慶英会 塾長｜慶應義塾大学卒・英検1級
中高一貫校の学校英語・NEW TREASURE・英検対策を専門とするオンライン個別指導塾です。塾長紹介
結論：英検1級の英文要約では、原文の出来事の順序を逆にしたり、単なる時間の前後関係を原因と結果に書き換えたりすると、原文と違う意味になります。`after` は『〜の後』、`because` は『〜が理由で』であり、同じではありません。慶英会では時系列・原因・対応の誤りを直す独自36問、全文和訳付き長文3題、90〜110語の模範要約3本を無料公開します。
英検協会の現行1級Writingでは英文要約が1題出題されます。公式形式は日本英語検定協会の1級試験内容で確認してください。本教材は慶英会の独自長文・修正問題であり、公式過去問や実際の調査結果ではありません。
時系列を崩さない4つの基本
- before / already / previouslyで、基準時点より先に完了した出来事を特定する。
- after / subsequently / eventuallyで、先に起きた事実とその後の対応を分ける。
- not until / only after / onceなどは時点や条件を表し、実施済みの証明ではない。
- 二つの変化が同時に起きても、特定の施策が原因だったとは自動的に言えない。
独自36問｜誤った時系列・因果の言い換えを修正
1．afterとbecause｜前後関係は原因の証明ではない（6問）
Q1 原文：Attendance increased after the center changed its opening hours.
不適切な要約：The change in opening hours proved that attendance increased because of the new schedule.
Q2 原文：Complaints declined after the website was redesigned.
不適切な要約：The redesign definitely eliminated the reasons for all complaints.
Q3 原文：A new survey was introduced after criticism of the original method.
不適切な要約：The original criticism was caused by the new survey.
Q4 原文：The mayor announced a review after the audit identified errors.
不適切な要約：The audit was commissioned because the review had already begun.
Q5 原文：The organization received more donations after it changed its message.
不適切な要約：The revised message conclusively caused all additional donations.
Q6 原文：The equipment was repaired after repeated service failures.
不適切な要約：The repairs caused the earlier failures.
2．before・already・previously｜基準時点を守る（6問）
Q7 原文：Staff had already completed training before the new system opened.
不適切な要約：Training began after the system opened.
Q8 原文：The council reviewed proposals previously rejected by the advisory panel.
不適切な要約：The advisory panel rejected the proposals after council approval.
Q9 原文：Before approving expansion, the board required an independent review.
不適切な要約：The board approved expansion and only then requested a review.
Q10 原文：The archive had already digitized basic records when the funding ended.
不適切な要約：Digitization began only after the funding ended.
Q11 原文：A temporary service had been operating for months before it was evaluated.
不適切な要約：The evaluation was completed before any service began.
Q12 原文：The new instructions superseded guidelines issued the previous year.
不適切な要約：The old guidelines were published after the new instructions.
3．not until・only after・once｜判断条件を保つ（6問）
Q13 原文：The final report was not released until the privacy review ended.
不適切な要約：The final report was released before privacy review.
Q14 原文：Only after staff verified the equipment did the committee permit its use.
不適切な要約：The committee gave unconditional permission before testing.
Q15 原文：Once approved, the plan would be published for public comment.
不適切な要約：The plan had been approved and permanently implemented.
Q16 原文：The funding would be renewed only if the trial met safety standards.
不適切な要約：The funding was automatically renewed regardless of safety.
Q17 原文：The board did not make a final decision until new data arrived.
不適切な要約：The board had decided before it received the new information.
Q18 原文：The city promised to reconsider expansion once costs were independently assessed.
不適切な要約：Expansion was approved immediately and the cost review was canceled.
4．while・during・meanwhile｜同時でも同じ主体とは限らない（6問）
Q19 原文：While the center ran its pilot, the council evaluated possible alternatives.
不適切な要約：The center’s managers necessarily evaluated every alternative themselves.
Q20 原文：During the consultation, residents raised concerns about noise.
不適切な要約：The concerns were resolved before consultation started.
Q21 原文：The staff repaired the building; meanwhile, researchers surveyed its users.
不適切な要約：The staff and researchers performed identical tasks.
Q22 原文：While costs declined, requests for assistance continued to rise.
不適切な要約：Lower costs caused every request to increase.
Q23 原文：An archive remained open during the review.
不適切な要約：The review had ended before the archive opened.
Q24 原文：The program was expanded while its long-term benefits were still uncertain.
不適切な要約：Expansion occurred only after all long-term benefits had been proved.
5．subsequently・eventually・initially｜段階的な修正（6問）
Q25 原文：Initially the team supported nationwide expansion, but it subsequently favored a limited trial.
不適切な要約：The team’s final recommendation was immediate nationwide expansion.
Q26 原文：The council first considered three proposals and eventually selected one for testing.
不適切な要約：The council implemented all three proposals permanently.
Q27 原文：The original report emphasized attendance; later reviews examined learning.
不適切な要約：The first report established learning gains and later reports measured attendance.
Q28 原文：The museum initially planned unrestricted access but ultimately retained privacy controls.
不適切な要約：The museum finally approved unrestricted access.
Q29 原文：Researchers proposed a model and subsequently tested it under new conditions.
不適切な要約：The tests were completed before the model was proposed.
Q30 原文：The pilot ended; the board later decided whether to expand it.
不適切な要約：The permanent expansion was approved before the trial finished.
6．原因・対応・成果の三段階を混同しない（6問）
Q31 原文：A data error was discovered, prompting a revision of the published figures.
不適切な要約：The revision of the figures created the original data error.
Q32 原文：Transport barriers motivated the trial, but actual improvements remained unverified.
不適切な要約：The trial was launched because the barriers had already disappeared.
Q33 原文：Complaints led to an investigation, which identified inconsistent records.
不適切な要約：The inconsistent records caused complaints only after the investigation finished.
Q34 原文：The agency announced a reform, but implementation was delayed by staffing shortages.
不適切な要約：The reform had been completed when staffing shortages were discovered.
Q35 原文：A pilot indicated possible benefits; the council requested further evidence before expansion.
不適切な要約：The council approved expansion because the pilot had proved every benefit.
Q36 原文：The committee extended the trial after reviewing costs, but its permanent funding remained undecided.
不適切な要約：Cost review was canceled and permanent funding was secured.
全36問の模範修正と詳しい理由
1．afterとbecause｜前後関係は原因の証明ではない（6問）｜解答
A1 修正：Attendance increased following the schedule change, but the cause was not established.
理由：afterが示すのは前後関係。ほかの要因の可能性を排除できない。
A2 修正：Complaints fell after the redesign; it was not clear how much of the change the redesign caused.
理由：苦情の減少と原因が全て解決したことは違う。
A3 修正：The criticism came first, followed by the introduction of a new survey.
理由：出来事の順序を逆転させない。
A4 修正：The audit identified errors before the mayor announced a review.
理由：監査結果が先、見直し発表が後。監査の依頼時点は不明。
A5 修正：Donation totals rose after the messaging change, although other influences were possible.
理由：前後の一致だけで唯一原因としない。
A6 修正：Repeated failures preceded the repairs.
理由：原因と対応の時点を反対にしない。
2．before・already・previously｜基準時点を守る（6問）｜解答
A7 修正：Training had been completed before the system became available.
理由：過去完了は開設より先の完了。
A8 修正：The panel’s rejection came before the council reviewed the proposals.
理由：previouslyが示す先行する判断を残す。
A9 修正：The board made independent review a prerequisite for approving expansion.
理由：審査が条件。拡大は承認済みとは限らない。
A10 修正：Basic records had been digitized by the time funding ended.
理由：when以前の完了と資金の終了を区別。
A11 修正：The service operated for months before its evaluation.
理由：試行が先で評価が後。
A12 修正：Earlier guidelines were replaced by newer instructions.
理由：前年度の指針と新しい指示の順序を保持。
3．not until・only after・once｜判断条件を保つ（6問）｜解答
A13 修正：The report was released only after the privacy review had finished.
理由：not untilが公開の下限時点を示す。
A14 修正：Permission followed verification of the equipment.
理由：only afterの強調を読み落とさない。
A15 修正：Publication for comment would follow approval, which was not yet established.
理由：once approvedは今後の承認条件を示す。
A16 修正：Meeting safety standards was necessary for renewal; renewal was not guaranteed.
理由：only ifは必要条件。十分条件ではない。
A17 修正：New information arrived before the board made its final decision.
理由：否定とuntilにより決定時点が限定される。
A18 修正：The city promised reconsideration after a cost assessment, not immediate expansion.
理由：再検討という段階と拡大承認を区別。
4．while・during・meanwhile｜同時でも同じ主体とは限らない（6問）｜解答
A19 修正：The pilot and council’s evaluation took place during overlapping periods.
理由：whileは同時性。異なる主体を混同しない。
A20 修正：Residents expressed noise concerns in the course of consultation.
理由：duringはその期間の発言を示す。
A21 修正：Repairs and user surveys proceeded in parallel, with different teams responsible.
理由：meanwhileは同時進行で主体を分ける。
A22 修正：Costs declined as requests rose; causation between the trends was not established.
理由：whileが対比と時間の重なりを示し得るが因果を保証しない。
A23 修正：The archive stayed open while the review was in progress.
理由：審査中も事業が続いたという事実。
A24 修正：The program expanded despite uncertainty about long-term benefits.
理由：whileは未解決の状態と同時の拡大を示す。
5．subsequently・eventually・initially｜段階的な修正（6問）｜解答
A25 修正：The team revised its initial position and later supported a limited trial.
理由：initiallyとsubsequentlyで立場の変化を示す。
A26 修正：The council considered several options before selecting one for a trial.
理由：検討中の案と最終選定の範囲を分ける。
A27 修正：Early evaluation focused on attendance, whereas later work examined learning.
理由：評価項目の変化を逆転しない。
A28 修正：The final policy retained privacy protections despite the original plan.
理由：最終的な判断に重きを置く。
A29 修正：The model came first, followed by tests in new conditions.
理由：仮説・モデルと後の検証を分ける。
A30 修正：The expansion decision followed the completion of the pilot.
理由：決定は試行後であり、結果は未記載。
6．原因・対応・成果の三段階を混同しない（6問）｜解答
A31 修正：The error was found first, and the published figures were then revised.
理由：発見→対応の順序。
A32 修正：Existing barriers prompted the trial, whose outcomes had not been established.
理由：目的となる問題と改善済み成果を区別。
A33 修正：Complaints prompted an investigation that later found record inconsistencies.
理由：苦情→調査→発見という事実に沿う。
A34 修正：The reform was announced but could not yet be implemented as planned.
理由：発表と実施・遅延を区別する。
A35 修正：Promising pilot results led to a request for more evidence, not immediate expansion.
理由：有望→追加検証であり、拡大済みではない。
A36 修正：A cost review preceded a trial extension; long-term funding was not yet settled.
理由：審査→試行延長→恒久支援未決の順序を保持。
独自長文3題｜初見で英語90〜110語にまとめる
原文A｜再使用可能な容器の貸出事業｜原文227語
Task：Summarize the passage in 90–110 English words. Preserve the sequence of events and do not invent causal links.
Paragraph 1：A fictional town launched a program that allowed residents to borrow reusable containers for takeaway food. Organizers hoped that fewer single-use packages would eventually need disposal. Before the program began, several restaurants had already agreed to provide collection points. In the first month, the number of loans grew, and town officials welcomed the response as a sign of interest. However, they had not established how many disposable packages were actually avoided.
Paragraph 2：During the trial, the organizers encountered unexpected problems. Some containers were returned late, others required additional cleaning, and a few collection points lacked storage space. Restaurant owners requested simpler procedures, while environmental groups argued that the additional costs should be considered alongside potential waste reduction. The two sides did not agree on every detail, but both supported further evaluation rather than immediate abandonment.
Paragraph 3：After reviewing these concerns, the town introduced clearer return instructions and a limited number of collection locations. The revised process was tested for a further period. Only after costs, actual returns, and disposal outcomes could be compared would the council consider permanent expansion. Officials also noted that a rise in container loans did not necessarily mean a proportional reduction in waste.
Paragraph 4：The council therefore decided to continue the trial without committing to long-term subsidies. Its next report would distinguish participation, the practical performance of the system, and any measurable change in discarded packaging.
原文B｜地方の無料学習センターと開館時間｜原文236語
Task：Summarize the passage in 90–110 English words. Preserve the sequence of events and do not invent causal links.
Paragraph 1：A fictional regional learning center offered free evening classes for residents studying English and mathematics. Before the first evaluation, the center had already extended opening hours on two days of the week. Staff reported that attendance rose after the extension, and several participants said the new schedule was convenient. An administrator suggested that the longer hours were responsible for the rise, but the evaluation team pointed out that a new advertising campaign had begun at about the same time.
Paragraph 2：While the center continued its classes, reviewers interviewed residents who did not attend. Some could not reach the building easily, whereas others preferred online materials or worked during the revised hours. The reviewers did not assume that everyone who was absent lacked interest in learning. They also examined whether regular attendees improved on unfamiliar tasks rather than simply returning more frequently.
Paragraph 3：Following the interviews, the center tested a small number of online support sessions and adjusted the timetable for one additional class. These changes were not implemented throughout the entire region. Once the next round of results became available, the governing board planned to compare participation, learning outcomes, staff workload, and travel barriers before deciding on expansion.
Paragraph 4：The board ultimately retained the limited trial. It welcomed the earlier rise in attendance but acknowledged that the effect of longer opening hours had not been isolated from the advertising campaign. Permanent funding for the new arrangements therefore remained undecided.
原文C｜データを共有する図書館網と改定手続き｜原文235語
Task：Summarize the passage in 90–110 English words. Preserve the sequence of events and do not invent causal links.
Paragraph 1：A fictional network of public libraries developed a shared catalog to help readers search for resources held in different districts. The participating libraries had agreed on basic data formats before the catalog became available. After its release, online searches increased rapidly, and several branches reported fewer requests for assistance with routine searches. Supporters argued that the system could make access to resources more convenient, but the initial report did not establish whether people who had previously struggled to find materials were now better served.
Paragraph 2：During the following months, staff discovered that some records described outdated editions and that duplicate entries occasionally confused users. Library specialists proposed a review procedure, while software contractors warned that extensive manual checks could delay updates. Both groups accepted that inaccurate records needed attention, but they differed over how much time to devote to verification.
Paragraph 3：The network subsequently tested automatic duplicate alerts combined with human checks of disputed entries. The board planned to evaluate the revised process once enough examples had been reviewed. It had not yet authorized the same procedures in every branch. Reviewers requested information about actual successful searches, staff time, accessibility, and how frequently errors were corrected.
Paragraph 4：The network continued operating while the new verification method was assessed. The board welcomed growing searches as evidence of interest, not as proof that every user had obtained reliable information. Permanent adoption of the revised procedure would depend on further findings.
長文3篇・全12段落の日本語訳
原文A｜再使用可能な容器の貸出事業｜全文和訳
第1段落：架空の町は持ち帰り食品用の再利用可能な容器を貸し出す事業を始めた。使い捨て包装の廃棄が減ることを期待していた。事業開始前には、いくつかの飲食店が回収拠点の設置に同意していた。初月の貸出数は増えたが、実際に回避された使い捨て容器の数はまだ分からなかった。
第2段落：試行中、返却の遅れ、追加洗浄、回収拠点の保管場所不足などが発生した。飲食店は手順の簡素化を求め、環境団体は追加費用も将来の廃棄削減と合わせて評価すべきだと主張した。細部では意見が異なったが、双方とも即時中止でなく追加評価を支持した。
第3段落：問題を検討した後、町は返却の指示を明確化し、回収拠点数を限定した。改定した方法をさらに試すことになった。費用、実返却、廃棄の成果を比較した後にのみ恒久拡大が検討される。貸出増が廃棄削減と比例するとは限らないとの注意もあった。
第4段落：そのため議会は長期補助金を約束せず試行継続を決めた。次の報告では参加量、運用面の成果、廃棄容器の実際の変化を分けて示す方針だった。
原文B｜地方の無料学習センターと開館時間｜全文和訳
第1段落：架空の地域学習センターは英語・数学の無料夜間講座を提供した。最初の評価より前に週2日の開館時間をすでに延長していた。その後出席者が増え、一部の受講者は便利になったと答えた。管理者は時間延長が増加の原因だと考えたが、評価者は同時期に広告活動も始まったことを指摘した。
第2段落：講座を続けながら、評価者は非参加者に聞き取りを行った。施設へ行きにくい人、オンライン教材を好む人、改定時間帯にも働いている人がいた。欠席者全員が学習に無関心とは決め付けず、常連が繰り返し参加しただけでなく初見課題での学習成果があるかも調べた。
第3段落：聞き取り後、センターは少数のオンライン支援を試し、別の一講座の時間も調整した。地域全体へ導入したわけではない。次の結果が得られた時点で、参加数、学習成果、職員の負担、移動上の障壁を比較して拡大を判断する方針とした。
第4段落：理事会は最終的に限定試行を維持した。出席増は歓迎したものの、開館延長の効果を広告活動から切り離して特定できてはいなかった。新方式への恒久資金支援も未決定だった。
原文C｜データを共有する図書館網と改定手続き｜全文和訳
第1段落：架空の公共図書館ネットワークは異なる地区の蔵書を探せる共通目録を開発した。利用開始前に基本データ形式の合意は済んでいた。公開後ネット検索が急増し、一部の分館では定型的な検索支援の依頼が減った。支持者は資料を探しやすくなる可能性を挙げたが、元々利用に困っていた人が十分支援されたかは初期報告で明らかになっていなかった。
第2段落：その後数か月で旧版を示す記録や重複項目による混乱が見つかった。図書館職員は審査手続きを提案し、ソフト業者は手作業が多いと更新が遅れると警告した。記録の不正確さへの対処は双方が認めたが、検証にかける時間で意見が分かれた。
第3段落：続いてネットワークは重複の自動警告と人手による確認を組み合わせて試した。十分な件数を審査した後に評価する方針で、全分館に統一実施することはまだ認めていなかった。実際に成功した検索、職員の時間、アクセス、誤りの訂正頻度を測定するよう求めた。
第4段落：新しい検証方法を評価する間もネットワークは稼働した。理事会は検索数増加を関心の兆候として歓迎したが、全利用者の信頼できる情報取得が証明されたわけではない。改定方式の恒久導入は今後の結果次第だった。
90〜110語の模範要約3篇と原文の時系列
原文A｜再使用可能な容器の貸出事業｜模範99語
A town introduced reusable takeaway containers, hoping to reduce disposable packaging. Restaurants had agreed to collection points before the program began, and initial loans increased, but avoided waste remained unmeasured. During the trial, late returns, cleaning needs, and storage limits created difficulties. Restaurant owners requested simpler procedures, while environmental groups wanted costs assessed alongside possible benefits. The town subsequently revised return instructions and tested a smaller collection system. Rather than approve permanent expansion, the council continued the trial and planned to compare actual returns, operating expenses, and disposal outcomes. Higher loan totals alone could not demonstrate proportional waste reduction.
残した順序：
- 順序1：容器貸出事業の開始前に飲食店の協力が決まっていた
- 順序2：開始後の貸出増は廃棄削減と未対応
- 順序3：問題発見後に手順改善・追加試行
- 順序4：恒久拡大は未決定
原文B｜地方の無料学習センターと開館時間｜模範95語
A regional learning center extended evening hours before its first evaluation, and attendance subsequently increased. However, reviewers noted that an advertising campaign began around the same time, so the effect of longer hours remained uncertain. While classes continued, interviews with nonparticipants revealed transport, scheduling, and learning-preference barriers. Reviewers also sought evidence of improved understanding rather than repeat attendance alone. The center then tested limited online support and another timetable adjustment. The board retained the trial without approving permanent funding. Further expansion would depend on learning outcomes, access, staffing, and costs once additional evidence became available.
残した順序：
- 順序1：評価前に開館時間が延長され、後に出席が増加
- 順序2：広告活動が同時期で因果は未確定
- 順序3：非参加者調査後にオンライン支援の追加試行
- 順序4：恒久資金は未承認
原文C｜データを共有する図書館網と改定手続き｜模範101語
Public libraries agreed on data formats before introducing a shared catalog, after which online searches increased. Some branches reported fewer routine requests, but wider access for previously underserved readers was not established. Staff later found outdated records and duplicate entries. Librarians proposed reviewing them, whereas contractors warned that extensive manual checks might delay updates. The network then tested automatic alerts combined with targeted human review, without approving universal adoption. Evaluators would examine successful searches, accessibility, staff time, and correction rates. The catalog remained in operation, but permanent use of the revised verification process depended on further evidence rather than search totals.
残した順序：
- 順序1：公開前に基本形式は合意済み
- 順序2：公開後の検索増と利用成果の違い
- 順序3：誤り発見後に自動＋人手の検証を試行
- 順序4：恒久採用は未承認
要約で誤りが生じやすい12項目
- 時間の前後関係から因果を創作していないか。
- 広告活動・参加者の変化など同時の別要因を無視していないか。
- 提案を実施済みにしていないか。
- すでに完了していた事項を試行後の出来事にしていないか。
- 主張した人と判断した機関を入れ替えていないか。
- 初期結果と後の修正・評価を区別したか。
- 『試行を継続』を『永久に導入』と書いていないか。
- 原文のmay・couldをwillへ強めていないか。
- 観測数と実際の便益を分けたか。
- 原因不明の出来事にbecauseを不用意に使っていないか。
- 英文90〜110語の指定範囲に入っているか。
- 時制・主語・時点・前置詞が一致しているか。
4日間の復習プログラム
- 1日目：修正Q1〜18で時間と条件を整理する。
- 2日目：修正Q19〜36で同時性・因果と政策段階を確認する。
- 3日目：要約A・Bを初見で作り、全文和訳・模範の順序を照合する。
- 4日目：要約Cを自力で書き、3題の語数・主体・時系列を再確認する。
FAQ
英検1級英文要約では時系列の情報を必ず残しますか？
すべての細かな日付を残す必要はありません。しかし、施策の導入前後や最終決定の段階が主張の核心なら、順序を変えないようにします。
afterはbecauseと同じ意味になる場合がありますか？
後に起きた出来事と原因が一致する場合もありますが、afterだけでは因果の立証にはなりません。原文に根拠がない限り要約で原因を創作しないことが重要です。
90〜110語へ短くするとき順番を変えてもよいですか？
文章の並べ方を工夫すること自体は可能ですが、何が先に起き何を根拠に判断したかという意味の関係は保持してください。
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慶英会 塾長｜慶應義塾大学卒・英検1級。中高一貫校の学校英語・NEW TREASURE・英検対策を専門としています。塾長の経歴・指導方針を確認する