तार्किक असंभवता (यह नहीं हो सकता!)
Grammar Rule in 30 Seconds
Use 'can't' to say you are 100% sure something is impossible based on the evidence you see.
- Use 'can't + base verb' for present impossibility: 'He can't be home.'
- Use 'can't have + past participle' for past impossibility: 'She can't have left.'
- Never use 'mustn't' for logical impossibility; 'mustn't' is for prohibition only.
Overview
That is impossible नहीं कहते। हम एक खास शब्द can't का इस्तेमाल करते हैं। जब आप तथ्यों या तर्क के आधार पर 99% सुनिश्चित होते हैं कि कुछ सच नहीं है, तो आप इस नियम का उपयोग करते हैं। यह अनुमति के बारे में नहीं है; यह तर्क के बारे में है («वह भूखा नहीं हो सकता, उसने अभी 5 पिज्जा खाए हैं»)।How This Grammar Works
must का उल्टा मानें। अगर must का मतलब है कि आप सुनिश्चित हैं कि यह सच है, तो can't का मतलब है कि आप सुनिश्चित हैं कि यह सच नहीं है। यह अविश्वास या तार्किक असंभवता को व्यक्त करता है।
Formation Pattern
cannot)
When To Use It
can't be सो नहीं रहा होगा।"can't be serious!" (तुम मजाक कर रहे हो!)can't be real." (यह फोटो असली नहीं हो सकती।)
Common Mistakes
must not का उपयोग करना। अमेरिकी अंग्रेजी में, must not का मतलब आमतौर पर मनाही होता है। असंभवता के लिए, can't सबसे अच्छा है।It must not be cold.
can't be cold."can't has a dog."can't have a dog."Contrast With Similar Patterns
can't sit here." (नियम कहते हैं नहीं)।can't be rain." (तर्क कहता है नहीं)।It must be true बनाम "It can't be true."Quick FAQ
cannot, can't जैसा ही है?हाँ! Cannot बस थोड़ा औपचारिक है।
नहीं! भूतकाल के लिए यह जटिल है (can't have been)। अभी वर्तमान पर टिके रहें।
आमतौर पर नहीं। दोस्तों के बीच "You can't be serious" कहना बहुत सामान्य है।
Forming Logical Impossibility
| Tense | Subject | Modal | Auxiliary/Verb | Example |
|---|---|---|---|---|
|
Present
|
I/You/He/She/It/We/They
|
can't
|
be / do / go
|
It can't be true.
|
|
Present Continuous
|
I/You/He/She/It/We/They
|
can't
|
be + -ing
|
They can't be sleeping.
|
|
Past
|
I/You/He/She/It/We/They
|
can't
|
have + past participle
|
She can't have left.
|
|
Past Continuous
|
I/You/He/She/It/We/They
|
can't
|
have been + -ing
|
He can't have been driving.
|
Contractions
| Full Form | Contraction | Usage Note |
|---|---|---|
|
cannot
|
can't
|
Most common in speech and informal writing.
|
|
cannot have
|
can't have
|
Commonly used for past deductions.
|
|
could not
|
couldn't
|
Used for past ability or less certain deduction.
|
Meanings
The use of the modal verb 'can't' to express a firm belief that something is not true or impossible because the facts or situation suggest otherwise.
Present Impossibility
Expressing that a current state or action is impossible right now.
“You've just eaten a whole pizza; you can't be hungry!”
“That can't be the right answer; it doesn't make sense.”
Past Impossibility
Expressing that an event in the past was impossible.
“She can't have stolen the money; she was with me all day.”
“They can't have finished the project already; they only started an hour ago.”
Theoretical Impossibility
Used in scientific or mathematical contexts to state that something is fundamentally impossible.
“A triangle can't have four sides.”
“Nothing can't travel faster than the speed of light.”
Reference Table
| Subject (कर्ता) | Present Impossibility (अभी) | Past Impossibility (बीता हुआ) | Example (Present) | Example (Past) |
|---|---|---|---|---|
|
I
|
can't be
|
couldn't have been
|
I can't be late again.
|
I couldn't have been serious.
|
|
You
|
can't be
|
couldn't have been
|
You can't be hungry already!
|
You couldn't have finished already.
|
|
He/She/It
|
can't be
|
couldn't have been
|
He can't be home yet.
|
She couldn't have known.
|
|
We
|
can't be
|
couldn't have been
|
We can't be lost.
|
We couldn't have forgotten.
|
|
They
|
can't be
|
couldn't have been
|
They can't be right.
|
They couldn't have told us.
|
औपचारिकता का स्तर
It is highly improbable that such a statement is accurate. (Reacting to a rumor)
That can't be true. (Reacting to a rumor)
No way! That's impossible. (Reacting to a rumor)
Cap! (AAVE) / You're kidding, right? (Reacting to a rumor)
लॉजिकल नामुमकिन: Can't Be!
वर्तमान/भविष्य
- Can't be It's impossible that it is
- Can't + verb Subject cannot perform action
बीता हुआ समय
- Couldn't have been It's impossible that it was
- Couldn't have + past participle Subject could not have performed action
मुख्य अंतर
- Must be Logical certainty (positive)
- Mustn't Prohibition (not impossibility)
Can't Be vs. May Not Be vs. Mustn't Be
क्या 'Can't Be' इस्तेमाल करना चाहिए?
क्या आप पक्के यकीन से कह रहे हैं कि कुछ गलत है?
क्या यह वर्तमान या भविष्य की बात है?
क्या यह बीते समय की बात है?
इसका इस्तेमाल कब करें
अविश्वास/हैरानी
- • अजीब अफवाहें सुनना
- • अचानक आए नतीजे
- • चौंकाने वाली खबरें
उलटे सबूत
- • रहस्यों में पक्का सबूत
- • तथ्यों की जाँच
- • गलत जानकारी सुधारना
आम समझ/लॉजिक
- • उम्र और कामयाबी
- • मौसम और कपड़े
- • शेड्यूल और दावे
स्तर के अनुसार उदाहरण
He can't be 5 years old; he is very tall.
He can't be 5 years old; he is very tall.
It can't be raining; the sun is shining.
It can't be raining; the sun is shining.
You can't be hungry again!
You can't be hungry again!
That can't be my bag; mine is blue.
That can't be my bag; mine is blue.
She can't be at work; it's Sunday.
She can't be at work; it's Sunday.
They can't be tired; they slept for ten hours.
They can't be tired; they slept for ten hours.
This can't be the right road; we are lost.
This can't be the right road; we are lost.
He can't be the winner; he finished last.
He can't be the winner; he finished last.
You can't have seen her; she moved to Australia last year.
You can't have seen her; she moved to Australia last year.
He can't have finished the exam already; it's only been ten minutes.
He can't have finished the exam already; it's only been ten minutes.
They can't be living here; the house is completely empty.
They can't be living here; the house is completely empty.
It can't have been a ghost; ghosts don't exist.
It can't have been a ghost; ghosts don't exist.
The witness can't be telling the truth; her story keeps changing.
The witness can't be telling the truth; her story keeps changing.
You can't have been paying attention if you didn't hear the alarm.
You can't have been paying attention if you didn't hear the alarm.
The results can't have been faked; the lab is very reputable.
The results can't have been faked; the lab is very reputable.
He can't be serious about quitting his job now.
He can't be serious about quitting his job now.
The economy can't possibly recover as quickly as the government claims.
The economy can't possibly recover as quickly as the government claims.
Surely he can't have been so naive as to believe their promises.
Surely he can't have been so naive as to believe their promises.
The manuscript can't be an original; the ink is far too modern.
The manuscript can't be an original; the ink is far too modern.
You can't have failed to notice the tension in the room.
You can't have failed to notice the tension in the room.
One cannot but conclude that the hypothesis can't be sustained under such scrutiny.
One cannot but conclude that the hypothesis can't be sustained under such scrutiny.
The sheer scale of the project means it can't have been undertaken without significant capital.
The sheer scale of the project means it can't have been undertaken without significant capital.
It can't be overemphasized how critical this junction was in history.
It can't be overemphasized how critical this junction was in history.
He can't have been anything other than devastated by the news.
He can't have been anything other than devastated by the news.
आसानी से भ्रमित होने वाले
Learners think 'mustn't' is the negative of 'must' for logic, but it's only for rules.
In the past, both 'can't have' and 'couldn't have' are used for deduction.
Learners use 'can't' when they are only slightly unsure.
सामान्य गलतियाँ
He no can be here.
He can't be here.
It can't to be true.
It can't be true.
She can't is happy.
She can't be happy.
I can't be hungry.
I'm not hungry.
You mustn't be hungry.
You can't be hungry.
He can't be at home yesterday.
He can't have been at home yesterday.
That don't can be right.
That can't be right.
She can't had seen him.
She can't have seen him.
It can't be happened.
It can't have happened.
He can't be knowing the answer.
He can't know the answer.
It can't have been being done.
It can't have been done.
वाक्य संरचनाएँ
It can't be ___ because ___.
You can't have ___ already!
He can't be ___ing right now.
There can't have been any ___.
Real World Usage
This photo can't be real; it looks photoshopped.
There can't have been a mistake in my application.
This can't be the right gate; the flight number is different.
This can't be my order; I'm a vegetarian and this is pepperoni.
He can't be serious! 😱
The data cannot be reconciled with the previous findings.
उल्टा सोचो!
यहाँ 'mustn't' मत लगाना!
ज़ोर देने के लिए 'possibly' जोड़ें
बोलने का अंदाज़ ज़रूरी है
Smart Tips
Immediately reach for 'can't be'. It's the most natural way to express this in English.
Use 'can't have' to sound more persuasive and analytical.
Use the phrase 'You can't be serious!' to show immediate disbelief.
Use 'cannot' instead of 'can't' and add 'possibly' for academic weight.
उच्चारण
The 't' in can't
In American English, the 't' is often a 'stop t', meaning the tongue stops the air but doesn't release it. In British English, the 'a' is long /kɑːnt/.
Contraction stress
We usually stress 'can't' more than 'can' to make the negative clear.
Rising-Falling for Disbelief
That can't be ↘ right!
Strong emphasis on the impossibility.
याद करें
स्मृति सहायक
C.A.N.T. stands for Certainty Against New Truths.
दृश्य संबंध
Imagine a detective holding a magnifying glass over a clue that has a big red 'X' through it. The 'X' represents 'can't'.
Rhyme
If the facts say no, and you're sure it's so, use 'can't' to let the logic flow.
Story
A man sees his friend's car in the driveway, but the house is dark. He thinks, 'He must be home.' Then he sees his friend post a photo from Hawaii on Instagram. He realizes, 'He can't be home!' The Instagram post is the evidence that changes his deduction.
Word Web
चैलेंज
Look around your room. Find three things that 'can't' be true right now (e.g., 'My cat can't be a dog'). Say them out loud.
सांस्कृतिक नोट्स
British speakers use 'can't' frequently in social situations to politely disagree. Instead of saying 'You are lying,' they might say 'That can't be right, surely?'
Americans often use 'No way' or 'Get out of here' as idiomatic substitutes for 'That can't be true' in casual conversation.
In scientific papers, 'cannot' is preferred over 'can't' to maintain a formal tone when dismissing theories.
The word 'can' comes from the Old English 'cunnan', meaning 'to know' or 'to know how to'.
बातचीत की शुरुआत
Look at that person over there wearing a winter coat in summer. Why are they doing that?
I heard that our teacher is actually a secret agent. What do you think?
The store is closed, but the lights are on inside. Why?
My phone says it's 2050. Is it broken?
डायरी विषय
सामान्य गलतियाँ
Test Yourself
He's only 16, so he ___ a licensed driver yet.
Find and fix the mistake:
They mustn't be home. Their car isn't in the driveway.
Arrange the words in the correct order:
All words placed
Click words above to build the sentence
Score: /3
अभ्यास प्रश्न
8 exercisesThe lights are off. He ___ be at home.
You ___ (see) him yesterday; he was in Paris.
Find and fix the mistake:
He mustn't be the thief because he has an alibi.
I am sure that isn't your car.
We use 'mustn't' when we are 100% sure something is not true.
A: I just saw a UFO! B: You ___ serious!
Select the correct sentence.
1. The car is gone. 2. He's only 10. 3. It's summer.
Score: /8
Practice Bank
12 exercisesShe said she was busy, so she ___ at the party last night.
The meeting mustn't start without the boss.
सही वाक्य चुनें:
इंग्लिश में अनुवाद करें: 'ऐसा हो ही नहीं सकता कि उसने यह किया हो।'
शब्दों को सही क्रम में लगाएँ:
हालात को सही नामुमकिन बात से मिलाएँ:
Judging by the size, this ring ___ real diamonds; it's too cheap.
My cat weren't able to open the fridge.
कौन सा वाक्य सही है?
इंग्लिश में अनुवाद करें: 'यह सच नहीं हो सकता!'
शब्दों को सही क्रम में लगाएँ:
Given the traffic, they ___ arrived at the airport on time.
Score: /12
अक्सर पूछे जाने वाले सवाल (8)
Yes, for past deductions like `couldn't have been`, they are very similar. In the present, `couldn't` sounds slightly less certain or more hypothetical than `can't`.
In English, `mustn't` specifically means 'it is forbidden'. If you say 'He mustn't be rich,' it sounds like you are telling him he is not allowed to be rich!
Yes, `cannot` is used in formal writing and for strong emphasis. In daily speech, `can't` is much more natural.
Use the formula: `can't + have + past participle`. For example: 'He can't have forgotten.'
No, it can also mean a lack of ability ('I can't swim') or lack of permission ('You can't go out'). Context tells you which one it is.
Absolutely. 'He can't be the doctor' is a very common way to express deduction about a person's identity or role.
If you have any doubt, use `might not` or `may not`. Only use `can't` when you are effectively 100% sure based on the evidence.
Rarely. We usually use 'Can...?' or 'Could...?' for questions. 'Can it be true?' is more common than 'Can't it be true?'
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
No puede ser
English distinguishes strictly between 'mustn't' (prohibition) and 'can't' (logic).
Ce ne peut pas être
French uses the passé composé of 'pouvoir', while English uses a modal perfect.
Das kann nicht sein
German 'muss nicht' means 'don't have to', which is a different modal category entirely.
~hazu ga nai (~はずがない)
Japanese uses a noun-based construction ('hazu' means expectation).
la yumkin an yakun (لا يمكن أن يكون)
Arabic uses a full clause structure rather than a simple modal verb.
bù kěnéng (不可能)
Chinese doesn't conjugate for tense, so 'can't be' and 'can't have been' look the same without time markers.
Learning Path
Prerequisites
संबंधित वीडियो
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05:14 10 Best Things to Do in Edinburgh (+ Hidden Gems by a Local)
22:32 productive days at university 👩🏻🎓7AM morning routine, final year, grwm for 4 hours of class
Must be, Can't be, May be - Modal Verbs in Hindi
Dear Sir
Can't have vs Couldn't have - Past Impossibility
Learnex - English lessons through Hindi
Modals of Deduction: Must, Can't, Could, May, Might
Dear Sir
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