Grammar Rule in 30 Seconds
'People' is always plural in English, so it pairs with 'do', never 'does'.
- Use 'do' for 'people' because it acts like 'they' (e.g., People do care).
- Use 'does' for 'person' because it acts like 'he' or 'she' (e.g., That person does care).
- In questions, always start with 'Do people...?' (e.g., Do people like this?).
Overview
do と does の使い分けは、初級から中級へとステップアップする際の最大の関門の一つと言えます。これらは「現在形（Simple Present）」において、否定文や疑問文を作るために欠かせない「助動詞（Auxiliary Verbs）」としての役割を担っています。日本語を母国語とする私たちにとって、この do と does がなぜこれほどまでに厄介なのか。それは、日本語の動詞の仕組みと英語の「主語と動詞の一致（Subject-Verb Agreement）」というルールが根本的に異なっているからです。-s や -es のルールが、助動詞である do にも適用され、does という形を生み出します。do と does を正しく使いこなすことは、単に文法テストで点数を取るためだけではありません。相手に自分の意図を正確に伝え、自然で知的な響きを持つ英語を話すための基盤となります。例えば、ビジネスの会議で「彼はそのプロジェクトを知っていますか？」と聞きたい時に、Do he know...? と言ってしまうと、相手には意味は通じますが、少し幼い、あるいは不自然な印象を与えてしまう可能性があります。本稿では、日本人が陥りやすい罠を回避しながら、do と does の本質的な違いと、それを無意識に使い分けるための思考プロセスを深く掘り下げていきましょう。do と does は、言語学的に「ダミーの助動詞（Dummy Auxiliaries）」と呼ばれることがあります。これは、本来の動詞（本動詞）だけでは否定文や疑問文を作ることができない場合に、助っ人として登場するからです。日本語では「食べない」「食べますか？」のように、動詞の語尾を変化させるだけで済みますが、英語（特に be 動詞以外の一般動詞）では、この「助っ人」の力を借りるのが基本ルールです。I（一人称）でも You（二人称）でもなく、かつ「一人・一つ（単数）」である場合にのみ、特別な形をとります。これが does です。具体的には、以下の表のような関係性になります。I | do |You | do |He, She, It, Tanaka-san, The company | does |We | do |They, The students, My parents | do |does を使うのは「自分とあなた以外の誰か一人（または一つ）」の時だけです。それ以外はすべて do を使います。非常にシンプルに聞こえますが、実際の会話では「私の兄（My brother）」や「その電車（The train）」が主語になった瞬間に、does への切り替えを忘れてしまうのが日本人の共通の悩みです。He works hard.（彼は一生懸命働く）と言っていた場合、動詞 work には三単現の -s が付いています。しかし、疑問文や否定文で does が登場すると、この -s のエネルギーはすべて does に吸収されます。その結果、後ろに続く本動詞は「原形（Base Form）」、つまり何も付かない元の形に戻ります。- 肯定文:
She likes sushi. - 否定文:
She does not like sushi.（likesではなくlikeになる） - 疑問文:
Does she like sushi?（likesではなくlikeになる）
does が出たら後ろの動詞はハダカ（原形）に戻る」というルールは、英語の論理性を象徴しています。一つの文の中で、三単現の印を二度も付ける必要はない、という効率的な考え方なのです。do not または does not を挟みます。日常会話やビジネスメールでは、短縮形の don't や doesn't が頻繁に使われます。- パターン: 主語 +
don't / doesn't+ 動詞の原形
not | 動詞の原形 | 例文 |I | don't | have | I don't have a pen. |You | don't | need | You don't need to hurry. |He | doesn't | smoke | He doesn't smoke anymore. |She | doesn't | understand | She doesn't understand Japanese. |It | doesn't | rain | It doesn't rain much here. |We | don't | want | We don't want to be late. |They | don't | agree | They don't agree with the plan. |Do または Does を文頭に置きます。文末にはクエスチョンマークを忘れずに。- パターン:
Do / Does+ 主語 + 動詞の原形 ...?
Do you live in Tokyo?（あなたは東京に住んでいますか？）Does your father work on weekends?（あなたのお父さんは週末に働きますか？）Do they play tennis?（彼らはテニスをしますか？）
your father のように「単数」である場合、即座に Does を選べるかどうかが、B1レベルの習熟度の目安となります。Who, What, Where, When, Why, How などの疑問詞を使う場合も、基本は Yes/No 疑問文と同じ構造です。疑問詞を一番前に置くだけです。- パターン: 疑問詞 +
do / does+ 主語 + 動詞の原形 ...?
Where do you want to go?（どこに行きたいですか？）What does she do for a living?（彼女の職業は何ですか？）How often do you exercise?（どのくらいの頻度で運動しますか？）
Who や What 自体が「主語」になる場合、do や does は使いません。そのまま動詞を三単現の形（-s 付き）にします。Who lives in this house?（誰がこの家に住んでいますか？）- ×
Who does live in this house?（強調する場合を除き、間違いです）
do と does を使う「現在形」は、実は「今この瞬間」のことを表すよりも、「普段のこと」や「変わらない事実」を表す際に使われます。具体的なシチュエーションを見てみましょう。Do you check your emails before breakfast?（朝食前にメールをチェックしますか？）He doesn't take the train to work; he drives.（彼は電車で通勤せず、車で行きます。）How do you usually spend your weekends?（普段、週末はどのように過ごしますか？）
Does water boil at 100 degrees Celsius?（水は摂氏100度で沸騰しますか？）The sun doesn't rise in the west.（太陽は西から昇りません。）Does this bus go to Shinjuku Station?（このバスは新宿駅に行きますか？）
I don't like spicy food.（私は辛い食べ物が好きではありません。）Does she speak English fluently?（彼女は英語を流暢に話しますか？）They don't live together anymore.（彼らはもう一緒に住んでいません。）
Does your company offer remote work options?（御社はリモートワークの選択肢を提供していますか？）We don't require a written application for this position.（この職種には書面での応募は必要ありません。）Do you have any questions about the contract?（契約について何か質問はありますか？）
-s」の罠 (The Double -s Trap)does を使っているのに、後ろの動詞にも -s を付けてしまうミスです。- 誤:
Does he likes coffee? - 正:
Does he like coffee?
He likes と丸暗記してしまいます。その結果、疑問文になっても likes の形を崩すことに心理的な抵抗を感じてしまうのです。does が -s を盗んでいった、とイメージしましょう。be 動詞との混同 (The be Verb Confusion)do/does を使うべきところに am/is/are を使ってしまう、あるいはその逆のミスです。- 誤:
Are you like sushi?/Do you tired? - 正:
Do you like sushi?/Are you tired?
like は「一般動詞（動作や状態を表す）」、tired は「形容詞（様子を表す）」と厳密に区別されます。一般動詞の疑問文には do/does が必要で、形容詞や名詞を説明する時には be 動詞が必要です。do/does の欠落 (Missing Auxiliary in Negatives)- 誤:
I not know./He not come. - 正:
I don't know./He doesn't come.
not だけを置いてしまいがちです。英語の一般動詞を否定するには、必ず do/does という「支え」が必要であることを忘れないでください。do と does の理解を深めるために、他の似た構造と比較してみましょう。do/does vs. am/is/are (一般動詞 vs. be 動詞)He works. | He is a worker. |He doesn't work. | He isn't a worker. |Does he work? | Is he a worker? |do vs. 本動詞としての dodo 自体が「〜をする」という動作を表す動詞として使われることがあります。この場合、疑問文では do が2回登場することになりますが、これは間違いではありません。What do you do?（あなたは何をしていますか？ / お仕事は何ですか？）- 最初の
do：助動詞（疑問文を作るための助っ人） - 2番目の
do：本動詞（「する」という動作） She doesn't do her homework.（彼女は宿題をしません。）doesn't：否定の助動詞do：本動詞（「する」という動作）
Do you smoke?（タバコを吸いますか？ ＝ 習慣としての喫煙）Are you smoking?（今、タバコを吸っていますか？ ＝ 目の前の動作）
does を使うべきか do を使うべきか、瞬時に判断できません。コツはありますか？I)」でも「あなた (You)」でもなく、かつ「一人・一つ」かどうかをチェックする癖をつけましょう。これを「三人称単数」と呼びますが、慣れるまでは「自分とあなた以外の第三者の一人」と考えると分かりやすいです。練習として、身の回りの人（お母さん、上司、友達）を主語にして、否定文を作る練習を繰り返すと、脳の回路が繋がってきます。My parents は？do を使います。My parents don't like... や Do your friends know...? となります。does はあくまで「単数（一人・一つ）」専用の特別な形だと覚えておきましょう。They（彼ら）も複数なので do です。do や does を使うことはありますか？I do like her! と言います。この場合、do に強くアクセントを置いて発音します。三単現なら He does like her! となります。これは B1 レベルから B2 レベルへと進む際に便利な表現です。Who の疑問文では、なぜ does を使わないのですか？Who が主語の役割を兼ねている場合、英語では「肯定文と同じ語順」にするというルールがあるからです。また、Who は通常、単数として扱われるため、動詞には -s を付けます（例：Who knows?）。ただし、Who do you like? のように、you が主語で Who が目的語（誰「を」）の場合は、通常通り do を使います。この違いを意識できるようになると、文法マスターに一歩近づきます。Conjugating 'Do' with People vs. Person
| Subject Type | Subject | Affirmative | Negative | Question |
|---|---|---|---|---|
|
Singular
|
A person
|
does
|
doesn't
|
Does a person...?
|
|
Plural
|
People
|
do
|
don't
|
Do people...?
|
|
Singular Pronoun
|
He/She/It
|
does
|
doesn't
|
Does he...?
|
|
Plural Pronoun
|
They
|
do
|
don't
|
Do they...?
|
|
Singular Group
|
Everyone
|
does
|
doesn't
|
Does everyone...?
|
|
Specific Group
|
The crowd
|
does/do*
|
doesn't/don't*
|
Does/Do the crowd...?
|
Common Contractions
| Full Form | Contraction | Usage Example |
|---|---|---|
|
People do not
|
People don't
|
People don't like waiting.
|
|
Person does not
|
Person doesn't
|
That person doesn't know.
|
Meanings
The verb 'do' is used with plural subjects (I, you, we, they), while 'does' is used for third-person singular subjects (he, she, it). Since 'people' is the plural form of 'person', it requires the plural verb form 'do'.
General Plurality
Referring to a group of individuals as a collective plural entity.
“People do not always agree on politics.”
“Why do people wait in line for hours?”
Ethnic/National Groups
Using 'people' as a singular countable noun to mean a nation or ethnic group (rare, but important for B1+).
“The Japanese are a people that does value tradition.”
“Every people does have its own unique history.”
Reference Table
| 主語 | 肯定文の動詞 | 否定形 | 疑問形 |
|---|---|---|---|
|
I / you / we / they
|
I go.
|
They **do not** (don't) go.
|
**Do** you go?
|
|
he / she / it
|
She go**es**.
|
He **does not** (doesn't) go.
|
**Does** it go?
|
|
複数名詞 (the cats)
|
The cats play.
|
The cats **do not** (don't) play.
|
**Do** the cats play?
|
|
単数名詞 (the cat)
|
The cat play**s**.
|
The cat **does not** (doesn't) play.
|
**Does** the cat play?
|
|
your friends
|
Your friends know.
|
Your friends **don't** know.
|
**Do** your friends know?
|
|
your friend
|
Your friend know**s**.
|
Your friend **doesn't** know.
|
**Does** your friend know?
|
フォーマル度スペクトル
It is observed that people do provide assistance when requested. (Community behavior)
People do help each other in this neighborhood. (Community behavior)
People do be helping out, you know? (Community behavior)
Folks do be helping. (Community behavior)
Do vs. Does の使い分けマップ
DO を使うのは...
- I / You Do you agree?
- We / They We don't know.
- 複数名詞 Do the kids want ice cream?
DOES を使うのは...
- He / She / It She doesn't live here.
- 単数名詞 Does the store have milk?
- 不定代名詞 Does anyone know?
ひと目でわかる Do と Does
どっちを選ぶ？ フローチャート
主語は he, she, it, または単数名詞ですか？
主語は I, you, we, they, または複数名詞ですか？
「Do」チームと「Does」チーム
DO チーム
- • I
- • You
- • We
- • They
- • My friends
- • The books
DOES チーム
- • He
- • She
- • It
- • My friend
- • The book
- • Everybody
レベル別の例文
People do like music.
People like music.
Do people eat here?
Do people eat here?
People do not sleep in class.
People don't sleep in class.
Many people do yoga.
Many people do yoga.
People don't usually work on Sundays.
People don't usually work on Sundays.
Why do people buy expensive cars?
Why do people buy expensive cars?
Some people do their best every day.
Some people do their best every day.
Do people in your country drink tea?
Do people in your country drink tea?
Most people do not realize how much time they spend on their phones.
Most people don't realize how much time they spend on their phones.
Do people really think that this plan will work?
Do people really think that this plan will work?
People who do exercise regularly feel much better.
People who exercise regularly feel much better.
Rarely do people find such a great opportunity.
Rarely do people find such a great opportunity.
The people of this city do not appreciate the new tax laws.
The people of this city do not appreciate the new tax laws.
Whether or not people do agree with the decision is irrelevant.
Whether or not people agree with the decision is irrelevant.
Do people in management positions always have to work late?
Do people in management positions always have to work late?
It is essential that people do their part to protect the environment.
It is essential that people do their part to protect the environment.
Seldom do people acknowledge the complexity of the issue.
Seldom do people acknowledge the complexity of the issue.
The very people who do the most work are often paid the least.
The very people who do the most work are often paid the least.
Do people not understand that resources are limited?
Do people not understand that resources are limited?
Only when people do come together can real change happen.
Only when people come together can real change happen.
Lest people do forget, history has a way of repeating itself.
Lest people forget, history has a way of repeating itself.
The indigenous people, as a singular entity, does possess unique rights.
The indigenous people, as a singular entity, does possess unique rights.
Hardly do people ever question the status quo in this society.
Hardly do people ever question the status quo in this society.
Should people do as they are told, the system functions perfectly.
Should people do as they are told, the system functions perfectly.
間違えやすい
Learners think because both refer to a group, they conjugate the same way.
In some dialects, 'family' can take 'do', leading to confusion with 'people'.
Seeing 'a people' in a book and thinking 'people' can be singular in all cases.
よくある間違い
People does like pizza.
People do like pizza.
Does people live here?
Do people live here?
The people is happy.
The people are happy.
One people do it.
One person does it.
People doesn't know.
People don't know.
Why does people say that?
Why do people say that?
Every people do this.
Everyone does this.
Most people does their work.
Most people do their work.
A person do what they can.
A person does what they can.
The people in my office does not like the coffee.
The people in my office do not like the coffee.
Seldom does people realize...
Seldom do people realize...
The Japanese people does...
The Japanese people do...
文型パターン
Do people in ___ usually ___?
Most people do not ___ because ___.
Why do people ___ when they ___?
The things that people do for ___ are ___.
Real World Usage
Do people know about the party?
I like to see how people do under pressure.
Why do people do this? SMH.
Do people speak English in this village?
People do not recommend the extra spicy sauce.
The people do not support the new law.
「S」のルール
does に隠れていると考えてみて。 He walks と同じように、he/she/it の時だけ特別な does を使います。 He does his homework.
「S」の二度漬け禁止！
does を使ったら、メインの動詞は元の形に戻します。 Does he play soccer?が正解で、plays にはしません。
置き換えテクニック
The team なら it なので Does the team win?、
My friends なら they なので Do my friends know?と判断できます。
アメリカ vs イギリス
team などの集団は単数扱いですが、イギリスではメンバー個々を意識して複数扱いすることもあります。 The committee do not agree.
Smart Tips
Stop and think of the word 'They'. You would never say 'They does', right?
Check your relative clauses. If you write 'People who does...', change it to 'People who do...'
Draw a small '1' over everyone and a '2+' over people to remind you of the verb form.
Always start with 'Do people...'. It's a fixed phrase you can memorize.
発音
Reduction of 'do'
In the phrase 'Do people...', the 'do' is often reduced to a short /də/ sound.
Linking
The 'p' in people is aspirated. When saying 'don't people', the 't' often becomes a stop or disappears.
Question Rise
Do people LIKE it? ↗
Standard yes/no question intonation.
暗記しよう
記憶術
People are many, so 'do' is the penny—always plural, never singular!
視覚的連想
Imagine a huge crowd of people all holding a giant letter 'O' (from DO). A single person is holding a letter 'S' (from DOES).
Rhyme
One person does, but people do. This is always, always true!
Story
In a small village, one man (the Person) always 'does' the laundry alone. But when the whole village (the People) comes together, they 'do' the laundry in the river together. The 'S' in 'does' is for 'Solo'.
Word Web
チャレンジ
Look around you in a public place. Write 5 sentences about what the 'people' there are doing using 'do' or 'don't'.
文化メモ
Americans use 'people' very frequently in political discourse ('The American people do...').
In the UK, collective nouns like 'the team' or 'the government' can take 'do', making 'people do' feel even more natural.
The word 'folks' is often used instead of 'people', but it follows the same 'do' rule.
From Old French 'pople', from Latin 'populus' (a people, nation, body of citizens).
会話のきっかけ
Do people in your country celebrate New Year's Eve?
Why do people spend so much money on weddings?
Do people in your profession usually work from home?
What do people do for fun in your hometown?
日記のテーマ
よくある間違い
Test Yourself
My cat ___ like to be woken up from his nap.
正しい文を選んでください：
Find and fix the mistake:
They doesn't have the key for the apartment.
Score: /3
練習問題
8 exercisesMost people ___ (do/does) not like working on Saturdays.
Find and fix the mistake:
Why does people always forget their umbrellas?
That person ___ not have a ticket, but these people ___.
He doesn't like spicy food. -> ___
The word 'people' is a singular collective noun in English.
A: Do people usually tip here? B: Yes, they ___.
Select all subjects that use 'do'.
1. People, 2. Everyone, 3. A person
Score: /8
Practice Bank
13 exercises___ you know how to get to the train station from here?
It ___ seem like a good idea to start now; it's too late.
正しい文を選んでください：
Why do that machine make so much noise?
主語と正しい形を組み合わせてください：
英語に訳してください： '彼女は私たちと一緒に来たいですか？'
単語を並べ替えて文を作ってください：
What ___ people usually do on this holiday?
正しい文を選んでください：
It don't matter what I think.
単語を並べ替えて質問を作ってください：
英語に訳してください： '彼はあまり頻繁に運動しません。'
文のパーツを組み合わせてください：
Score: /13
よくある質問 (8)
Only when referring to an ethnic group or nation (e.g., 'The Cherokee are a people'). In 99% of cases, it is plural.
Probably because your native language (like Spanish or French) treats the word for people as a singular noun.
The singular is 'person'. One person does, two people do.
Yes, but only if you are talking about multiple different ethnic groups (e.g., 'The peoples of Africa').
No! 'Everyone' is singular and takes 'does'. This is a very common point of confusion.
It is always 'people don't'.
No, 'people' is plural in all dialects of English.
Use the 'They' test: if you can say 'They do', you must say 'People do'.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
La gente
Spanish 'gente' is singular; English 'people' is plural.
Les gens / Tout le monde
English 'people' matches 'les gens', not 'tout le monde'.
Die Leute
The logic is identical to English.
人々 (Hitobito)
Japanese has no subject-verb agreement.
الناس (An-nas)
Arabic has more complex plural types, but 'people' is straightforwardly plural.
人们 (Rénmen)
No plural/singular verb distinction in Chinese.
Learning Path
Prerequisites
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【英語の基礎】do / does / did の使い分けをマスターしよう！
Hapa 英会話
【中学英語】doとdoesの使い分けを5分で完璧にする
Atsueigo
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Let them vs. Let they: 違いは何ですか？
### Overview 英語を学習する際、多くの日本人が最初に直面する壁の一つが「代名詞の格（Case）」の変化です。日本語では「彼」...
Quite vs. Quiet: 違いは何ですか？
### 概要 (Overview) 英語を学習する上で、多くの日本人学習者が頭を悩ませるのが「スペルが似ているけれど意味が全く異なる単...
Said vs. Told: 違いは何ですか？
### Overview 英語を学習している皆さんにとって、`say` と `tell` の使い分けは、中級レベル（B1）に到達する際に必ずと言って...
