Grammar Rule in 30 Seconds
Indirect questions make you sound polite by nesting a question inside a phrase like 'Do you know...?' using statement word order.
- Use statement word order (Subject + Verb) instead of question order. Example: 'where he is' not 'where is he'.
- Remove auxiliary verbs like 'do', 'does', or 'did'. Example: 'where she lives' not 'where does she live'.
- Use 'if' or 'whether' for Yes/No questions. Example: 'I wonder if it will rain'.
Overview
indirect questions（間接疑問文）です。これは英語における「丁寧さのフィルター」です。洗練された、控えめで、親しみやすい印象を与えてくれます。InstagramでDMを送るときも、上司にZoomのリンクを聞くときも、この形はあなたの強い味方になります。ぶっきらぼうな要求を、温かいお願いに変えてくれるのです。「Wi-Fiのパスワードを教えろ」と「Wi-Fiのパスワードを教えていただけないでしょうか？」の違いのようなものです。前者は強盗のようですが、後者は友好的な会話に聞こえます。このガイドでは、文章をひっくり返し、語順を正しく保つ方法を見ていきます。Netflixのアルゴリズムを理解するより簡単ですので、安心してください。さらに、これを使うことで、社会的な空気を読めるプロのように見えます。How This Grammar Works
Could you tell me... や Do you know... といった「丁寧な導入部」です。内側の人形は、あなたが本当に知りたい情報です。しかし、ここで注意点があります。質問を別のフレーズの中に入れると、それは質問ではなくなり、普通の肯定文（述語文）のように振る舞い始めます。ここが皆が混乱するポイントです。普通の質問では、主語と動詞をひっくり返します。「Where is the coffee?」と言いますね。しかし間接疑問文では、それらを元の位置に戻します。「Could you tell me where the coffee is?」お気づきですか？ is が最後に移動しました。文章がリラックスしているような感じです。丁寧な導入部がすべての重労働を引き受けてくれているので、もう背筋を伸ばして「質問」である必要はないのです。あなたは本質的に「ねえ、お願いがあるんだけど、知りたいのはこの事実なんだ」と言っているのです。スムーズでスマート、2005年のAIボットのような響きを避けられます。丁寧なフレーズ ＋ 疑問詞 ＋ 肯定文の語順。これだけで、あなたは外交官のようです。
Formation Pattern
Can you tell me... は友達に最適です。 I was wondering if... は、印象を良くしたい教授にぴったりです。
who, what, where, why, how があれば、そのまま使いましょう！もし「Yes/No」で答える質問（例：「雨降ってる？」）なら、 if か whether を追加する必要があります。
do, does, did を使っているなら、ゴミ箱に捨てましょう。彼らは間接疑問文のパーティーには招待されていません。
does が消えて、 s が動詞の starts に移動しました。手品のようですが、もっと文法的な仕組みです。
Could you tell me | 教えていただけますか...
where | どこに...
the nearest gym | 一番近いジムが...
is? | あるか？
When To Use It
Common Mistakes
Do you know... ）がすでに疑問文なので、後半は肯定文でなければなりません。電池のように考えてください。プラス側は1つでいいのです。もう一つの典型的なミスは、 do, does, did を残してしまうことです。「Could you tell me where did he go?」は間違いです。「Could you tell me where he went?」とするべきです（動詞を過去形にするのを忘れないでください！）。また、 if も忘れないでください。「Do you know he is coming?」と聞くと、彼が来るという事実を私が知っているかどうかを尋ねることになります。「Do you know if he is coming?」と聞くと、答えそのものを尋ねることになります。小さな単語ですが、大きな意味を持ちます。最後に、導入部が質問でない場合は、クエスチョンマークを二重にしないでください。「I wonder where she is.」は句点（ピリオド）で終わり、クエスチョンマークではありません。そこでクエスチョンマークを使うと、文法の妖精が羽を失ってしまいます。Contrast With Similar Patterns
Reported Speech（間接話法）を見てみましょう。間接話法では、誰かが聞いたことを別の人に伝えます。「He asked me where I lived.」間接疑問文では、あなた自身が丁寧な形で聞いています。どちらも肯定文の語順を使うので似て見えますが、目的が異なります。次に Embedded Questions（埋め込み疑問文）があります。これらは非常に似ていますが、常に丁寧なお願いであるとは限りません。例えば、「I don't know what he wants.」は埋め込み疑問文です。これは自分の混乱についての事実を述べているだけです。間接疑問文は、特に情報を「得る」ために使われます。 Direct Questions（直接疑問文）と比較すると、間接疑問文はより長く、柔らかく、より「距離感」があります。直接疑問文が身体的なツッコミだとすれば、間接疑問文は部屋の向こう側から優しく手を振るようなものです。直接疑問文は親友との会話や、燃えている建物の中にいて「Where is the exit?!」と聞く必要があるときに使いましょう。それ以外は、間接で行きましょう。Quick FAQ
whether と if は同じですか？whether の方が少しだけフォーマルです。 if のタキシード版のようなものです。就職面接では whether を使い、ルームメイトにメールするときは if を使いましょう。Could you tell me...? には必要ですが、 I’d like to know... には不要です。Can you tell me... を使いましょう。Direct vs. Indirect Structure
| Question Type | Direct Question | Indirect Phrase | Embedded Clause (Correct Order) |
|---|---|---|---|
|
Wh- (Be verb)
|
Where is he?
|
Do you know...
|
...where he is?
|
|
Wh- (Action verb)
|
What does she want?
|
I wonder...
|
...what she wants.
|
|
Wh- (Past tense)
|
Why did they leave?
|
Can you tell me...
|
...why they left?
|
|
Yes/No (Be verb)
|
Is it raining?
|
I'm not sure...
|
...if it is raining.
|
|
Yes/No (Action)
|
Do they live here?
|
Do you know...
|
...if they live here?
|
|
Modal Verb
|
Can he swim?
|
I'd like to know...
|
...whether he can swim.
|
Common Introductory Phrases (Contractions)
| Full Form | Contraction | Usage |
|---|---|---|
|
I am not sure
|
I'm not sure
|
Neutral/Informal
|
|
I do not know
|
I don't know
|
Neutral/Informal
|
|
I would like to know
|
I'd like to know
|
Polite/Formal
|
|
I was wondering
|
I was wonderin' (slang)
|
Very Informal
|
Meanings
Indirect questions are questions tucked inside another sentence. They are used to be more polite, formal, or to express uncertainty without being blunt.
Polite Inquiry
Using an introductory phrase to ask for information less abruptly.
“Do you have any idea where the post office is?”
“I was wondering if you could help me.”
Reporting Questions
Describing a question that someone else asked or that you are thinking about.
“She asked me where I lived.”
“They wanted to know if the meeting was still on.”
Expressing Uncertainty
Using verbs like 'wonder' or 'don't know' to show a lack of information.
“I don't know why she left so early.”
“I'm not sure if we are allowed to park here.”
Reference Table
| 直接疑問文 | 導入フレーズ | 間接疑問文の後半部分 |
|---|---|---|
|
Where is it?
|
Do you know
|
where it is?
|
|
What time is it?
|
Could you tell me
|
what time it is?
|
|
Is she here?
|
I wonder
|
if she is here.
|
|
Can I help?
|
I was wondering
|
whether I could help.
|
|
When does it close?
|
Do you happen to know
|
when it closes?
|
|
Is he coming?
|
I'd like to ask
|
if he's coming.
|
フォーマル度スペクトル
Could you possibly direct me to the restroom? (Social interaction)
Do you know where the bathroom is? (Social interaction)
You know where the bathroom is? (Social interaction)
Where's the loo at? (Social interaction)
間接疑問文：丁寧さのナビゲーター
構造
- 丁寧なフレーズ `Do you know...?`, `Could you tell me...?`
- 倒置なし `Subject + Verb` (肯定文の語順)
- `if` / `whether` Yes/No疑問文用
いつ使うか
- フォーマルな場 面接、学術的な場
- 丁寧さが必要なとき 初対面、目上の人
- 控えめな依頼 お願い事、デリケートな質問
使わないとき
- カジュアルな会話 親友、家族
- 緊急時 緊急事態、素早い指示
- 皮肉のリスク 親しい仲で丁寧すぎるとき
よくある間違い
- 動詞の倒置 主語の前に動詞を置く
- `do/does`の残存 助動詞が消えていない
- `if/whether`の欠如 Yes/No疑問文で繋ぎがない
直接疑問文 vs 間接疑問文：トーンのチェック
間接疑問文を使うべき？
丁寧さやフォーマルさは重要ですか？
いいえ → 緊急、または非常にカジュアルな場面ですか？
いいえ → その質問は Yes/No で答えられますか？
最後に確認：埋め込まれた部分は「主語＋動詞」の順になっていますか？
よく使われる間接疑問文の始まり
一般的な丁寧さ
- • Do you know...
- • Could you tell me...
- • I wonder...
- • I'd like to ask...
よりフォーマル・控えめ
- • I was wondering...
- • Would you mind explaining...
- • Do you happen to know...
- • May I ask...
Yes/No疑問文用
- • if...
- • whether...
Wh-疑問文用
- • what...
- • where...
- • when...
- • why...
- • how...
レベル別の例文
Do you know where the toilet is?
Can you tell me what time it is?
I don't know who he is.
Do you know if she is here?
Could you tell me where the station is?
I wonder if it is cold outside.
Do you know what this word means?
I want to know why you are late.
I was wondering if you could help me with this bag.
Do you have any idea how much the tickets cost?
I'm not sure whether he likes coffee or tea.
Could you explain why the flight was cancelled?
I'd like to know what the requirements for this position are.
Would you mind telling me how you solved that problem?
It's important to understand why the market is fluctuating.
I was curious to see whether the experiment would work.
I was wondering if you might be able to provide some clarification on the new policy.
The committee is inquiring as to whether the funds have been allocated correctly.
One might ask how such a discrepancy could have gone unnoticed for so long.
I'd be interested to know what your take on the current political climate is.
It remains to be seen whether the proposed measures will suffice to mitigate the crisis.
I should like to ascertain why there has been such a marked decline in productivity.
The question of how we are to proceed in the face of such adversity is paramount.
Whether or not the protagonist truly achieves redemption is a matter of much scholarly debate.
間違えやすい
Learners often keep the 'Verb + Subject' order because they feel they are still asking a question.
Learners are used to using 'do/does/did' for all questions.
Learners don't know when to use which word for Yes/No indirect questions.
よくある間違い
Do you know where is the bus?
Do you know where the bus is?
Can you tell me what is your name?
Can you tell me what your name is?
I don't know who is he.
I don't know who he is.
Do you know if is it raining?
Do you know if it is raining?
Do you know what does he like?
Do you know what he likes?
I wonder where did they go.
I wonder where they went.
Can you tell me if has he a car?
Can you tell me if he has a car?
I was wondering if could you help me.
I was wondering if you could help me.
Do you know whether or not is the shop open?
Do you know whether or not the shop is open?
I'd like to know why didn't you call.
I'd like to know why you didn't call.
I inquired as to what was the reason for the delay.
I inquired as to what the reason for the delay was.
文型パターン
Do you know where ___ is?
I wonder if ___ will ___.
Could you tell me how ___ ___?
I was wondering whether ___ or ___.
Real World Usage
I was wondering if you could describe a typical day in this role.
Let me know if you're still coming tonight!
Do you know if this dish contains nuts?
I'd like to know when my order will arrive.
Excuse me, do you have any idea where the nearest ATM is?
This study explores how social media affects mental health.
イントネーションの流れを意識して
Could you tell me where it is?
二重疑問文は避けましょう
Do you know where is it?と言わないように注意してください。
Do you know where it is?
導入フレーズのバリエーションを増やす
Do you know...? ばかりではなく、 I wonder...? や Would you mind...? を使うとより自然です。状況に合わせて使い分けましょう。 I was wondering if you had a moment.
コンテキストがすべて
Could you clarify what the next steps are?
'If' と 'Whether' の使い分け
whether の方が少しフォーマルで、選択肢を提示する際によく好まれます。 "I'm not sure whether it will rain or not."Smart Tips
Stop! Move the 'is' to the very end of the sentence.
Always remember to bridge the two parts with 'if'.
Delete 'did' and make sure the main verb is in the past form.
Swap 'if' for 'whether' to sound more professional.
発音
Rising Intonation
If the introductory phrase is a question (e.g., 'Do you know...?'), your voice should rise at the end of the whole sentence.
Falling Intonation
If the introductory phrase is a statement (e.g., 'I wonder...'), your voice should fall at the end.
Polite Inquiry
Could you tell me... (pause) ...what time it is?
The pause after the intro phrase adds a level of politeness and gives the listener time to prepare.
暗記しよう
記憶術
Remember 'S-V' (Subject-Verb): In indirect questions, the Subject and Verb stay in their normal spots, just like a Statement.
視覚的連想
Imagine a small question box being placed inside a larger, polite gift box. Once it's inside the gift box, the question 'straightens up' into a normal statement to look nice for the recipient.
Rhyme
When 'Do you know' starts the play, the 'do' and 'does' must go away!
Story
A polite traveler named 'Subject' always walks before his dog 'Verb'. When they ask for directions directly, the dog jumps in front. But when they use a polite 'Could you tell me', the traveler regains control and walks in front of the dog again.
Word Web
チャレンジ
Go to a public place (or imagine one) and ask three people for information using 'Could you tell me...' followed by an indirect question. Focus on the word order at the end!
文化メモ
British speakers use indirect questions very frequently to avoid appearing 'pushy'. Using a direct question with a stranger can sometimes be perceived as slightly aggressive.
In US business settings, indirect questions are used to 'soften' feedback or requests to subordinates to maintain a collaborative atmosphere.
Asking about sensitive topics like salary, age, or religion almost always requires an indirect structure to be socially acceptable.
Indirect questions evolved from Old English 'interrogative sub-clauses'.
会話のきっかけ
Could you tell me what your favorite hobby is?
Do you know if there are any good restaurants nearby?
I was wondering what you think about the impact of AI on jobs.
I'd be interested to know whether you prefer working from home or in an office.
日記のテーマ
よくある間違い
Test Yourself
Do you know ___ she is from?
where が適切です。その後の語順が she is と肯定文の順になっているのもポイントです。Find and fix the mistake:
Could you tell me what time is the bank open?
is the bank ではなく the bank is という肯定文の語順にする必要があります。Choose the correct sentence:
if を使った間接疑問文でも、語順は「主語＋動詞」になります。 the bus will arrive が正しい形です。「あなたがこれを手伝ってくれるかどうか知りたいです」を英語にしましょう。
Answer starts with: ["I...
I'd like to know に、Yes/No疑問を繋ぐ if 、そして肯定文の語順を組み合わせています。Score: /4
練習問題
8 exercisesDirect: Where does she work?
I don't know what time ___ (the train / leave).
Find and fix the mistake:
Could you tell me where is the manager?
Did he pass the exam?
1. Why are you late? 2. Is he coming? 3. What do you want?
Asking about a meeting time.
I am writing to inquire ___ the position is still available.
Find and fix the mistake:
Do you have any idea how much does this cost?
Score: /8
Practice Bank
12 exercisesI don't know ___ the event starts at 7 or 8.
Could you tell me where did you buy that shirt?
正しい文を選んでください：
Translate into English: 'これがどうやって動くのか教えていただけますか？'
単語を並べ替えて文を作ってください：
文の始まりと終わりを正しく組み合わせてください：
I'd like to ask if he ___ (speak) English.
I was wondering if could you send me the report.
「一番近いATMはどこですか？」と聞くのに最も丁寧なのはどれ？
Translate into English: 'なぜ彼があんなに怒っているのか分かりません。'
単語を並べ替えてください：
適切な組み合わせを選んでください：
Score: /12
よくある質問 (8)
Only if the *introductory phrase* is a question (e.g., `Do you know...?`). If the intro is a statement (e.g., `I wonder...`), use a period.
They are often interchangeable, but `whether` is more formal and better when there are two clear alternatives (e.g., `whether to stay or go`).
Yes! If 'who' is the subject, the word order doesn't change much. Direct: `Who called?` -> Indirect: `Do you know who called?`.
Because those auxiliaries are only used to create the question word order (inversion). Since indirect questions use statement order, they aren't needed.
Yes, direct questions are normal with friends. Indirect questions are for being extra polite or expressing uncertainty.
Yes! For example: `What he said was very interesting.` Here, 'What he said' is an indirect question acting as the subject.
Keep the negative auxiliary but put it after the subject. Direct: `Why didn't he come?` -> Indirect: `I wonder why he didn't come.`
Common ones include `Could you tell me...`, `Do you know...`, `I was wondering...`, `I'd like to know...`, and `Would you mind telling me...`.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Preguntas indirectas (e.g., 'No sé dónde está')
English requires the removal of auxiliary 'do', which Spanish doesn't have.
Interrogation indirecte (e.g., 'Je me demande s'il vient')
French speakers might try to say 'Do you know what is it that...' (literal translation of est-ce que).
Indirekte Fragesätze
German puts the verb at the end; English keeps it after the subject.
〜か知っていますか (-ka shitte imasu ka)
Japanese uses particles; English uses word order and connectors like 'if'.
الأسئلة غير المباشرة
Arabic learners may struggle with the specific placement of the English 'be' verb.
间接疑问句 (Jiànjiē yíwènjù)
The main difficulty for Chinese speakers is the use of 'if/whether' and verb tense changes.
Learning Path
Prerequisites
関連動画
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