文を用い、40問すべての修正文・根拠と7日間の復習法を無料公開します。

4ステップ → 独自4長文40問 → 全修正文・理由 → 7日復習から利用してください。これは英検公式問題やＺ会教科書の転載ではなく、慶英会が制作した誤答分析教材です。

監修：慶英会 塾長（慶應義塾大学卒・英検1級）。記載される学校・人数・行事は教育用の架空事例です。受験級・学校Lessonの正式な指示を優先してください。

誤った英文を直す4ステップ

順序	すること	例
1	本文と違う語句を見つける	Friday / Thursday
2	失点種類を分類	変更前後・人数・対象・否定・確実性
3	本文に合う正しい英文へ修正	Twenty-four videos were submitted.
4	正しい根拠を説明	Some videos were made by groups.

典型的な誤答5種類

• **日時の入れ替え**：開催日と申込期限、集合と開始を混同しない。
• **対象の入れ替え**：登録者・出席者・回答者・提出本数は別。
• **限定の消失**：only / some / not all / without permissionを確認。
• **期待の事実化**：hope / may / mightを証明済みの結果としない。
• **因果の創作**：人気が高まったことから成績向上を推定しすぎない。

慶英会オリジナル4長文40問｜誤文を修正

学校祭の案内｜変更された日付・場所・参加条件（問1〜問10）

慶英会独自の英文：The student council at East Valley School planned an art fair for Thursday, November 12. When the main hall needed repairs, the fair was moved to Friday, November 13, at 3:30 p.m. The location changed to the music room. A short music performance would begin at 4:20 p.m. Students attending the fair should bring their school ID cards, while the art club would provide pencils and paper. Students who wanted to display their own artwork had to register by Wednesday at noon. Families could attend, but visitors from outside the school needed permission in advance. The organizers hoped for at least eighty visitors, although they had not counted registrations. Questions about accessibility had to be sent to Ms. Green by Tuesday evening.

次の各英文には本文との食い違いがあります。自分で英文を書き直し、どの表現が根拠か考えてください。

• 問1：The fair was moved to Thursday, November 12.
• 問2：The fair begins at 4:20 p.m.
• 問3：The art fair will be held in the main hall.
• 問4：Visitors must bring pencils and paper.
• 問5：Students may display artwork without registering.
• 問6：The artwork registration deadline is Friday.
• 問7：All outside visitors may enter without permission.
• 問8：The music performance starts at 3:30 p.m.
• 問9：Exactly eighty visitors have registered.
• 問10：Accessibility questions should be sent on Friday evening.

自然観察の調査｜参加人数と観察回数（問11〜問20）

慶英会独自の英文：The nature club observed birds on four Saturday mornings. In the first session, twelve students participated and recorded eighteen bird sightings. In the fourth session, fifteen students participated and recorded twenty-two sightings. One bird might have been counted more than once, and not every bird was identified. Several students said they enjoyed using binoculars, but the club had not tested wildlife knowledge. One volunteer suggested moving future sessions to Sundays, while another preferred Saturdays. The club decided to ask families about their schedules before making any change. A report will be published next month, after the records are checked and students have given permission for their photographs to be used.

次の各英文には本文との食い違いがあります。自分で英文を書き直し、どの表現が根拠か考えてください。

• 問11：The club observed birds on four Sunday afternoons.
• 問12：Eighteen students attended the first session.
• 問13：Exactly eighteen different birds were seen in the first session.
• 問14：Twenty-two students attended the fourth session.
• 問15：Every bird observed was identified.
• 問16：The club proved that students learned more about birds.
• 問17：Every volunteer supported Sunday sessions.
• 問18：The club immediately moved its meetings to Sunday.
• 問19：The report was published the next day.
• 問20：The club can publish students’ photographs without permission.

地域の読書教室｜登録・出席・アンケート（問21〜問30）

慶英会独自の英文：A community center held an English reading workshop for six weeks. Fifty-eight teenagers registered, and thirty-six attended at least one session. Twenty-eight attendees completed the final feedback form, and twenty-three of those respondents said the activities were useful. Some students prepared summaries in pairs, while others worked alone. Attendance seemed lower on evenings when the bus service ended early, but the organizers had not recorded all travel times or tested reading comprehension. They could not conclude that transportation alone caused lower attendance or that reading ability improved. The manager planned to interview non-attendees and test a Saturday morning session. The trial date had not yet been announced. Printed materials would remain available.

次の各英文には本文との食い違いがあります。自分で英文を書き直し、どの表現が根拠か考えてください。

• 問21：All fifty-eight registrants attended.
• 問22：Thirty-six people returned feedback forms.
• 問23：Twenty-three of all registrants approved.
• 問24：All participants worked alone.
• 問25：Buses were proven to be the only cause of low attendance.
• 問26：Every participant’s reading improvement was measured.
• 問27：The Saturday trial has already finished.
• 問28：The trial date has been announced.
• 問29：Printed materials will be removed from the next workshop.
• 問30：Only regular attendees will be interviewed.

学校間の動画交流｜提出・同意・未検証の効果（問31〜問40）

慶英会独自の英文：Four partner schools planned an online cultural video exchange. Each team would make a video of about ninety seconds with English captions. The deadline was extended from Tuesday at 5:00 p.m. to Wednesday at noon so that captions could be checked carefully. The live exchange remained on Friday at 4:00 p.m. Two classmates needed to check each video’s final captions before submission. Students could use dictionaries and translation tools during preparation, but they were responsible for the final English. No classmate could appear in a video without that person’s agreement. Forty-one students expressed interest, and twenty-four videos were submitted; some videos were made by groups. The organizers hoped the exchange would improve speaking, but no speaking tests were conducted.

次の各英文には本文との食い違いがあります。自分で英文を書き直し、どの表現が根拠か考えてください。

• 問31：Three schools organized the exchange.
• 問32：Videos had to last exactly three minutes.
• 問33：The final deadline was Tuesday at five.
• 問34：The live exchange was moved to Thursday.
• 問35：A single teacher checked the final captions.
• 問36：Dictionaries were prohibited during preparation.
• 問37：Classmates’ faces could be shown without permission.
• 問38：Forty-one videos were submitted.
• 問39：Exactly twenty-four students participated.
• 問40：The exchange proved better speaking ability.

40問すべての修正文・誤りの種類と根拠

学校祭の案内｜変更された日付・場所・参加条件｜全解答

• 問1・日時：The fair was moved to Friday, November 13.　根拠：moved to Friday。
• 問2・開始時刻：The fair begins at 3:30 p.m.　根拠：4:20は演奏開始。
• 問3・場所：The art fair will be held in the music room.　根拠：main hallは修理対象。
• 問4・持参物：The art club will provide pencils and paper.　根拠：provideの主語を区別。
• 問5・登録条件：Students who wish to display artwork must register.　根拠：had to register。
• 問6・締切：The artwork registration deadline is Wednesday at noon.　根拠：by Wednesday at noon。
• 問7・許可：Outside visitors need permission in advance.　根拠：外部訪問者への条件。
• 問8・行事区別：The music performance starts at 4:20 p.m.　根拠：フェアと演奏の開始時刻が異なる。
• 問9・目標・実績：The organizers hope for at least eighty visitors; registrations have not been counted.　根拠：hope / had not counted。
• 問10・相談期限：Accessibility questions must be sent by Tuesday evening.　根拠：by Tuesday evening。

自然観察の調査｜参加人数と観察回数｜全解答

• 問11・曜日・時間：The club observed birds on four Saturday mornings.　根拠：four Saturday mornings。
• 問12・指標：Twelve students attended, and eighteen bird sightings were recorded.　根拠：studentsとsightingsを区別。
• 問13・重複：Eighteen sightings were recorded, but a bird may have been counted more than once.　根拠：sightingsは個体数とは限らない。
• 問14・指標：Fifteen students attended, and twenty-two sightings were recorded.　根拠：15 participants、22 sightings。
• 問15・否定：Not every bird observed was identified.　根拠：not every。
• 問16・未測定：The club did not test students’ wildlife knowledge.　根拠：知識テストなし。
• 問17・意見の差：One volunteer suggested Sundays, while another preferred Saturdays.　根拠：whileで対比。
• 問18・未決定：The club decided to ask families before changing the schedule.　根拠：先に家庭の予定を確認。
• 問19・時系列：The report will be published next month.　根拠：next monthが予定。
• 問20・同意：The club will obtain permission before using students’ photographs.　根拠：permissionが必要。

地域の読書教室｜登録・出席・アンケート｜全解答

• 問21・登録・出席：Thirty-six of the fifty-eight registrants attended at least once.　根拠：registered≠attended。
• 問22・回答者数：Twenty-eight attendees returned feedback forms.　根拠：feedback 28。
• 問23・分母：Twenty-three of the twenty-eight respondents said the activities were useful.　根拠：回答者のうち23。
• 問24・対象：Some worked in pairs, while others worked alone.　根拠：some / others。
• 問25・因果：The organizers could not prove that transportation alone caused the attendance pattern.　根拠：travel timesは未収集。
• 問26・未測定：Reading comprehension was not tested.　根拠：学力検査なし。
• 問27・予定・実績：The manager plans a Saturday morning trial.　根拠：plans to test。
• 問28・発表状況：No date for the Saturday trial has been announced.　根拠：not yet announced。
• 問29・継続：Printed materials will remain available.　根拠：remain available。
• 問30・対象範囲：The manager plans to interview non-attendees.　根拠：non-attendees。

学校間の動画交流｜提出・同意・未検証の効果｜全解答

• 問31・学校数：Four partner schools organized the exchange.　根拠：four schools。
• 問32・長さ：Videos were to last about ninety seconds.　根拠：about 90 seconds。
• 問33・締切変更：The deadline was extended to Wednesday at noon.　根拠：extended to。
• 問34・開催日時：The live exchange remained on Friday at 4:00 p.m.　根拠：remainedで変更なし。
• 問35・確認主体：Two classmates checked each video’s final captions.　根拠：two classmates。
• 問36・利用条件：Dictionaries and translation tools could be used during preparation.　根拠：could use。
• 問37・同意条件：Anyone appearing needed to agree in advance.　根拠：without agreementは不可。
• 問38・指標：Twenty-four videos were submitted; forty-one students expressed interest.　根拠：videosとinterest。
• 問39・推論の限界：The number of participants cannot be inferred from the twenty-four videos, some of which were made by groups.　根拠：videos≠individuals。
• 問40・未検証：Speaking improvement was not established because no tests were conducted.　根拠：hopeと実証は別。

答え合わせ後の確認

点検	必要なこと	誤解しやすい例
数・時刻・単位	何人・何冊・何時かを維持	registrationsをattendeesに変えない
文法と意味	主語と時制が自然	didの後に過去形を付けない
確実性	未測定なら未測定と答える	increased visits≠improved scores

模範以外の英文も、本文の意味と条件を保持し文法的に自然なら別解があります。修正された英文の数値や確実性を自分で改変しないことが重要です。

7日間の復習

日	取り組み	確認内容
1日目	学校祭10問：日時・持参物・許可	変更後だけを選べるか
2日目	自然観察10問：観察回数と人数	何を数えたか
3日目	読書教室10問：登録と回答者	母数が適切か
4日目	動画交流10問：本数・同意・未検証	only ifと効果の限界
5日目	×になった問題を別文で再出題	丸暗記にならないか
6日目	学校の既習Lessonと英検公式過去問へ	出題形式を確認
7日目	新しい短文5問を自分で修正	根拠を説明できるか

関連無料教材

• 4択正答の理由が分からない40問
• 一語で意味が変わる40組
• 本文の根拠に線を引く40問
• 本文にない質問の前提を修正する40問
• 英検級別の公式過去問・試験形式

よくある質問

Q．英検本番で不正解選択肢を全部書き直す必要がありますか？

いいえ。本記事は復習の練習方法です。実際の試験では級別の正式な解答方法・時間の指示に従ってください。

Q．一語だけ直せば常に正しい英文になりますか？

必ずしもそうではありません。文によっては数値と主語の両方が違うため、必要な部分を直して全体を確認します。

Q．知らない数字を自分で推測して直してよいですか？

本文にない数字は作れません。本文で分かる範囲だけを答え、根拠がなければ判断できないと区別します。

Q．学校と英検の長文は同じ出題形式ですか？

学校の指定Lessonや英検級別の試験形式により異なります。読解の根拠確認は共通練習として使えますが、独自40問は公式の模試ではありません。

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参考にした主な公式情報

• 日本英語検定協会｜級別の過去問・試験内容
• Ｚ会｜NEW TREASURE公式シリーズ

公式情報の確認日：2026年10月26日。独自4長文・40問・全修正文・復習計画は慶英会制作であり、英検協会やＺ会の公式問題ではありません。

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