Modal Auxiliary Verbs

Modal Auxiliary Verbs (ভাবসূচক সাহায্যকারী ক্রিয়া)

Modal Verb কী?

Modal auxiliary মূল verb-এর সঙ্গে ability, permission, possibility, probability, obligation, advice, willingness, request বা deduction-এর মতো অর্থ যোগ করে।

প্রধান modals: can, could, may, might, shall, should, will, would, must, ought to। Semi-modals: need, dare, used to, have to, be able to, be supposed to।

Basic Structure

Modal + base verb (V1):

• She can sing.
• You should study.
• They may come.

Modal person বা number অনুযায়ী বদলায় না:

• I can swim.
• He can swim.
• They can swim.

সাধারণ modal-এর পরে to বা -s বসে না:

• Incorrect: He can to swim/sings.
• Correct: He can swim/sing.

Negative and Question

Modal-এর পরেই not; প্রশ্নে modal subject-এর আগে।

• She cannot come.
• You should not worry.
• Can she come?
• Should we begin?

Do/does/did ব্যবহার হয় না:

• Incorrect: Does he can swim?
• Correct: Can he swim?

Can

Present ability

• She can speak English.

Informal permission

• Can I use your pen?

General possibility

• Accidents can happen.

Request

• Can you help me?

Cannot/can't strong impossibility বা prohibition-ও বোঝাতে পারে:

• That cannot be true.
• You cannot enter this room.

Could

General past ability

• She could read at the age of five.

একটি নির্দিষ্ট past achievement-এর ক্ষেত্রে was/were able to বেশি স্বাভাবিক:

• The door was locked, but we were able to open it.

Polite request/permission

• Could you please help me?
• Could I ask a question?

Less certain possibility

• It could rain tonight.

Unreal ability

• If I had more time, I could learn another language.

May

Formal permission

• May I come in?

Possibility

• She may arrive today.

Wish

• May you succeed!
• May God bless you!

Purpose in formal structures

• Work hard so that you may succeed.

Might

কম নিশ্চয়তার possibility বা reported form:

• She might come later.
• He said that he might be late.

May এবং might-এর certainty সব context-এ নির্দিষ্ট percentage নয়; might সাধারণত বেশি tentative।

Shall

Modern English-এ প্রধানত offer, suggestion এবং formal requirement।

• Shall I open the window? — offer
• Shall we begin? — suggestion
• The applicant shall submit the form by Friday. — formal rule

Simple future-এ will সব person-এর সঙ্গে সাধারণ।

Should

Advice or duty

• You should revise regularly.

Expectation/probability

• The train should arrive soon.

Formal that-clause

• It is important that every student should participate.

Conditional inversion

• Should you need help, call me.

Will

Future prediction/fact

• It will rain tomorrow.

Instant decision

• I will answer the phone.

Promise or willingness

• I will help you.

Habit/characteristic

• He will often sit there for hours.
• Oil will float on water.

Would

Polite request/offer

• Would you help me?
• Would you like some tea?

Future in the past

• He said he would return.

Repeated past action

• Every evening, my grandfather would tell stories.

Unreal/conditional result

• I would travel more if I had time.

Preference

• I would rather stay home.

Would-এর পরে base verb; would rather-এর পরেও base verb।

Must

Strong obligation

• You must obey the rules.

Speaker-imposed necessity

• I must finish this today.

Strong deduction

• The lights are on; they must be home.

Prohibition

• You must not smoke here.

Mustn't = নিষেধ; needn't = প্রয়োজন নেই। এরা এক নয়।

Have to

External rule বা practical necessity:

• We have to wear uniforms.
• She had to leave early.

Must-এর সাধারণ past form হিসেবে had to ব্যবহৃত হয়।

Negative difference

• You mustn't go. — যাওয়া নিষেধ
• You don't have to go. — যাওয়ার দরকার নেই

Ought to

Moral duty, advice বা expected situation:

• We ought to respect others.
• The bus ought to arrive soon.

Ought-এর পরে to + V1 হয়।

Need

Main verb

• She needs to study.
• She does not need to study tonight.

Modal use

প্রধানত question ও negative-এ:

• Need I explain further?
• You need not worry.

Needn't-এর পরে base verb।

Dare

Main verb বা modal—দুইভাবে ব্যবহৃত হতে পারে।

• He does not dare to speak. — main verb
• He dare not speak. — modal use
• How dare you say that?

Used to

Past habit বা state যা এখন আর নেই:

• I used to live in Kolkata.
• She used to be shy.

Negative/question-এর পরীক্ষাভিত্তিক standard form:

• Did you use to play here?
• I did not use to like tea.

Be Used to and Get Used to

এগুলি modal নয়; এখানে to preposition, তাই noun/gerund বসে।

• I am used to waking early. — অভ্যস্ত
• She is getting used to living alone. — অভ্যস্ত হয়ে উঠছে

Compare:

• I used to wake early. — former habit
• I am used to waking early. — accustomed now

Be Able to

Can-এর বিকল্প; বিভিন্ন tense ও infinitive form তৈরি করতে পারে।

• She will be able to join us.
• I have been able to solve it.
• He wants to be able to speak fluently.

Had Better

Strong advice বা warning:

• You had better leave now.
• You had better not ignore the warning.

Had better-এর পরে base verb; past form হলেও present/future advice বোঝায়।

Would Rather

Preference:

• I would rather stay home.
• She would rather read than watch television.

Different subject হলে past form:

• I would rather you stayed here.

Modal + Be + V-ing

Present/future continuous deduction বা possibility:

• She may be sleeping.
• They must be waiting.

Modal + Have + V3

Past সম্পর্কে possibility, deduction, criticism বা unreal result।

Must have + V3

Strong past deduction:

• She must have forgotten the meeting.

May/Might/Could have + V3

Past possibility:

• He may have missed the bus.
• They might have taken another road.

Cannot/Could not have + V3

Past impossibility:

• She cannot have written this letter.

Should/Ought to have + V3

কাজ করা উচিত ছিল কিন্তু হয়নি; criticism/regret।

• You should have informed me.

Needn't have + V3

কাজটি করা হয়েছিল কিন্তু দরকার ছিল না।

• You needn't have bought food; we had enough.

Compare:

• You didn't need to buy food. — কাজটি করা হয়েছিল কি না স্পষ্ট নয়
• You needn't have bought food. — কিনেছিলে, কিন্তু দরকার ছিল না

Would have + V3

Unreal past result:

• I would have helped if I had known.

Degrees of Certainty

Context অনুযায়ী সাধারণ scale:

• must be = strong positive deduction
• may/might/could be = possibility
• can't be = strong negative deduction

• She has practised all year; she must be prepared.
• She is not answering; she may be busy.
• He is abroad; he can't be in the office.

Permission: Can, Could and May

• Can I…? — ordinary/informal
• Could I…? — polite/tentative
• May I…? — formal

Past general permission often could; particular permitted action often was/were allowed to।

Advice: Should, Ought to, Had Better

• should = ordinary advice
• ought to = advice/moral duty
• had better = strong advice with possible consequence

• You should rest.
• We ought to help the poor.
• You had better see a doctor.

Requests: Politeness

• Can you help me?
• Could you help me?
• Will you open the door?
• Would you mind opening the door?

Would you mind-এর পরে gerund ব্যবহৃত হয়।

Common Errors

• Incorrect: He can sings.

Correct: He can sing.

• Incorrect: She may to come.

Correct: She may come.

• Incorrect: You mustn't come if you do not want to.

Intended meaning: You needn't/don't have to come.

• Incorrect: I am used to get up early.

Correct: I am used to getting up early.

• Incorrect: You had better to leave.

Correct: You had better leave.

• Incorrect: He should have went.

Correct: He should have gone.

• Incorrect: She was able to sing when she was five, if meaning general ability.

More natural: She could sing when she was five.

A Reliable Solving Method

1. Sentence ability, permission, advice, necessity, possibility না deduction—কোন meaning চায় তা নির্ধারণ করুন।
2. Time present, past না future দেখুন।
3. Modal-এর পরে V1, be + V-ing, be + V3 বা have + V3—কোন pattern দরকার দেখুন।
4. Negative meaning prohibition না absence of necessity—পার্থক্য করুন।
5. Formality ও politeness level দেখুন।
6. Used to এবং be used to গুলিয়ে ফেলবেন না।