Chapter in 30 Seconds
Master the art of speculating about the past and predicting the future with confidence.
- Analyze past events using modal perfect structures.
- Express strong beliefs and logical deductions about reality.
- Utilize probability markers to sound like a native speaker.
배울 내용
과거에 일어났을 법한 일을 이야기할 때, 단순히 '했어'라고만 말하기엔 아쉬운 순간들이 있죠? 이번 챕터에서는 영어 실력을 한 단계 업그레이드해 줄 '추측과 제안의 기술'을 완벽하게 마스터해 볼 거예요. 먼저 'must have p.p.'로 확신에 찬 추측을 하거나, 'could have p.p.'로 과거에 놓친 기회에 대해 이야기하는 법을 배워요. 예를 들어 친구가 약속에 늦었을 때 '차가 막혔나 봐(must have been stuck)'라고 추측하거나, '미리 말해줄 수도 있었잖아(could have told me)'라며 아쉬움을 표현할 때 정말 유용하답니다. 또한 'would rather'로 선호도를 우아하게 표현하고, 'had better'나 'ought to'로 상황에 맞는 조언을 건네는 법도 다룰 거예요. 'bound to'나 'likely' 같은 표현으로 발생 확률을 섬세하게 조절하고, 'shall'을 활용한 격식 있는 표현까지 배우고 나면 여러분의 문장은 훨씬 풍성해질 거예요. 이 챕터를 마치고 나면 단순한 사실 전달을 넘어, 자신의 논리와 뉘앙스를 원어민처럼 정교하게 전달할 수 있게 됩니다. 자, 이제 더 깊이 있는 영어의 세계로 함께 들어가 볼까요?
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격식적인 미래 및 규칙 (Shall)'Shall'은 미래의 행동이나 규칙에 «격식», «의무», «단호한» 어조를 더해주는 멋진 표현이에요.
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영어 조동사: Had Better (조언 및 경고)급한 조언이나 경고를 할 때는 ‘had better’를 쓰는데, 항상 동사원형 바로 앞에 붙이고 'to'는 절대 사용하지 않는다는 점을 기억하세요.
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선호도 선택: Would Rather'Would rather'는 당신 자신이나 다른 사람의 행동에 대한 정확한 선호를 예의 바르게 표현할 때 사용하는 «마법의 표현»이에요.
precise preferences를politely말할 수 있게 도와줍니다. -
과거의 가능성: ~할 수 있었는데 (Could Have)과거에 일어날 '가능성'은 있었지만, 결국 하지 않거나 일어나지 않은 일에 대해 이야기할 때
could have를 사용해요. '과거 가능성', '후회', '하지 않은 일' 이 세 가지를 기억하면 좋아요! -
과거의 추측: Might Have (~했을지도 모른다)과거에 일어났을 가능성을 추측하는데, 완전히 확실하지 않을 때
might have를 사용해요. -
과거 추측: Must Have + V3명확한 증거를 바탕으로 과거 상황에 대해 확실하게 논리적인 추측을 할 때는
must have + V3를 사용해요. -
과거에 대한 강한 불신 (Can't Have + V3)과거에 어떤 일이 *정말로* 일어나지 않았다는 강한 결론을 내릴 때 'can't have + V3'를 사용해요. 핵심은 «강한 불신»과 «과거의 불가능»이죠.
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놓친 기회: 'Could have' 사용법 (미실현 가능성)'could have'를 잘 익히면 과거의 선택이나 실현되지 않은 가능성에 대해 명확하게 소통할 수 있어요. 이건 마치 과거의 «선택지»와 «아쉬움»을 표현하는 «마법의 열쇠» 같아요.
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Ought To: 조언 및 의무'Ought to'는 양심에 따른 조언을 할 때 사용해요. '옳은 일'이나 '기대되는 일'을 암시하죠. 마치 «양심적 조언», «강한 의무»처럼요.
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Speculation and Deduction: Must Be, Can't Be, Might Be (Present)Use must be, can't be, could be, and might be to make deductions about present situations. Must be = almost certain; can't be = impossible; might/could be = possible.
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Likely, Unlikely, Bound To, Certain To: Expressing ProbabilityBound to = almost certain to happen. Likely/unlikely = probable/improbable. Certain to = guaranteed. These adjectives follow be and precede infinitives.
Learning Objectives
By the end of this chapter, you will be able to:
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1
By the end you will be able to: describe past events that might have occurred using perfect modals.
챕터 가이드
Overview
shall for formal future plans or polite offers, how had better gives urgent advice, and why would rather is perfect for stating preferences. We'll also explore ought to for moral obligations.How This Grammar Works
I could have gone to the party, but I was too tired.This shows a missed chance or an unrealized possibility.
The ground is wet. It must have rained last night.Conversely, to express strong past disbelief – a near 99% certainty that something *didn't* happen – use can't have + past participle.
Guests shall not smoke indoors), or for polite offers/suggestions (typically British English):
Shall I open the window for you?. For urgent advice where ignoring it leads to negative consequences, use had better: "You had better leave now, or you'll miss your flight.
To state a preference in a specific situation, would rather + base verb is perfect:I would rather stay home tonight than go out.
Finally, ought to + base verb conveys moral advice or logical expectation, offering a slightly stronger or more meaningful alternative to should: You ought to apologize; what you said was hurtful."
Common Mistakes
- 1✗ I must went home early.
must, might, could, can't are followed by have + the past participle (V3) form of the main verb, not the base form.- 1✗ He didn't arrive; he might not have seen my message.
might not have expresses a possibility of something *not* happening, couldn't have implies stronger impossibility or unlikelihood (similar to can't have but often used for a specific past inability). Be clear about your degree of certainty.- 1✗ I had better to study for the exam.
Had better is followed directly by the base form of the verb, without to.
Real Conversations
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B
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We could have gone to that concert, but tickets sold out. I would rather watch a movie at home than just sit around doing nothing.
A
Good idea. What movie shall we watch?
Quick FAQ
What's the difference between might have and must have when guessing the past?
Might have indicates a possibility, meaning you're unsure (e.g.,
She *might have* left her keys).
Must have indicates strong certainty based on evidence (e.g., The lights are on, so she *must have* arrived).
Can could have be used for both possibility and missed chances?
Yes.
I *could have* won the lottery(missed chance/unrealized possibility) and
He *could have* been sick yesterday(past possibility/speculation) are both correct uses.
Is "can't have" always about impossibility?
Yes, "can't have" + past participle expresses a very high degree of certainty that something *did not* or *could not have* happened. It's a strong rejection of a past possibility.
When should I use ought to instead of should?
Ought to often carries a slightly stronger sense of moral obligation, logical expectation, or what is 'right', compared to the more general advice of should. While often interchangeable, ought to can feel a bit more formal or weighty.
Cultural Context
Shall is notably more common in British English for polite offers (Shall I get it?) and formal/legal contexts, while less frequently used in everyday American English, where
will or should I are preferred. Had better is universally understood but can sound a little direct or even like a veiled threat if not used carefully, especially in informal settings.must have, might have, could have, and can't have are quite consistent across all major English dialects, serving as reliable tools for discussing past events with varying degrees of certainty. Mastering these nuances will make your communication sound much more natural.주요 예문 (8)
The company `shall` provide health benefits to all employees.
회사는 모든 직원에게 건강 보험 혜택을 제공해야 한다.
격식적인 미래 및 규칙 (Shall)You'd better submit that assignment by midnight, or you'll lose points.
자정까지 과제를 제출하는 게 좋을 거야, 안 그러면 점수를 잃게 될 거야.
영어 조동사: Had Better (조언 및 경고)We had better not forget to buy milk on the way home.
집에 가는 길에 우유 사는 것을 잊지 않는 게 좋겠어.
영어 조동사: Had Better (조언 및 경고)I'd rather have a quiet night in than go to a crowded party.
복잡한 파티에 가는 것보다 조용한 저녁을 집에서 보내는 게 더 나아요.
선호도 선택: Would RatherWould you rather study now or take a break and study later?
지금 공부할래요, 아니면 좀 쉬다가 나중에 공부할래요?
선호도 선택: Would RatherI could have stayed in bed all day, but I decided to go to the gym.
하루 종일 침대에 누워 있을 수도 있었지만, 헬스장에 가기로 했어요.
과거의 가능성: ~할 수 있었는데 (Could Have)You could have liked my photo on Instagram, it took me an hour to edit!
내 인스타그램 사진에 '좋아요' 눌러줄 수도 있었잖아, 그거 보정하는 데 한 시간 걸렸단 말이야!
과거의 가능성: ~할 수 있었는데 (Could Have)팁과 요령 (4)
'Will'을 기본으로 사용하기
축약형을 자주 활용해보세요!
줄임말은 당신의 친구!
I'd rather, She'd rather, They'd rather. It makes you sound super natural and fluent."'Could Of' 함정 조심!
I could have done it.
핵심 어휘 (5)
Real-World Preview
The Mystery Meeting
Review Summary
- Must have + V3
자주 하는 실수
People often confuse 'have' with the sound of 'of' in contractions.
Modals are followed by the base form 'have', never 'has'.
Again, use 'have' after modal perfects regardless of the subject.
이 챕터의 규칙 (11)
Next Steps
You have mastered complex past speculation! Take a moment to celebrate this achievement.
Write a 5-sentence mystery story using 3 modal perfects.
빠른 연습 (10)
You ___ tell your parents about your plans.
frontend.learn_grammar.from_rule: Ought To: 조언 및 의무
Choose the correct sentence:
could have 뒤에 동사의 과거분사(V3)가 오는 것입니다. 'won'은 'win'의 V3입니다.frontend.learn_grammar.from_rule: 놓친 기회: 'Could have' 사용법 (미실현 가능성)
I ___ have bought that laptop, but I saved my money instead.
frontend.learn_grammar.from_rule: 과거의 가능성: ~할 수 있었는데 (Could Have)
Find and fix the mistake:
They must of finished the meeting by now.
frontend.learn_grammar.from_rule: 과거 추측: Must Have + V3
Which is correct?
frontend.learn_grammar.from_rule: Likely, Unlikely, Bound To, Certain To: Expressing Probability
All employees ___ adhere to the new safety regulations.
frontend.learn_grammar.from_rule: 격식적인 미래 및 규칙 (Shall)
Find and fix the mistake:
They could have went to the concert last night.
frontend.learn_grammar.from_rule: 과거의 가능성: ~할 수 있었는데 (Could Have)
He ___ be at home; his car is in the driveway.
frontend.learn_grammar.from_rule: Speculation and Deduction: Must Be, Can't Be, Might Be (Present)
I'd rather ___ a book than watch TV.
frontend.learn_grammar.from_rule: 선호도 선택: Would Rather
Choose the correct sentence:
frontend.learn_grammar.from_rule: 격식적인 미래 및 규칙 (Shall)
Score: /10
자주 묻는 질문 (6)
Shall I start?)에서 여전히 활발하게 사용되고 있어요.Had better는 어떤 일을 하는 것이 아주 바람직하거나 권장된다는 의미이며, 종종 그 행동을 하지 않으면 부정적인 결과가 있을 수 있다는 경고를 내포하고 있어요. 'should'보다 더 강한 표현이라고 생각하면 돼요. 예를 들어: "You'd better study hard."had better는 *항상* 현재나 미래의 일을 나타내요. 지금 또는 곧 일어날 행동에 대한 조언이나 경고에 사용되며, 과거의 일에는 사용하지 않아요. 예를 들어: "We'd better leave now."
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