Grammar Rule in 30 Seconds
Use 'Modal + have + been + Past Participle' to discuss past events where the focus is on the receiver, not the doer.
- Use 'should have been' for past regrets or missed opportunities (e.g., 'It should have been fixed').
- Use 'must have been' for strong logical deductions about the past (e.g., 'The window must have been broken').
- Use 'could have been' for past possibilities that didn't happen (e.g., 'The game could have been won').
Overview
must have been done, should have been done, could have been done과 같은 형태를 말합니다.should have been corrected 역시 이와 유사한 적층 구조를 가집니다.- Modal:
should(마땅히 그랬어야 한다는 화자의 판단) - Perfect Aspect:
have been(과거의 특정 시점을 가리킴) - Passive Voice:
been corrected(주어가 수정을 하는 것이 아니라 수정되는 대상임을 나타냄)
have의 형태입니다. 조동사 뒤에 오기 때문에 주어의 인칭이나 수에 상관없이 항상 원형인 have를 유지합니다. 또한, 수동태를 만들기 위해 be 동사의 과거분사 형태인 been이 반드시 들어가야 합니다. 한국어 화자들이 가장 자주 실수하는 부분이 바로 이 been을 빼먹는 것인데, been이 빠지면 문장은 능동태가 되어 전혀 다른(때로는 우스꽝스러운) 의미가 되어버립니다.The safe must have been locked. (금고가 잠겨 있었음에 틀림없다.) |The error should have been caught earlier. (그 실수는 더 일찍 발견되었어야 했다.) |The accident could have been prevented. (그 사고는 예방될 수도 있었다.) |The package might have been delivered to the wrong house. (택배가 다른 집으로 배달되었을지도 모른다.) |The window can't have been broken from the inside. (창문이 안에서 깨졌을 리가 없다.) |not을 붙입니다. 줄임말인 shouldn't, couldn't 등이 빈번하게 사용됩니다.The files should not have been deleted.(그 파일들은 삭제되지 말았어야 했다.)The secret might not have been revealed yet.(그 비밀은 아직 밝혀지지 않았을지도 모른다.)
must have been)This table must have been reserved in advance.
should have been)The report should have been proofread more carefully before submission.
could have been)Someone could have been injured by the falling tent.
would have been)If the update had been installed, the system would not have been hacked.(업데이트가 설치되었더라면, 시스템은 해킹당하지 않았을 것이다.)
been을 생략하는 실수 (능동 vs 수동 혼동)- Incorrect:
The project should have finished last week. - Correct:
The project should have been finished last week. - Why? 프로젝트는 스스로를 끝낼 수 없습니다. 누군가에 의해 '끝내지는' 것이므로 반드시
been이 필요합니다.
must와 should의 뉘앙스 혼동The food must have been delivered.(배달 앱을 보니 배달 완료라고 떠서 하는 확신: «배달됐음이 틀림없어.»)The food should have been delivered.(배달 예정 시간이 지났는데 안 와서 하는 불평: «배달됐어야 했는데(왜 안 오지?).»)
has 사용 오류He, She, It, The report)일 때 습관적으로 has를 쓰고 싶은 유혹을 느낍니다.- Incorrect:
The car must has been stolen. - Correct:
The car must have been stolen. - Why? 조동사(
must,should,could등) 뒤에는 반드시 동사 원형(have)이 와야 합니다.
You should have sent the email. |The email should have been sent. |The email was sent yesterday. |The email was sent는 단순히 이메일이 발송되었다는 '사실'만을 말합니다. 반면 The email should have been sent는 발송되었어야 했는데 안 되었거나, 발송 시점에 대한 화자의 '강한 유감이나 비판'이 담겨 있습니다. C1 레벨에서는 단순히 사실을 나열하는 것을 넘어, 이러한 화자의 태도(Stance)를 문법 구조에 녹여내는 것이 핵심입니다.can have been done이라는 표현도 쓰나요?can 대신 could, may, might를 사용합니다. can't have been done처럼 부정문에서 '강한 부정적 추측'을 나타낼 때만 can 계열이 완료 수동태와 결합합니다.You should have told me라고 하면 공격적으로 들릴 수 있지만,
I should have been told라고 하면 «내가 전달받았어야 하는 건데(누구 탓인지 모르겠지만)»라는 뉘앙스가 되어 부드러워집니다.
ought to have been done은 무엇인가요?ought to는 should와 거의 같은 의미입니다. The document ought to have been signed라고 하면 should have been signed와 의미상 차이가 거의 없으나, 조금 더 도덕적 의무나 강한 당위성을 강조하는 고전적인 느낌을 줍니다. 현대 영어에서는 should를 훨씬 더 많이 사용합니다.이 공지는 어제 공유되었어야 했어(should have been shared)!라고 혼잣말을 해보는 것만으로도 구조가 입에 붙기 시작할 것입니다. 여러분의 유창함(Fluency)은 이런 작은 디테일에서 완성됩니다. 쉽죠? 계속 연습해 보세요!
Passive Perfect Modal Structure
| Subject | Modal | Perfect Auxiliary | Passive Marker | Past Participle |
|---|---|---|---|---|
|
The car
|
must
|
have
|
been
|
stolen
|
|
The letters
|
should
|
have
|
been
|
sent
|
|
The problem
|
could
|
have
|
been
|
solved
|
|
The law
|
might
|
have
|
been
|
changed
|
|
The truth
|
may
|
have
|
been
|
hidden
|
|
The work
|
ought to
|
have
|
been
|
done
|
Common Contractions
| Full Form | Contraction | Pronunciation Note |
|---|---|---|
|
should have been
|
should've been
|
Sounds like 'should-uv-bin'
|
|
could have been
|
could've been
|
Sounds like 'could-uv-bin'
|
|
must have been
|
must've been
|
Sounds like 'must-uv-bin'
|
|
might have been
|
might've been
|
Sounds like 'might-uv-bin'
|
Meanings
A grammatical structure used to express degrees of certainty, obligation, or regret about past actions while maintaining a passive focus on the object of the action.
Logical Deduction
Expressing a strong belief that something happened based on evidence.
“The safe must have been opened with a key.”
“The lights were on, so the house must have been cleaned already.”
Unfulfilled Obligation/Regret
Expressing that an action was desirable or necessary but did not occur.
“The report should have been submitted yesterday.”
“The guests ought to have been informed of the delay.”
Past Possibility
Discussing things that were possible in the past but did not happen, or whose occurrence is uncertain.
“The package could have been lost in the mail.”
“The building might have been saved if the fire department arrived sooner.”
Reference Table
| Form | Structure | Example |
|---|---|---|
|
Affirmative
|
Modal + have + been + V3
|
It must have been done.
|
|
Negative
|
Modal + not + have + been + V3
|
It shouldn't have been done.
|
|
Question
|
Modal + Subj + have + been + V3?
|
Could it have been done?
|
|
Possibility
|
Might/May + have + been + V3
|
It might have been lost.
|
|
Regret
|
Should + have + been + V3
|
It should have been fixed.
|
|
Deduction
|
Must + have + been + V3
|
It must have been stolen.
|
격식 수준 스펙트럼
The error should have been circumvented through more rigorous oversight. (Discussing a failure.)
The mistake should have been avoided. (Discussing a failure.)
That shouldn't have happened. (Discussing a failure.)
That was a total fail, shouldn've been like that. (Discussing a failure.)
Functions of Passive Perfect Modals
Deduction
- Must have been Strong certainty
Regret
- Should have been Missed obligation
Possibility
- Could have been Past potential
Active vs. Passive Perfect Modals
Choosing the Right Modal
Are you sure it happened?
Was it a mistake or regret?
Usage Contexts
Legal
- • Evidence must have been planted
- • Rights should have been read
Business
- • Emails should have been sent
- • Budget could have been saved
수준별 예문
The door must have been locked.
La puerta debe haber estado cerrada.
The food must have been good.
La comida debe haber estado buena.
It must have been cold.
Debió haber hecho frío.
The car must have been red.
El coche debe haber sido rojo.
The homework should have been done.
La tarea debería haber sido hecha.
The window could have been broken.
La ventana podría haber sido rota.
The lights should have been turned off.
Las luces deberían haber sido apagadas.
The cat must have been fed.
El gato debe haber sido alimentado.
The meeting might have been cancelled.
La reunión podría haber sido cancelada.
The project should have been finished by now.
El proyecto debería haber sido terminado ya.
The keys must have been left in the car.
Las llaves deben haber sido dejadas en el coche.
The cake couldn't have been eaten by the dog.
El pastel no pudo haber sido comido por el perro.
The documents ought to have been filed correctly.
Los documentos deberían haber sido archivados correctamente.
The suspect must have been seen by someone.
El sospechoso debe haber sido visto por alguien.
The error should never have been allowed to happen.
El error nunca debería haber sido permitido que ocurriera.
The city could have been destroyed by the storm.
La ciudad podría haber sido destruida por la tormenta.
The implications of the policy must have been overlooked.
Las implicaciones de la política deben haber sido pasadas por alto.
The manuscript might have been written by a different author.
El manuscrito podría haber sido escrito por un autor diferente.
The funds should have been allocated to education instead.
Los fondos deberían haber sido asignados a la educación en su lugar.
The witness may have been intimidated into silence.
El testigo puede haber sido intimidado para guardar silencio.
Had the warnings been heeded, the tragedy might have been averted.
Si se hubieran escuchado las advertencias, la tragedia podría haberse evitado.
The nuances of the text could not have been fully grasped without context.
Los matices del texto no podrían haber sido captados completamente sin contexto.
It is argued that the treaty should have been ratified much earlier.
Se argumenta que el tratado debería haber sido ratificado mucho antes.
The artifacts must have been meticulously preserved for centuries.
Los artefactos deben haber sido preservados meticulosamente durante siglos.
혼동하기 쉬운
Learners mix up 'should have been done' with 'had been done'.
Both express necessity, but 'must have been' is for logical deduction.
Learners use 'could have been' for things that actually happened.
자주 하는 실수
It must been done.
It must have been done.
The car must have done.
The car must have been done.
He must has been seen.
He must have been seen.
It should have be done.
It should have been done.
The window should have broken.
The window should have been broken.
Could it have be stolen?
Could it have been stolen?
It must have been stole.
It must have been stolen.
The work must had been finished.
The work must have been finished.
It shouldn't have been happen.
It shouldn't have happened.
The cake must have being eaten.
The cake must have been eaten.
The report ought to been sent.
The report ought to have been sent.
It might have been being repaired.
It might have been under repair.
The money must have been disappeared.
The money must have disappeared.
It should have been done by now.
It should have been done by then.
문장 패턴
The ___ must have been ___ by ___.
It should have been ___ much ___.
Under no circumstances should the ___ have been ___.
Could the ___ have been ___ differently?
Real World Usage
In my last role, the workflow could have been better organized.
That party must've been lit!
The entry must have been forced from the outside.
This video should've been edited better.
The pizza should have been delivered hot.
The data might have been influenced by external variables.
The 'No-Blame' Strategy
The 'Of' Trap
Deduction vs. Regret
Softening Criticism
Smart Tips
Use the passive 'should have been' to focus on the task, not the person who failed.
Use 'must have been' to sound like a detective.
Avoid 'I think' and use 'It might have been' to sound more objective.
Remember it's actually 'should have'. Don't let native slang ruin your grammar!
발음
The 'Schwa' in 'have'
In natural speech, 'have' is almost never stressed. It reduces to /əv/.
The 'been' reduction
The word 'been' is often pronounced with a short 'i' sound like 'bin' rather than 'bean'.
Regret Intonation
It SHOULD have been done! ↘
Stress on the modal to emphasize the missed obligation.
Deduction Intonation
It MUST have been him. ↗
Rising intonation on the modal to show logical processing.
암기하기
기억법
M.H.B.P: Modals Have Been Perfect (Modal + Have + Been + Participle).
시각적 연상
Imagine a detective (Must) looking at a broken vase (Been Broken) and a crying child (Should Have Been Careful). The detective represents the deduction, the vase is the passive object, and the child represents the regret.
Rhyme
If it should have been done, but the race wasn't won, use 'have been' and the V3 for fun!
Story
A chef forgot the cake in the oven. The kitchen filled with smoke. He thought, 'The timer must have been ignored.' His boss said, 'The cake should have been taken out earlier.' Now, the burnt cake could have been sold, but it's ruined.
Word Web
챌린지
Look around your room. Find one thing that is messy or broken. Write one sentence about why it 'should have been fixed' or 'must have been moved'.
문화 노트
British speakers use 'ought to have been' slightly more frequently than Americans in formal contexts to express moral obligation.
Americans heavily favor 'should have been' over 'ought to' and frequently contract it to 'shoulda' in very casual speech.
This structure is used as a 'politeness strategy' to avoid blaming specific employees for mistakes.
The structure evolved from the Old English use of 'sculan' (shall/should) and 'motan' (must) combined with the developing perfect aspect in Middle English.
대화 시작하기
What is something in history that should have been done differently?
Look at this old photo. What must have been happening when it was taken?
If you could change one thing about your last project, what could have been improved?
Think of a famous mystery. How might the crime have been committed?
일기 주제
자주 하는 실수
Test Yourself
The window was open this morning. It ___ (must / leave) open by the cleaners.
Which of these sentences shows someone is unhappy about a past event?
Find and fix the mistake:
The documents should has been signed yesterday.
Active: Someone must have stolen my bike.
The word 'been' can be omitted in passive perfect modal constructions.
A: Why is the floor so wet? B: I don't know. It ___.
The treasure ___ (might / must / should) have been buried here.
Match each item on the left with its pair on the right:
Score: /8
연습 문제
8 exercisesThe window was open this morning. It ___ (must / leave) open by the cleaners.
Which of these sentences shows someone is unhappy about a past event?
Find and fix the mistake:
The documents should has been signed yesterday.
Active: Someone must have stolen my bike.
The word 'been' can be omitted in passive perfect modal constructions.
A: Why is the floor so wet? B: I don't know. It ___.
The treasure ___ (might / must / should) have been buried here.
1. Must, 2. Should, 3. Could
Score: /8
Practice Bank
12 exercisesThe new security flaw ___ discovered sooner by the QA team.
Many mistakes might been made if we rushed the launch.
Which sentence is grammatically correct?
Translate into English: 'La decisión debería haber sido tomada hace mucho tiempo.'
Arrange these words into a meaningful sentence:
Match each modal to its corresponding implication in passive perfect form:
The confidential documents ___ accessed without authorization.
Her concerns would have address if she had spoken up earlier.
Which sentence best expresses regret about a past passive event?
Translate into English: 'Él podría haber sido invitado a la fiesta.'
Form a grammatically correct sentence:
Match the sentence beginnings with their appropriate endings:
Score: /12
자주 묻는 질문 (8)
No. After a modal verb like `should` or `must`, you always use the base form `have`. Example: `It must have been done.`
They are almost identical in meaning. `Ought to` is slightly more formal and often implies a moral obligation, while `should` is more common in everyday English.
Without `been`, the sentence is active. `The car should have fixed` means the car was trying to fix something. `The car should have been fixed` means someone else was supposed to fix the car.
No. `Will have been done` is the Future Perfect Passive. This rule specifically covers 'modal' verbs like `should`, `could`, and `must` for the past.
Not quite. `Must have been` is a guess (deduction). `Had to be` is a past requirement. `He must have been tired` (I think he was). `He had to be tired` (It was a requirement for the role).
Move the modal to the start: `Should the meeting have been cancelled?`
Usually, `could` and `might` are similar, but `could` often implies a lost opportunity, while `might` is a pure guess about possibility.
Yes! It's great for talking about improvements: `The process could have been streamlined.` It shows you have an analytical mind.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Debería haber sido + participio
Spanish modals conjugate for person, whereas English modals are invariant.
Aurait dû être + participe passé
French requires agreement in gender and number for the past participle in passive forms.
Hätte ... gemacht werden sollen
The word order is drastically different, with the modal often coming last.
〜されるべきだった (sareru beki datta)
Japanese does not use an auxiliary like 'have' to indicate the perfect aspect; it uses the past tense of the copula.
كان يجب أن يتم (kana yajibu an yutamma)
Arabic lacks a direct 'modal' category like English; it uses verbs of necessity.
应该已经被... (yīnggāi yǐjīng bèi...)
Chinese verbs do not change form (no past participle), relying on particles for time.
Learning Path
Prerequisites
Learn These First
관련 동영상
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01:31 Top 10 Best Arnold Schwarzenegger Movie Quotes (Quickie)
13:23 What’s really happening in Iran right now
PASSIVE VOICE - English Grammar step-by-step
Arnel's Everyday English
Active and Passive Voice Tricks | Active Voice and Passive Voice in English Grammar | ChetChat
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