Modals - English Language & Comprehension for SSC CGL

Introduction

Modal verbs, or modal auxiliary verbs, are a distinct class of auxiliary verbs in English that modify the meaning of the main verb. They express notions such as ability, permission, obligation, possibility, probability, requests, offers, suggestions, habits, and hypothetical situations. Modals usually do not take typical verb endings (they do not add -s, -ed or -ing) and they are followed by the base form of the main verb (bare infinitive) without to, except in a few semi-modal constructions (for example, ought to, have to, be to, used to, need in some uses).

Common modal verbs include: can, could, may, might, shall, should, will, would, must. Semi-modals and related expressions are: ought to, have to, need, be to, and used to.

Can

Can is used to express ability, permission, possibility, requests, offers and informal suggestions. It refers to present ability or general possibilities.

Uses and examples:

• Permission: Can I go to the washroom?
• Can I use your phone, please?
• Can I go shopping today?
• Can we go river rafting?
• Can I eat pizza today?
• Possibility: Anyone can be the culprit.
• Smoking can cause cancer.
• You can catch that train at 9:00 a.m.
• He can guess why she is happy.
• There can be a fire in the factory.
• Ability: You can achieve your goal by regular practice.
• Tom can write in many languages.
• I can play the guitar very well.
• We can perform very well in the competition.
• She can bake very delicious cakes.
• Request: Can you please help me in solving this question?
• Can you wait a moment, please?
• Can I have your phone number?
• Can you please get me a glass of water?
• Can you please switch off the light?
• Doubt / tentative possibility: Can you eat an entire pizza?
• It can be very cold here in winter.
• Can she participate in the quiz today?
• Can he drive the car such a long distance?
• Can you do well in English this time?
• Offer: Can I get some water for you?
• I can lend you my car till tomorrow.
• Can I help you in finishing this project?
• Can I do something for you?
• If you like, I can carry the vegetable bags for you.
• Suggestion: Can we visit the zoo at the weekend?
• If you want, we can go on vacation next week.
• You can apply ointment to your bruises.
• To reach early, you can book a taxi.
• You can come to my house whenever you are free.

Could

Could is the past form of can but it also functions as a polite modal for requests and offers and to indicate possibility or hypothetical situations.

Uses and examples:

• Past ability: I could play the piano when I was a child.
• He could play football very well when he was a child.
• Neha could drive perfectly when she was 16 years old.
• I could speak four languages when I was ten years old.
• Polite request: Could you lend me some money?
• Could you please tell me where the restroom is?
• Could you please make dinner tonight as I am not feeling well?
• Could you please repeat the question?
• Could you open the door, please?
• Permission (politer / more tentative): Could I please use your phone?
• Could I please go to the park?
• Could I ask a few questions about Maths?
• Could I borrow your notes for two days?
• Possibility / hypothetical: Extreme heat could cause a shortage of water in some areas.
• He could go to jail for stealing the necklace.
• We could write a letter to the principal.
• A lot of accidents could be prevented.
• You could have called her. (past possibility / reproach)
• Suggestion: You could see a movie or go out to dinner.
• If you want, we could go to a movie tonight.
• I could help you with your homework.
• If you had come with me, we could have had fun. (conditional)

May

May expresses permission, possibility, and formal requests or wishes. It is somewhat more formal than can when used for permission.

Uses and examples:

• Possibility: She may be at the office.
• There may be other reasons that she knows.
• This food may produce a rancid smell.
• I may read a book today.
• He may be working for us.
• Permission (formal): May I come into the classroom?
• May I go there for some time?
• May I speak to Miss Tina, please?
• You may sit in the front seat of the car.
• You may have another piece of pizza if you want.
• Polite request: May I have the bill, please?
• May I sit at the next seat?
• May I help you in doing this work?
• May I have some water, please?
• May I use your phone?
• Wish / blessing: May you have a happy and safe journey.
• May you both have a happy married life.
• May you be blessed with a little one.
• We've had great success this year; may we continue to do so for years to come.

Might

Might generally indicates a weaker probability than may, is used for tentative suggestions, and appears in conditional sentences to show hypothetical outcomes.

Uses and examples:

• Possibility (less certain): She might go to a party today.
• Meera might go to the movie tomorrow.
• Your phone might be in the drawing room.
• Rohan might like playing cricket.
• It might get late, so take your lunch.
• Suggestion: You might try this new recipe.
• You might want to take a cup of coffee.
• You might try these new question banks.
• If it is an infection, you might need an antibiotic.
• Condition / hypothetical: If I didn't have to work, I might go with you.
• If I participate in the competition, I might win.
• If you work hard, you might score well.
• They might come to school if they are well.
• Polite tentative request: Might I borrow your book?
• Might I ask who has been invited to the party?
• He asked if he might borrow the crockery.

Shall

Shall is used mainly with I and we for offers, suggestions, formal statements of the future, and instructions in formal or legal styles. In contemporary everyday English, will is often used to form the future, but shall survives in formal registers and offers/suggestions.

Uses and examples:

• Suggestion / offer: Shall we begin the debate?
• Shall I get tickets for the concert?
• Shall I call you after the classes?
• Shall we book a cab for home?
• Shall I close the window as it is windy outside?
• Promise / formal future: I shall be there at sharp 7:00 a.m.
• I shall take care of my grandmother.
• We shall remember this day forever.
• Instruction / obligation (formal/legal): Candidates shall remain in their seats until all the papers have been collected.
• You shall not lie to your elders. (formal prohibition)
• Students shall not enter here. (notice/instruction)

Should

Should is used to give advice, make recommendations, express expectation or mild obligation, and indicate probability.

Uses and examples:

• Advice / recommendation: You should try to focus more on your speaking skills.
• You shouldn't smoke as it is harmful to health.
• You should start working hard for the exams.
• You should have done more practice before the event.
• You should try to lose weight to remain healthy.
• Obligation / duty (weaker than must): We should report the incident.
• I really should be in the office by 7:00 a.m.
• You should be wearing your seat belt while driving.
• He should have been more careful.
• We should return the book before the library closes.
• Probability / expectation: Mehak should be at home now, so you can call her.
• The weather should get better soon.
• By now, they should already be in an interview.

Will

Will is used to form the simple future, make promises, express willingness, offers, requests, commands (in certain tones), and to predict future events.

Uses and examples:

• Future / prediction: We will go for a movie tomorrow.
• They will visit their grandmother's house next week.
• By next year all the deals will be finalised.
• Request / favour: Will you take the parcel for me, please?
• Will you help me with my Chemistry assignment?
• Will you water the plants while I am away?
• Offer / willingness: I will wash my plates after finishing my meal.
• I will help you in arranging these files.
• Order / command (forceful): Will you stop asking such silly questions!
• You will do as you are told!
• Question about the future: Will we have a test in Maths class?
• Will there be a holiday tomorrow?

Would

Would is used as the past form of will in reported speech, to form conditional sentences, and as a polite form for offers, requests and hypothetical statements.

Uses and examples:

• Polite offer / invitation: Would you like to sit here?
• Would you like to have a cup of coffee?
• I would help you in solving Maths problems.
• Polite request: Would you give me the water, please?
• Would you help me in carrying these bags?
• Refusal / negative tendency: She would not let Megha use her phone.
• He would not lend the money to me.
• Conditional: If she won the prize, she would give us a treat.
• If I had won the lottery I would purchase a new house.
• Future in the past / reported speech: He promised he would meet me.
• I thought it would rain so I brought my umbrella.

Must

Must expresses strong obligation, necessity, deduction (logical conclusion), recommendation, and prohibition. It is stronger than should for obligation.

Uses and examples:

• Obligation / necessity: You must wear a mask when you are in public places.
• You must tie your hair neatly while preparing food.
• All the members must bring their files tomorrow.
• Students must remain seated until the lecture is over.
• You must wear a seat belt while driving.
• Advice / recommendation (strong): You must read this book; it is so interesting.
• You must try butterscotch cake; it is so tasty.
• She must go home as she is not feeling well.
• You must not eat too much junk food.
• Orders: You must complete this work by Friday.
• You must return her notes now.
• Deduction (logical conclusion): There must be some mistake in the question paper.
• The ground was wet this morning. It must have rained last night.
• He must have tried hard to get a new job.
• Prohibition: You must not make noise in the library.
• Students must not talk while writing an exam.
• You must not talk on the phone while driving.

Semi-modals and Related Expressions

Some expressions behave like modals though they are not single-word modal auxiliaries. These include ought to, have to, need, be to, and used to. They are important in competitive exams and formal English.

• Ought to - advice or moral obligation, similar to should. Example: You ought to apologise to her.
• Have to - external obligation or necessity (often from rules, circumstances). Example: I have to submit the report by Friday.
• Need - necessity; used as a modal in negative and interrogative forms in some varieties: Need I say more?
• Be to - formal arrangements, scheduled events, or orders. Example: The president is to arrive at noon.
• Used to - past habitual action no longer true. Example: I used to get up early when I was at school.

Guidelines and Common Contrasts

Some common contrasts and points to remember:

• Can vs Could: Can for present ability; could for past ability or polite requests and hypothetical situations.
• May vs Might: May often denotes a reasonable possibility or formal permission; might suggests weaker possibility or is used in counterfactual conditional clauses.
• Must vs Have to: Must often expresses speaker's strong view of obligation; have to indicates obligation imposed by circumstances or external rules.
• Will vs Shall: In modern English, will is the usual future marker; shall remains in formal uses and in offers/suggestions with I/we.
• Politeness: Use could/would/might for polite requests; can/will are less formal.

Common Errors and Corrections

Typical mistakes to avoid:

• Avoid adding -s to modals: say He can, not He cans.
• Do not follow a modal with to plus base verb (except for semi-modals like ought to): say She should go, not She should to go.
• Please use the correct verb form after modals: modals are followed by the base (bare infinitive), e.g., can play, must do, should have.
• Choose the modal appropriate to meaning: for polite requests use could/would, for obligation use must/have to, for ability use can/could.

Final Notes

Understanding modals combines meaning and form: learn the primary uses of each modal, practise by forming sentences for different functions (permission, ability, obligation, possibility, requests, offers, suggestions), and pay attention to register (formal versus informal). Exercises in identifying the correct modal in context and converting sentences between modals will strengthen exam performance and spoken accuracy.