Grammar Rule in 30 Seconds
Nominalization turns verbs into nouns to create objective, formal, and dense sentences common in academic and professional English.
- Identify the main action verb and convert it into its noun form (e.g., 'analyze' becomes 'analysis').
- Use the 'The [Noun] of [Object]' structure to maintain clarity and formality in your phrasing.
- Remove the personal subject (I, we, they) to make the statement sound more objective and authoritative.
Overview
We decided to implement the policy（私たちはその政策を導入することを決定した）という動詞中心の文を、The decision for policy implementation was made（政策導入の決定がなされた）のように名詞中心の構造に作り変える技術です。a, the）や前置詞（of, for, to）との組み合わせが複雑になるため、日本人学習者にとっては非常に習得が難しい領域です。本記事では、この「名詞化」をマスターし、ネイティブスピーカーのような洗練された、密度の高い英語を書くための極意を解説します。- 動詞中心:
The committee discussed the proposal thoroughly.（委員会はその提案を徹底的に議論した） - 名詞化:
A thorough discussion of the proposal took place.（その提案に関する徹底的な議論が行われた）
discuss が名詞 discussion に変わり、本来の動詞の役割を took place（行われた）という汎用的な動詞（Light Verb）が担っている点です。日本語の「議論した」が「議論が行われた」になる感覚に非常に近いです。Heavy Noun Phrases と呼びます。名詞の前に形容詞を置き、後ろに前置詞句を伴わせることで、複雑な状況を簡潔に表現できます。- 例:
the rapid development of sustainable energy solutions（持続可能なエネルギー・ソリューションの急速な発展）
- 例:
Scientists analyzed the samples. This analysis revealed...（科学者たちはサンプルを分析した。この分析により……）
analyzed を名詞 analysis で受けることで、文と文が鎖のように繋がります。これは高度なアカデミック・ライティングにおいて必須のテクニックです。decide | decision | 最も一般的。動作の「結果」や「行為そのもの」を表す。 |develop | development | 変化の「プロセス」や、それによって生じた「状態」を指すことが多い。 |perform | performance | 動作の「質」や、継続的な「状態」を表す。 |refuse | refusal | 具体的な「一回限りの行為」や「結果」を指す傾向がある。 |build | the building of | 「～すること」という進行中のニュアンスや、具体的な事象を指す。 |control | control | 形が変わらないもの。increase, decrease, demand など。 |know | knowledge | 語根が変化するもの。fly -> flight, see -> sight など。 |-ing 形の使い方です。実は「動名詞としての -ing」と「純粋な名詞としての -ing」は文法的な振る舞いが異なります。- 動名詞 (Gerund):
Building houses is expensive. - 副詞で修飾でき、目的語を直接取ります。動作の「プロセス」に焦点があります。
- 名詞化 (Nominalization):
The building of houses is expensive. - 形容詞で修飾され、冠詞（
the）が必要で、目的語との間にofが入ります。動作を一つの「事象・概念」として扱います。
The -ing of... という形を使うことで、よりフォーマルで客観的な響きを出すことができます。- Less formal:
We observed that the temperature increased.（温度が上昇したのを私たちは観察した） - More formal:
An increase in temperature was observed.（温度の上昇が観察された）
- Direct:
You must comply with the rules.（規則に従わなければならない） - Professional:
Compliance with the regulations is mandatory.（規制への遵守は義務である）
Compliance（遵守）という概念を主語に据えることで、より厳格で公式な印象を与えます。- Example:
The failure of the engine resulted in the cancellation of the flight.（エンジンの故障が、フライトのキャンセルという結果を招いた）
failure（原因）と cancellation（結果）という2つの名詞を動詞 resulted in で繋いでいます。これにより、論理構成が非常にクリアになります。the を伴うことが非常に多いです。- Incorrect:
Implementation of new system was successful. - Correct:
The implementation of the new system was successful.
- Verb:
We discussed the issue.(前置詞なし) - Noun:
A discussion about/of the issue.(aboutやofが必要) - Verb:
They decided to expand. - Noun:
The decision to expand.(名詞decisionは不定詞toを取ることが多い)
- Bad (Over-nominalized):
The realization of the importance of the implementation of the strategy was achieved. - Better:
The team realized that implementing the strategy was important.
We analyzed the data. | 直接的、活動的。誰がやったかが明確。日常会話やプレゼン向き。 |The data was analyzed. | 動作主に焦点を当てたくない時。中程度のフォーマルさ。 |An analysis of the data was conducted. | 最もフォーマル。分析という「行為」を一つの研究対象として扱う。 |Analyzing the data is crucial. | 動作のプロセスや、一般的な習慣について述べる時。 |Analysis）はもはや完全に一つの「モノ」として確立されています。of が連続する文（例: The evaluation of the implementation of the plan of...）は避けるべきです。名詞化は「情報の凝縮」のために使うものであり、不必要に言葉を飾るためのものではありません。一文の中に名詞化された単語は1つか2つに留めるのが、洗練された英文のコツです。enjoy を enjoyment と名詞化することはできますが、The enjoyment of the movie was great と言うよりは We enjoyed the movie と言う方が自然な場合が多いです。抽象的な概念（analysis, development, implementation）ほど名詞化に適しています。I appreciate your help の方が温かみがあり適切です。一方で、公式な報告や契約上の通知では Your assistance is greatly appreciated や We confirm the receipt of your payment のように名詞化を用いることで、プロフェッショナルな距離感を保つことができます。-ing）に近いです。英語の本格的な名詞化（decision や analysis）は、日本語で言うところの「漢語（熟語）」に近い感覚です。「決めること」ではなく「決定」、「調べること」ではなく「調査」と書くことで、文章の格調が上がりますよね。その感覚を英語でも意識してみてください。Common Verb-to-Noun Suffixes
| Verb | Suffix | Noun Form | Example Sentence |
|---|---|---|---|
|
Analyze
|
-is
|
Analysis
|
The analysis was thorough.
|
|
Develop
|
-ment
|
Development
|
The development is slow.
|
|
Inform
|
-tion
|
Information
|
We need more information.
|
|
Maintain
|
-ance
|
Maintenance
|
The maintenance is costly.
|
|
Refer
|
-ence
|
Reference
|
Make a reference to the text.
|
|
Fail
|
-ure
|
Failure
|
The failure was unexpected.
|
|
Arrive
|
-al
|
Arrival
|
The arrival of the train.
|
|
Decide
|
-sion
|
Decision
|
The decision is final.
|
Meanings
Nominalization is the process of transforming a verb or adjective into a noun. In advanced English, this is used to increase 'lexical density'—the amount of information per clause—and to shift focus from the person doing the action to the action itself.
Formal Abstraction
Using a noun to discuss a concept or process as a fixed entity rather than a fleeting action.
“The investigation into the fraud is ongoing.”
“Our failure to reach a consensus was disappointing.”
Objectivity and Distance
Removing the 'agent' (the person) to make a statement sound like an undeniable fact.
“The discovery of the Higgs boson changed physics.”
“A reduction in spending is required immediately.”
Conciseness in Titles
Using nouns to summarize complex events in headlines or subject lines.
“Economic Recovery Slows Down”
“Staff Recruitment Procedures”
Reference Table
| 動詞 | フォーマルな名詞 | 動詞を使った例文 | 名詞を使った例文 |
|---|---|---|---|
|
Decide
|
Decision
|
We must `decide` by Friday.
|
The `decision` must be made by Friday.
|
|
Analyze
|
Analysis
|
They will `analyze` the data.
|
The `analysis` of the data is complete.
|
|
Implement
|
Implementation
|
We need to `implement` the plan.
|
The `implementation` of the plan is underway.
|
|
Explain
|
Explanation
|
Could you `explain` the concept?
|
A clear `explanation` is required.
|
|
Develop
|
Development
|
The team will `develop` a strategy.
|
The `development` of a strategy is critical.
|
|
Observe
|
Observation
|
I `observed` their behavior.
|
Careful `observation` is key to research.
|
|
Contribute
|
Contribution
|
Everyone should `contribute` ideas.
|
Their `contribution` was highly valued.
|
|
Agree
|
Agreement
|
We need to `agree` on the terms.
|
A mutual `agreement` was reached.
|
フォーマル度スペクトル
The repair of the vehicle is required. (mechanic)
The car needs a repair. (mechanic)
We gotta fix the car. (mechanic)
Car's busted, need a fix. (mechanic)
名詞化の核となる概念：フォーマルな表現のために
それが何であるか
- 行為を概念として Treating actions as abstract ideas.
- 動詞 -> 名詞 Changing word class.
なぜ使うのか？
- フォーマルさ Adds official tone.
- 客観性 Less personal, more detached.
- 簡潔さ Can condense ideas.
一般的な形式
- -ion Decision, information.
- -ment Development, agreement.
- 不規則 Belief, success.
いつ使うか
- 学術論文 Essays, research.
- ビジネスレポート Proposals, summaries.
- 公式声明 Announcements, policies.
動詞 vs 名詞化された形：フォーマルさの対比
この動詞をフォーマルに名詞化すべきか？
文脈はフォーマルですか（学術論文、ビジネスレポート、公式声明など）？
行為者ではなく、「行為/概念」を強調したいですか？
名詞化することで、文がより明確、簡潔、または客観的になりますか？
名詞化された形は広く受け入れられていて、自然に聞こえますか？
名詞化の接尾辞と例
-ion / -tion / -sion
- • decide -> decision
- • inform -> information
- • discuss -> discussion
- • conclude -> conclusion
-ment
- • develop -> development
- • agree -> agreement
- • manage -> management
- • establish -> establishment
-ance / -ence
- • perform -> performance
- • depend -> dependence
- • resist -> resistance
- • exist -> existence
その他 / 不規則
- • arrive -> arrival
- • believe -> belief
- • prove -> proof
- • succeed -> success
レベル別の例文
I like singing.
Me gusta cantar.
Walking is good.
Caminar es bueno.
The dance was fun.
El baile fue divertido.
Cooking is my job.
Cocinar es mi trabajo.
The meeting is at five.
La reunión es a las cinco.
I made a mistake.
Cometí un error.
His choice was bad.
Su elección fue mala.
The flight was late.
El vuelo llegó tarde.
The development of the app took months.
El desarrollo de la aplicación tomó meses.
We need an agreement soon.
Necesitamos un acuerdo pronto.
The performance was amazing.
La actuación fue increíble.
Her explanation was clear.
Su explicación fue clara.
The reduction in costs was necessary.
La reducción de costos fue necesaria.
The discovery of the tomb was a surprise.
El descubrimiento de la tumba fue una sorpresa.
There is a high demand for water.
Hay una gran demanda de agua.
The rejection of the bill caused protests.
El rechazo del proyecto de ley causó protestas.
The implementation of the strategy was flawed.
La implementación de la estrategia fue defectuosa.
The systematic categorization of data is vital.
La categorización sistemática de los datos es vital.
The rapid deterioration of the situation was alarming.
El rápido deterioro de la situación fue alarmante.
The non-compliance of the firm led to fines.
El incumplimiento de la empresa provocó multas.
The reification of abstract concepts can lead to logical fallacies.
La cosificación de conceptos abstractos puede conducir a falacias lógicas.
The proliferation of misinformation poses a threat to democracy.
La proliferación de la desinformación representa una amenaza para la democracia.
The juxtaposition of these two themes creates a stark contrast.
La yuxtaposición de estos dos temas crea un contraste marcado.
The circumvention of the law was meticulously planned.
La elusión de la ley fue planeada meticulosamente.
間違えやすい
Both are used to sound formal and remove the subject.
Learners use -ing when a specific noun exists.
Some words don't change form (e.g., 'increase', 'impact').
よくある間違い
I like play.
I like playing.
The dance is goodly.
The dance is good.
I have a meet.
I have a meeting.
The cook is fun.
Cooking is fun.
The arrive of the bus.
The arrival of the bus.
He made a decide.
He made a decision.
The fail was bad.
The failure was bad.
I need a sign.
I need a signature.
The develop of the project.
The development of the project.
The reaction of the news.
The reaction to the news.
The provide of food.
The provision of food.
The lose of money.
The loss of money.
The realization of the importance of the implementation occurred.
We realized that implementing the plan was important.
The analysis about the data.
The analysis of the data.
The maintenance of the status quo is vital.
Maintaining the status quo is vital.
The non-compliance to the rules.
The non-compliance with the rules.
文型パターン
The ___ of ___ resulted in ___.
There has been a significant ___ in ___.
The ___ to ___ was met with ___.
___ is dependent on the ___ of ___.
Real World Usage
The categorization of participants was based on age.
The optimization of resources led to a 10% profit increase.
The termination of this agreement requires 30 days notice.
Government Announces Reduction in Taxes
Responsible for the coordination of international events.
The patient showed a positive reaction to the treatment.
名詞の語彙を増やしましょう
名詞化しすぎないでください！
「行為」に焦点を当てる
学術英語 vs 日常会話
Smart Tips
Change it to 'The finding was...' or 'The perception is...'.
Check if you have more than two nominalizations. If so, change one back to a verb.
Look up the 'collocation' of the noun. Most are 'of', but 'to' and 'for' are common.
Use nominalized phrases in your 'Skills' section to sound like a professional manager.
発音
Stress Shift
In many nominalizations, the word stress shifts from the verb to the noun.
Suffix Neutrality
Suffixes like -tion are usually unstressed /ʃən/.
Formal Falling
The implementation of the policy ↘
Conveys finality and authority.
暗記しよう
記憶術
Nouns are 'Noun-stoppable' for formal writing! Just add a suffix and an 'of'.
視覚的連想
Imagine a busy factory worker (the Verb) suddenly freezing into a statue (the Noun). The statue is more permanent and formal, but it doesn't move on its own.
Rhyme
When you want to sound quite wise, it's time to nominalize!
Story
A scientist was writing a report. He kept saying 'I did this' and 'I did that.' His boss said, 'Stop being so personal!' So the scientist turned all his actions into statues (nouns) and put them in a museum (the report). Now, everyone respects his 'Analysis' and 'Discovery.'
Word Web
チャレンジ
Take the last three things you did today (e.g., 'I ate lunch') and turn them into formal nominalized sentences (e.g., 'The consumption of the midday meal was completed').
文化メモ
Nominalization is the 'language of power' in universities. Students who use it are often graded higher for 'academic tone.'
In the UK and US, government 'officialese' uses heavy nominalization to avoid taking personal responsibility.
Lawyers use nominalization to make laws apply to 'actions' rather than specific 'people,' making the law universal.
Most English nominalizations come from Latin and French roots (e.g., -tion, -ment).
会話のきっかけ
What is your opinion on the implementation of AI in schools?
How has the development of technology changed your life?
Does the reduction of working hours improve productivity?
What was the reaction to the latest news in your country?
日記のテーマ
よくある間違い
Test Yourself
The board reached a unanimous ___ after a lengthy discussion.
Find and fix the mistake:
The company agreement to the new terms quickly.
Arrange the words in the correct order:
All words placed
Click words above to build the sentence
Score: /3
練習問題
8 exercisesThey <u>analyzed</u> the results thoroughly.
Find and fix the mistake:
The provide of clean water is a human right.
The ________ of the new building will take two years.
There is a high demand ________ skilled workers.
Nominalization always makes a sentence easier to understand.
A: Why was the project delayed? B: It was due to the ________ of the equipment.
Score: /8
Practice Bank
12 exercisesThe continuous ___ of data is crucial for scientific research.
The managers decide the schedule yesterday.
Choose the correct sentence:
Translate into English: 'La mise en place de nouvelles régulations est nécessaire.'
Arrange these words into a sentence:
動詞とその対応するフォーマルな名詞を合わせましょう:
The manager expects an immediate ___ of the problem.
We believe that it is important to improve communication.
Which sentence is correct?
Translate into English: 'They are conducting an investigation into the cause of the incident.'
インフォーマルな行為とフォーマルな名詞化されたフレーズを合わせましょう:
The ___ of the new system will improve efficiency.
Score: /12
よくある質問 (8)
No. A gerund is the -ing form (e.g., 'Running'). Nominalization usually involves a suffix (e.g., 'The act of running'). Nominalization is more formal.
Avoid it in casual conversation, texting, or when you want to be very direct and clear. Don't use it if it makes the sentence too long.
It makes the writing sound objective. It focuses on the facts and data rather than the person who did the research.
This is a nickname for nouns that make a sentence feel dead or heavy, like 'The utilization of' instead of 'using'.
Almost any verb can, but some sound very strange. It is best to stick to verbs that have established noun forms.
Usually, yes, if you are mentioning the object. 'The destruction of the city.' If there is no object, you don't need it: 'The destruction was total.'
Only in very formal speeches, lectures, or news broadcasts. In daily life, it sounds too stiff.
Unfortunately, you have to memorize them. There are patterns, but many are irregular.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
El + Infinitivo / Sustantivación
English has more distinct suffixes for nouns than Spanish.
Nominalisierung
German is more regular; English is highly irregular with suffixes.
Nominalisation
French uses nominalization even more frequently than English in neutral speech.
Koto / No (こと / の)
Japanese is agglutinative; English is derivational.
Masdar (مصدر)
Arabic Masdars are more predictable based on the verb root.
Contextual Nominalization
English uses morphology (suffixes); Chinese uses syntax (word order).
Learning Path
Prerequisites
Learn These First
Continue With
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