Grammar Rule in 30 Seconds
Use this to explain how a different choice in the past would change your life or situation right now.
- Use 'If + Past Perfect' for the past hypothetical part: 'If I had studied...'
- Use 'would + base verb' for the present result: '...I would be a doctor now.'
- Do NOT use 'would' in the 'If' clause; keep it in the result clause only.
Overview
- 1条件節（If節）：過去の事実に反する仮定
had + 過去分詞）」を使用します。- 1帰結節（主節）：現在の事実に反する結果
would + 動詞の原形）」を使用します。If I studied... と過去形だけで済ませてしまうミスを犯しがちです。しかし、英語では「過去の事実に反すること」を明確にするために、一段階古い時制である「過去完了形」を使うという厳格なルールがあります。If + 主語 + had + 過去分詞, 主語 + would/could/might + 動詞の原形.had + 過去分詞 を使います。If I had taken that job...（もしあの仕事を引き受けていたら……実際は断ったが）If we hadn't missed the train...（もし電車に乗り遅れていなかったら……実際は乗り遅れたが）
would, could, might）に動詞の原形を続けます。...I would be living in London now.（……今ごろロンドンに住んでいるだろうに）...we would be at the meeting already.（……今ごろはもう会議に出ているはずなのに）
would: 「〜だろうに」という強い推量や確信。最も一般的です。could: 「〜できるだろうに」という能力や可能性。過去の選択が現在の「能力」を変えていた可能性を示唆します。might: 「〜かもしれないのに」という控えめな推量。確信が持てない場合に使います。
- 肯定の条件 + 否定の結果:
If I had moved to Tokyo last year, I wouldn't be so lonely now.（去年東京に引っ越していたら、今こんなに寂しくはないだろうに） - 否定の条件 + 肯定の結果:
If he hadn't lost his passport, he would be on the plane right now.（彼がパスポートを失くしていなければ、今ごろ飛行機に乗っているはずなのに）
now, today, at the moment などの現在を表す副詞を置くと、現在の結果であることを強調でき、聞き手にとっても分かりやすくなります。- 「昨夜、あんなに飲まなければ、今ごろ二日酔いで苦しんでいないのに。」
If I hadn't drunk so much last night, I wouldn't be suffering from a hangover now.- 「大学で中国語を専攻していたら、今の出張でもっと役に立てるのに。」
If I had majored in Chinese in college, I would be more helpful on this business trip.- 「あの時、彼らが我々の提案を受け入れていなかったら、今の我々の成功はないだろう。」
If they hadn't accepted our proposal back then, we wouldn't be successful today.- （道に迷っている状況で）「地図をちゃんと確認しておけば、今こんなところで迷ってないよ。」
We wouldn't be lost if we had checked the map properly.- 「もっと早く寝ていれば、今そんなに眠くないはずだよ。」
You wouldn't be so sleepy now if you had gone to bed earlier.If we had invested in this technology earlier, we would be the market leader now.（もっと早くこの技術に投資していれば、今ごろ市場のリーダーになっていただろう）のように、戦略的な視点を示す際にも多用されます。would を入れてしまうwould を使いたくなりますが、If の中に would は入りません。- ❌ Mistake:
If I would have studied harder, I would be a doctor. - ✅ Correct:
If I had studied harder, I would be a doctor. - Why?:
wouldは「結果」を表す助動詞です。条件（If）はすでに確定した過去の事実をひっくり返すだけなので、時制を一つ戻すhad + 過去分詞だけで十分なのです。
- ❌ Mistake:
If I bought the ticket yesterday, I would be at the concert now. - ✅ Correct:
If I had bought the ticket yesterday, I would be at the concert now. - Why?:
If I boughtと言うと、英語では「（今から）もし買ったら」という現在の仮定（Second Conditional）に聞こえてしまいます。昨日の話であることを示すには、必ずhad boughtと過去完了形にする必要があります。
- ❌ Mistake:
If I had studied, I would have been smart now. - ✅ Correct:
If I had studied, I would be smart now. - Why?:
would have beenは「過去のある時点で〜だっただろう」という意味になります。文末にnowがある場合は、現在の状態を表すwould beを使うのが正解です。
If + 過去形, would + 原形 | 現在の事実に反する仮定 → 現在の結果 | If I were rich, I would buy a car. (今金持ちなら、今車を買うのに) |If + 過去完了, would have + P.P. | 過去の事実に反する仮定 → 過去の結果 | If I had studied, I would have passed. (あの時勉強してたら、あの時受かったのに) |If + 過去完了, would + 原形 | 過去の事実に反する仮定 → 現在の結果 | If I had studied, I would be a lawyer now. (あの時勉強してたら、今ごろ弁護士なのに) |If 節を後ろに持ってくることはできますか？I would be a manager now if I had stayed at my previous company. 意味は全く同じですが、英語では重要な情報（この場合は「今の状態」）を先に言う傾向があるため、主節を先に持ってくる形も非常によく使われます。If I had... を Had I... と倒置してもいいですか？Had I known about the issue earlier, I would be able to fix it now.（もしその問題を早く知っていたら、今すぐ直せるのですが）のように、If を省略して Had を文頭に出す倒置形は、フォーマルなレポートやスピーチで好まれます。would be の代わりに would have been を使う混合仮定法もあると聞きましたが？If I weren't so shy (現在の性格), I would have asked her out yesterday (過去の行動).（私がこんなにシャイでなければ、昨日彼女を誘っていたのに）。今回学習した「過去→現在」のパターンとは逆の「現在→過去」のパターンですが、まずは今回の「過去のミス→現在の結果」の形をマスターするのが上達の近道です。now などの言葉がなくても混合仮定法だとわかりますか？now, today, currently, at present などの言葉を添えるのが安全です。これにより、聞き手は「あ、過去の話から今の話にシフトしたんだな」と明確に理解できます。Structure of Mixed Conditionals (Past -> Present)
| Clause Type | Tense/Form | Example Component |
|---|---|---|
|
If-Clause (Condition)
|
Past Perfect
|
If I had (not) + Past Participle
|
|
Main Clause (Result)
|
Present Conditional
|
Subject + would (not) + Base Verb
|
|
Affirmative
|
Had + V3 / Would + V1
|
If I had won, I would be rich.
|
|
Negative
|
Hadn't + V3 / Wouldn't + V1
|
If I hadn't lost, I wouldn't be poor.
|
|
Question
|
Would... if + Had + V3?
|
Would you be rich if you had won?
|
Contractions in Mixed Conditionals
| Full Form | Contraction | Example |
|---|---|---|
|
I had not
|
I hadn't
|
If I hadn't gone...
|
|
I would not
|
I wouldn't
|
...I wouldn't be here.
|
|
He had
|
He'd
|
If he'd known...
|
|
They would
|
They'd
|
...they'd be happy.
|
Meanings
A mixed conditional sentence that describes a hypothetical past action and its hypothetical present consequence. It is used when the condition is in the past but the result is in the present.
Regret and Reflection
Expressing regret about a past decision that affects current happiness or status.
“If I hadn't dropped out of college, I would have a better salary now.”
“If we had moved to Spain last year, we would be speaking fluent Spanish by now.”
Logical Consequence
Stating a logical present outcome of a past event that didn't happen.
“If the team had won the match, they would be in the finals today.”
“If I had remembered to charge my phone, I wouldn't be lost right now.”
Personality and Traits
How a past event would have changed someone's current character or state of being.
“If he had grown up in the city, he wouldn't be so afraid of crowds.”
“If I had been born in the 1950s, I would be a very different person.”
Reference Table
| 条件文の種類 | If節 (条件) | 主節 (結果) | 時間軸 |
|---|---|---|---|
|
Mixed (Type 3 -> 2)
|
If + Past Perfect (had + V3)
|
would/could/might + base verb (V1)
|
過去の行動、現在の結果
|
|
Example
|
If I had studied harder (past)
|
I would be more confident now (present)
|
後悔している過去、影響を受けている現在
|
|
Negative Example
|
If she hadn't helped me (past)
|
I wouldn't be finished yet (present)
|
過去の行動が回避された、現在の状態
|
|
Usage
|
仮定の過去のシナリオ
|
現在の結果
|
「なぜ今こうなのか」を説明
|
|
Contrast (Third Conditional)
|
If + Past Perfect (had + V3)
|
would/could/might + have + V3
|
過去の行動、過去の結果
|
|
Contrast Example
|
If I had studied harder (past)
|
I would have passed the exam (past)
|
過去の後悔と過去の結果
|
フォーマル度スペクトル
Had we purchased the property in 2015, we would be in a significantly better financial position today. (Financial discussion)
If we had bought the house back then, we would be rich now. (Financial discussion)
If we'd grabbed that house, we'd be set for life. (Financial discussion)
If I'd copped that crib, I'd be ballin' right now. (Financial discussion)
複合仮定法 (過去の行動、現在の結果)
If節 (過去の条件)
- If + 過去完了形 If I had saved...
- 仮定の過去 What didn't happen in the past
主節 (現在の結果)
- Would/Could/Might + 動詞の原形 ...I would be...
- 現在の結果 How things are now
主要な考え方
- タイムトラベル Past affects Present
- 後悔/説明 Why my present is this way
複合仮定法 vs 第三条件文
複合仮定法ですか？ (過去の行動、現在の結果)
if節は、仮定の、または後悔している過去の行動についてですか？
主節は「今」真実である結果や状態を表していますか？
複合仮定法を使う時
後悔と非難
- • If I hadn't procrastinated...
- • If she had warned me...
- • Wouldn't be in this mess
説明と正当化
- • If I had pursued that degree...
- • Wouldn't have this job
- • Explaining current career
逃した機会
- • If we had invested then...
- • Would be rich now
- • Lamenting financial choices
現在の能力
- • If I had practiced more...
- • Could play guitar well
- • Relating past effort to current skill
レベル別の例文
If I had water, I would not be thirsty.
If I had water, I would not be thirsty.
If I had my keys, I would be inside.
If I had my keys, I would be inside.
If I had a map, I would know the way.
If I had a map, I would know the way.
If I had money, I would be happy.
If I had money, I would be happy.
If I had studied, I would be a doctor.
If I had studied, I would be a doctor.
If we had left early, we would be there now.
If we had left early, we would be there now.
If she had called me, I wouldn't be sad.
If she had called me, I wouldn't be sad.
If they had helped, the work would be finished.
If they had helped, the work would be finished.
If I hadn't lost my passport, I would be in Paris right now.
If I hadn't lost my passport, I would be in Paris right now.
If he had taken the job, he would be living in New York.
If he had taken the job, he would be living in New York.
If we had bought that house, we would be rich today.
If we had bought that house, we would be rich today.
If I had listened to you, I wouldn't be in this mess.
If I had listened to you, I wouldn't be in this mess.
If the company had invested in tech earlier, they would be the market leaders now.
If the company had invested in tech earlier, they would be the market leaders now.
If I hadn't broken my leg, I would be playing in the final today.
If I hadn't broken my leg, I would be playing in the final today.
If you had told me you were coming, the house would be clean.
If you had told me you were coming, the house would be clean.
If she had practiced more, she would be a famous pianist by now.
If she had practiced more, she would be a famous pianist by now.
Had the negotiators been more flexible, we would not be facing a strike today.
Had the negotiators been more flexible, we would not be facing a strike today.
If I hadn't been born into a wealthy family, I wouldn't have such a skewed perspective on poverty.
If I hadn't been born into a wealthy family, I wouldn't have such a skewed perspective on poverty.
If the architect hadn't ignored the safety codes, the building would still be standing.
If the architect hadn't ignored the safety codes, the building would still be standing.
If I had pursued my interest in biology, I might be working in a lab right now.
If I had pursued my interest in biology, I might be working in a lab right now.
Were it not for the fact that I had already committed to the project, I would be joining you on your travels.
Were it not for the fact that I had already committed to the project, I would be joining you on your travels.
Had the Enlightenment never occurred, our modern concept of individual rights would be non-existent.
Had the Enlightenment never occurred, our modern concept of individual rights would be non-existent.
If the virus had mutated differently last year, we would still be living under strict lockdown measures.
If the virus had mutated differently last year, we would still be living under strict lockdown measures.
If I hadn't squandered my inheritance in my twenties, I would be comfortably retired by now.
If I hadn't squandered my inheritance in my twenties, I would be comfortably retired by now.
間違えやすい
Both start with 'If I had...', but the Third Conditional ends with 'would have + V3'.
Both use 'would + base' in the result clause.
よくある間違い
If I study, I am happy now.
If I had studied, I would be happy now.
If I would have gone, I am there.
If I had gone, I would be there.
If I had known, I would have been here now.
If I had known, I would be here now.
If I hadn't been born in France, I wouldn't speak French.
If I hadn't been born in France, I wouldn't be speaking French (right now).
文型パターン
If I had ___ (V3), I would be ___ (adjective) now.
If ___ (subject) hadn't ___ (V3), we wouldn't be ___ (V-ing) right now.
Real World Usage
If I hadn't managed that project last year, I wouldn't be ready for this role.
If I'd seen your text earlier, I'd be there by now!
If I had finished the antibiotics, would I still be feeling sick?
If you had started saving at 20, you would be a millionaire now.
If the striker hadn't missed that penalty, they would be champions today.
If I hadn't clicked that link, my computer wouldn't be broken lol.
時間軸のジャンプを見つけよう
If節に'would'はNG！
If I had known that, I would be acting differently now.
今どきの後悔にぴったり
'Had'の短縮形を使いこなそう
結果が「今」のことか確認しよう
If I had studied harder, I would be more confident now.
Smart Tips
Check if the regret is about a past action or a current state. If you are currently feeling the consequence, use 'would + base'.
This is a huge hint! If the sentence ends in 'now', the result clause almost always needs to be 'would + base'.
Use 'Had I' instead of 'If I had'. It removes the 'if' and sounds very sophisticated.
Remember: 'Had' is for the past (the cause), 'Would' is for the present (the dream).
発音
The 'd' contraction
In spoken English, 'had' and 'would' both contract to ''d'. You must use context to know which is which.
Stress on 'Hadn't'
When expressing regret, the word 'hadn't' is often heavily stressed to emphasize the counterfactual nature.
The Conditional Rise-Fall
If I had studied (rise), I would be a doctor (fall).
The rise indicates the condition, the fall indicates the result.
暗記しよう
記憶術
Past Perfect for the Past, Would for the Now.
視覚的連想
Imagine a bridge. One side is a 'No Entry' sign in 2010 (the past event that didn't happen). The bridge leads directly to a different version of your house today. The bridge is the 'Mixed Conditional'.
Rhyme
If 'had' was in the past you see, then 'would' is where you'd like to be.
Story
John didn't buy Bitcoin in 2010 (Past). Now he is poor (Present). John says: 'If I had bought Bitcoin, I would be a millionaire.' The story connects his past mistake to his empty wallet today.
Word Web
チャレンジ
Write three sentences about how your life would be different today if you had chosen a different university or job.
文化メモ
British speakers often use 'should' instead of 'would' in the first person, though this is becoming rare and very formal.
Americans are very likely to use 'would have' in the 'if' clause in casual speech, even though it is grammatically incorrect.
In formal academic contexts, the 'Had I...' inversion is preferred over 'If I had...' to sound more authoritative.
Conditionals in English evolved from Old English 'gif' (if) and the use of the subjunctive mood to express unreality.
会話のきっかけ
If you had been born in a different country, how would your life be different now?
If you hadn't started learning English, what would you be doing with your free time today?
If you had won the lottery five years ago, where would you be living right now?
日記のテーマ
よくある間違い
Test Yourself
If I ___ (not/eat) that whole pizza, I ___ (not/feel) sick now.
Find and fix the mistake:
If she would have checked the schedule, she wouldn't be late now.
もし彼がもっと早く出発していたら、彼は今頃渋滞にはまっていないだろう。
Answer starts with: ["I...
Choose the correct sentence:
Score: /4
練習問題
8 exercisesIf I ___ (not/waste) all my money on that car last year, I ___ (be) able to afford this trip now.
Which sentence is correct?
Find and fix the mistake:
If she had took the map, she wouldn't be lost now.
I didn't study medicine. I am not a doctor today.
1. If I hadn't eaten so much... 2. If I had moved to London... 3. If I hadn't lost my phone...
In a mixed conditional (past/present), you can use 'would' in both parts of the sentence.
A: Why are you so tired? B: If I ___ (go) to bed earlier last night, I ___ (not/be) so exhausted now.
If I had seen him, I would have said hello.
Score: /8
Practice Bank
11 exercisesIf I ___ (not/forget) my wallet, I ___ (can/buy) coffee now.
If we would have listened to the warning, we wouldn't be lost in the woods.
Which sentence is correct?
もし彼らがその提案を受け入れていたら、彼らは今もっと成功しているだろう。
これらの単語を並べ替えて文を作りましょう:
節を組み合わせましょう:
If you ___ (listen) to my advice, you ___ (not/have) this problem now.
If I'd took that job, I'd be living in a different city now.
Choose the correct sentence:
もし彼がアドバイスを受けていたら、彼は今こんなに困っていないだろう。
これらの単語を並べ替えて文を作りましょう:
Score: /11
よくある質問 (8)
Yes! 'Could' adds the meaning of 'ability'. For example: 'If I had finished my work, I could be at the party now' means I would have the ability/permission to be there.
Absolutely. 'I would be rich if I had invested in Apple.' Just remember to remove the comma when the 'if' is in the middle.
The Third Conditional is Past/Past (If I had studied, I would have passed). The Mixed Conditional is Past/Present (If I had studied, I would be a doctor now).
This is very common in casual American English, but it is considered incorrect in exams and formal writing. Always use 'If I had...' for your tests!
Yes, 'might' is used if the present result is only a possibility. 'If I had taken that job, I might be happy now' (but I'm not sure).
It is neutral. It's used in both casual conversation and formal reports. However, the 'Had I...' inversion is very formal.
Only if the 'If' clause comes first. If the 'would' clause comes first, no comma is needed.
Technically, yes. 'If I had bought the tickets yesterday, I would be going to the concert tomorrow.' This is also a type of mixed conditional.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Si hubiera [participio], [condicional]
Spanish uses a specific subjunctive form, whereas English uses the indicative 'had'.
Wenn ich ... hätte, wäre ich ...
German word order (verb at the end) is the main struggle for learners.
Si j'avais [participe], je serais...
French does not use the subjunctive here, similar to English.
~te itara, ~noni
Japanese doesn't have a strict 'Past Perfect' vs 'Past Simple' distinction in the same way English does.
Law kuntu... lakuntu...
The verb 'to be' (kana) is repeated in both clauses to show the hypothetical nature.
Ruguo... jiu...
Context and time words (like 'now' or 'yesterday') are the only way to tell it's a mixed conditional.
Learning Path
Prerequisites
Learn These First
関連動画
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