
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
英検2級の語句空所補充でsuitable・appropriate・adequate・sufficientをすべて「適切な・十分な」と訳していませんか。suitableは目的や対象に合う、appropriateは場面・規則にふさわしい、adequateは必要な水準を満たす、sufficientは量や証拠などが足りるという意味が中心です。
慶英会では4択20問・意味を保つ書き換え12問・独自長文4題の内容一致12問=計44課題を、全正答・日本語要旨・解説付きで無料公開します。英検協会の公式過去問の転載ではありません。
結論|用途に合うことと十分な量は別
| 形容詞 | 注目する点 | 例文 |
|---|---|---|
| suitable for | 用途・年齢・対象に合う | The book is suitable for beginners. |
| appropriate for/to | 状況・規則・対象にふさわしい | The activities are appropriate for children. |
| adequate for | 必要とされる量・質・水準 | We have adequate chairs for thirty people. |
| sufficient to do | 〜するのに十分 | The evidence is not sufficient to prove the claim. |
| sufficiently+形容詞 | 十分に〜 | The guide is sufficiently clear. |
重要:adequateとsufficientは両方「必要な量を満たす」の意味で置き換えられる文もあります。suitableとappropriateも重なるため、単に微妙な日本語訳だけで一意に正答を決めず、名詞・副詞、to不定詞、文中の評価対象を確認します。
英検2級の試験内容
英検協会の2級試験内容ではReadingが17+6+8問の構成です。この44問は英検2級Reading・Writingで使う評価語の独自練習です。
第1部|品詞・文型を選ぶ4択20問
問1
The safety instructions must be ___ for students aged 12 to 15.
- suitable
- suitably
- suitability
- suiting for
正答・詳しい理由
正答 A(suitable)。suitable for+対象で「その年齢の生徒に適した」。
問2
The organizer wanted a response that was ___ to the seriousness of the problem.
- appropriately
- appropriate
- appropriateness
- appropriating
正答・詳しい理由
正答 B(appropriate)。appropriate to+事柄の重大さにふさわしい。
問3
The hall has ___ space for the thirty registered visitors, but not for another fifty.
- adequacy
- adequately
- adequate
- adequateness
正答・詳しい理由
正答 C(adequate)。adequate space for=必要な30人分の場所が確保されている。
問4
The library has ___ funds to run the trial for three weeks.
- sufficiency
- sufficiently
- suffice
- sufficient
正答・詳しい理由
正答 D(sufficient)。sufficient funds to do=3週間実施するのに十分な資金。
問5
The lesson was not ___ for children who had only recently begun learning English.
- suitable
- suitability
- suitably
- suiting
正答・詳しい理由
正答 A(suitable)。be suitable for+学習対象。
問6
The guide asked everyone to use the tools ___ during the practice.
- appropriate
- appropriately
- appropriateness
- appropriating
正答・詳しい理由
正答 B(appropriately)。副詞appropriatelyが動詞useを修飾。
問7
The school checked whether the number of trained instructors was ___.
- adequacy
- adequately
- adequate
- adequateness
正答・詳しい理由
正答 C(adequate)。be adequate=必要数を満たしている。量の十分性。
問8
The information was ___ clear for first-time users to follow.
- sufficient
- sufficiency
- suffice
- sufficiently
正答・詳しい理由
正答 D(sufficiently)。sufficiently+形容詞+for someone to do。十分明瞭。
問9
The new material may be ___ for classes studying environmental problems.
- suitable
- suitably
- suitability
- suiting
正答・詳しい理由
正答 A(suitable)。suitable for classes=その授業用途に適する。
問10
Teachers must choose an ___ difficulty level for each group.
- appropriately
- appropriate
- appropriateness
- appropriating
正答・詳しい理由
正答 B(appropriate)。appropriate+名詞level。
問11
The staff did not have an ___ supply of batteries for the full weekend.
- adequacy
- adequately
- adequate
- adequateness
正答・詳しい理由
正答 C(adequate)。an adequate supply of=必要な量の在庫。
問12
There was ___ time to check the records before the meeting.
- suffice
- sufficiency
- sufficiently
- sufficient
正答・詳しい理由
正答 D(sufficient)。sufficient time to+原形=十分な時間。
問13
The room is ___ for small discussions but not for running experiments with chemicals.
- suitable
- suitability
- suitably
- suit
正答・詳しい理由
正答 A(suitable)。用途との適合suitable for。
問14
The volunteer responded ___ when someone asked about a private record.
- appropriate
- appropriately
- appropriateness
- appropriating
正答・詳しい理由
正答 B(appropriately)。個人情報に関する質問への対応方法を副詞で示す。
問15
The center needs ___ equipment to make sure every group can participate safely.
- adequacy
- adequately
- adequate
- adequateness
正答・詳しい理由
正答 C(adequate)。adequate equipmentは必要な設備の量・質。
問16
The printed maps were not ___ detailed to explain every road closure.
- sufficient
- sufficiency
- suffice
- sufficiently
正答・詳しい理由
正答 D(sufficiently)。sufficiently detailed=十分に詳しい。
問17
Staff should select ___ reading material for younger learners.
- suitable
- suitability
- suitably
- suit
正答・詳しい理由
正答 A(suitable)。suitable material=対象に合う教材。
問18
A supervisor must decide whether it is ___ to open the damaged room yet.
- appropriately
- appropriate
- appropriateness
- appropriating
正答・詳しい理由
正答 B(appropriate)。appropriate to doで状況にふさわしい判断。
問19
The project lacked ___ data to establish a long-term result.
- adequacy
- adequately
- adequate
- adequateness
正答・詳しい理由
正答 C(adequate)。adequate data=結論を支えるのに足るデータ。
問20
The current evidence is not ___ to prove that the service improves grades.
- suffice
- sufficiency
- sufficiently
- sufficient
正答・詳しい理由
正答 D(sufficient)。be sufficient to doで証明に十分な根拠。
第2部|意味を保つ書き換え12問
「用途に合う」「十分な量がある」「根拠が足りない」の判断を変えずに英文にしてください。
問21
The room fits a small seminar but is not right for a large laboratory activity.
模範の英文と解説
The room is suitable for a small seminar but not for a large laboratory activity.
用途への適合をsuitable forで説明。
問22
The teacher answered the sensitive question in a proper manner.
模範の英文と解説
The teacher responded appropriately to the sensitive question.
応答の仕方がふさわしいという副詞。
問23
There are enough chairs for the thirty accepted participants.
模範の英文と解説
There are adequate chairs for the thirty accepted participants.
30人分は足りるが無制限ではない。
問24
We have enough time to inspect the devices before Friday.
模範の英文と解説
We have sufficient time to inspect the devices before Friday.
点検に必要な時間が足りる。
問25
The workbook is right for students who already know the basics.
模範の英文と解説
The workbook is suitable for students who already know the basics.
学習段階に合っている。
問26
The visitors spoke to the staff in a respectful and proper way.
模範の英文と解説
The visitors spoke to the staff appropriately.
場にふさわしく話したという意味。
問27
The survey has too few answers to support the claim.
模範の英文と解説
The survey does not contain adequate responses to support the claim.
十分な回答がないという否定。
問28
The map is not clear enough for visitors to find the entrance.
模範の英文と解説
The map is not sufficiently clear for visitors to find the entrance.
十分な明瞭さの否定。
問29
The school selected tasks that matched the children’s age.
模範の英文と解説
The school selected tasks suitable for the children’s age.
年齢に適していることを保持。
問30
The manager decided that announcing the result before checking the data would be improper.
模範の英文と解説
The manager decided it would not be appropriate to announce the result before checking the data.
未確認結果の公表は適切でない。
問31
The library had enough trained staff for its initial two sessions.
模範の英文と解説
The library had adequate trained staff for its initial two sessions.
最初の2回に対する人員の量。
問32
The available records were not enough to identify the exact cause.
模範の英文と解説
The available records were not sufficient to identify the exact cause.
原因の確定に足りない。
第3部|独自4長文・内容一致12問
学校の教材選定、公民館の安全講座、公園の日よけ、図書館のウェブ案内を題材にした慶英会の独自英文です。
長文1|学校の英語教材と学習段階
A private school evaluated several new English reading materials. One book was suitable for beginners because it used short sentences and familiar topics. Another had a higher level of difficulty and was intended for students preparing for more advanced exams. Teachers needed to select appropriate materials for each class rather than simply choosing the longest text. The school had adequate copies for the initial trial, but not enough for every grade. It collected student feedback, yet that evidence was not sufficient to prove an improvement in examination scores.問33|Why was one book suitable for beginners?
- It used short sentences and familiar topics
- It contained the longest articles
- It required university knowledge
- It was the most expensive
問34|What was true about the number of copies?
- There were enough for every grade
- There were enough for the trial, but not all grades
- No books were available
- All copies were sold
問35|What did student feedback NOT prove?
- That students gave comments
- That materials were compared
- Higher examination scores
- That books had different levels
日本語要旨・正答と根拠
学校は読解教材を比較し初学者用と上級者用を分けた。教材の長さではなく学習段階に応じた適切さを判断。最初の試行には十分な冊数があったが全学年分はない。学力改善の根拠は不足。
問33:A(It used short sentences and familiar topics)。beginner suitability=文の短さと既知の話題。
問34:B(There were enough for the trial, but not all grades)。adequate for trial only。
問35:C(Higher examination scores)。feedback not sufficient for score gains。
長文2|公民館の防災講座と設備
A community center was preparing a weekend safety workshop. The organizers chose a room suitable for small group activities, but a larger lecture would require a different location. The center had an adequate number of protective gloves for the thirty registered participants. However, there were not enough for another twenty people who wanted to join. Staff explained the restrictions carefully and did not promise that the waiting-list applicants would be accepted. The safety information was not yet sufficiently detailed for visitors to handle the equipment without supervision.問36|What is the room suitable for?
- Small group activities
- A national sports stadium
- Heavy construction
- Unlimited participants
問37|For how many registered participants are gloves adequate?
- Twenty
- Thirty
- Fifty
- One hundred
問38|Why is supervision still needed?
- No workshop was planned
- The center has no protective equipment
- The safety information is not sufficiently detailed
- Every participant passed an exam
日本語要旨・正答と根拠
公民館は少人数の防災講座に適した部屋を確保。登録者30人分の手袋はあるが追加20人分はない。キャンセル待ちの採用は未確定で、安全説明は単独作業できるほど十分に詳しくない。
問36:A(Small group activities)。用途はsmall group activities。
問37:B(Thirty)。30人分。
問38:C(The safety information is not sufficiently detailed)。独りで作業するには情報不足。
長文3|町の公園の暑さ対策
A town tested temporary shade covers in two areas of a public park. Officials selected materials that were suitable for outdoor use. They also allocated enough funds to inspect and clean the covers during the three-month trial. Measurements on sunny afternoons showed lower surface temperatures in some covered spots, but researchers had not recorded electricity use in nearby buildings. They agreed that it would be inappropriate to claim that the covers had reduced the town’s overall energy costs. The collected evidence was not sufficient for that broader conclusion.問39|What materials did the town choose?
- Materials suitable for outdoor use
- Only paper copies
- Books for an indoor classroom
- Unprotected electrical cables
問40|What was covered by allocated funds?
- A permanent townwide system
- Inspection and cleaning during the three-month trial
- Every resident’s energy bill
- A new train route
問41|Which claim would be inappropriate?
- Some surface temperatures were lower
- A trial was carried out in two areas
- Townwide energy costs had been proven to fall
- Materials were selected for outdoor use
日本語要旨・正答と根拠
町は公園2地点で屋外利用に合った日よけを試し、3か月の管理費を確保。覆われた一部地点の表面温度は低かったが建物の電力使用量は測っていないため町全体の省エネ効果は断定できない。
問39:A(Materials suitable for outdoor use)。屋外用途に適した材質。
問40:B(Inspection and cleaning during the three-month trial)。初期試行の点検・清掃費。
問41:C(Townwide energy costs had been proven to fall)。電力使用量未測定で町全体の省エネ主張はできない。
長文4|図書館のウェブ案内と利用環境
A public library added a new online guide for first-time users. Staff tried to make the instructions suitable for readers with different levels of English. They included large diagrams and short explanations, but some visitors said that the text was still not sufficiently clear about returning borrowed devices. The library had adequate staff for answering questions during normal opening hours, yet it could not provide the same assistance late in the evening. Officials planned to revise the guide after examining feedback from more visitors.問42|For whom was the guide intended?
- Readers with different English abilities
- Only professional historians
- Only the library director
- Visitors who never use devices
問43|What part was not sufficiently clear?
- The library’s history
- Instructions for returning borrowed devices
- The name of every employee
- The price of bus tickets
問44|When were staff numbers adequate for answering questions?
- At every hour of every day
- Only on national holidays
- During normal opening hours
- Only after midnight
日本語要旨・正答と根拠
図書館は様々な英語レベルの利用者向けに図と短文を入れたガイドを作成したが、返却方法の説明はまだ十分に明確ではないという声がある。通常時間には相談対応できる人員がいるが夜間までは対応できない。
問42:A(Readers with different English abilities)。different levels of English。
問43:B(Instructions for returning borrowed devices)。返却方法の説明が不足。
問44:C(During normal opening hours)。adequate during normal hours。
間違いやすい英語
| 誤り | 修正 |
|---|---|
| The book is suitability for students. | The book is suitable for students. |
| The instructions were appropriate clear. | The instructions were sufficiently clear. |
| We have adequate to run the course. | We have adequate resources to run the course. |
| 設備がadequate=どんな活動にも使える | どの人数・用途・水準に足りるのか確認する |
7日間の復習
- 1〜2日目:4択20問を10問ずつ。
- 3〜4日目:書き換え12問を6問ずつ。
- 5〜6日目:4長文12問を2題ずつ、評価対象を確認。
- 7日目:英検公式過去問で必要条件と十分性を整理する。
よくある質問
suitableとappropriateは同じですか?
用途や対象への適合という意味が重なります。appropriateは場面・社会的なふさわしさを示す場合もあります。
adequateとsufficientはどう違いますか?
どちらも必要量を満たすという意味があり、文脈で置き換えられる場合も多くあります。sufficient to doなどの構文に注目してください。
evidence is sufficientは何を示しますか?
ある結論を支持する証拠が十分という評価ですが、具体的な証拠の内容や測定方法まで本文で確認しましょう。
公式過去問ですか?
いいえ。慶英会独自の44課題です。
関連無料教材
中高一貫校の英語と英検2級の内容一致・英作文をまとめて強化したい方は慶英会の最大1か月完全無料体験・学習相談をご利用ください。
公式情報
公益財団法人日本英語検定協会|2級試験内容。教材本文・44問題はすべて慶英会独自制作です。
用途にsuitableか、選考基準にappropriateかを学んだ後は:choose・select・decide・determineの独自44問で、資料・人・場所の選抜と最終判断を読む長文を練習できます。
suitable・adequateから「時間をかける価値」の表現へ:英検2級worth・worthy・worthwhileの違い44問で、worthy ofとworth doingを学べます。
英検対策を個別に相談したい保護者様へ

慶英会 塾長|慶應義塾大学卒・英検1級
塾長の経歴・指導方針を確認する
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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
