Modal Verbs in English
can · could · should · must · have to · will · would · may · might · shall · need to
Golden Rule: Modal verbs are NEVER followed by "to" (except need to / have to / ought to). Always use the base verb: "You should go" ✓ — never "You should to go" ✗
💪
can / could — Ability, Permission, Requestcan = present ability, permission, informal request.
could = past ability, polite request, weaker possibility.
could = past ability, polite request, weaker possibility.
DailyCan you pass me the salt? (simple request)
DailyShe can speak three languages. (present ability)
DailyCould you help me with this bag? (more polite)
DailyIt could rain later — take an umbrella. (possibility)
DailyWhen I was young, I could run very fast. (past ability)
✓ RightI can drive — let me take you home.
✗ WrongI can to drive. ("to" after modals is wrong)
abilitypermissionpolite requestpossibility
💡
should / ought to — Advice & Expectationshould = give or ask for advice, expectation that something will happen.
ought to = slightly more formal/moral obligation. Same meaning as should.
ought to = slightly more formal/moral obligation. Same meaning as should.
DailyYou should drink more water. (health advice)
DailyShe should be home by now. (expectation)
DailyShould I bring anything to the party? (asking for advice)
DailyYou ought to apologise to him. (moral duty)
advicerecommendationexpectation
⚠️
must / have to / mustn't — Obligation & Prohibition
must = strong personal obligation OR logical conclusion.
have to = external obligation (a rule, a law, someone else's requirement).
mustn't = prohibition (DO NOT do this).
don't have to = not necessary — it's optional (very different from mustn't!).
have to = external obligation (a rule, a law, someone else's requirement).
mustn't = prohibition (DO NOT do this).
don't have to = not necessary — it's optional (very different from mustn't!).
DailyYou must submit the form today. (strong urgency)
DailyI have to wake up at 6 — my shift starts at 8. (external rule)
DailyYou mustn't park here — it's a fire zone. (prohibition)
DailyYou don't have to wear a tie — it's casual Friday. (optional)
LogicShe must be tired — she worked all night. (logical conclusion)
Common mistake: "mustn't" and "don't have to" are NOT the same!
"You mustn't eat that" = it's forbidden.
"You don't have to eat that" = you can if you want, but it's not required.
"You mustn't eat that" = it's forbidden.
"You don't have to eat that" = you can if you want, but it's not required.
obligationprohibitionnecessity
🔮
will / would — Future, Habit & Conditionalwill = future fact, spontaneous decision, offer, promise.
would = conditional/hypothetical, polite request, past habit.
would = conditional/hypothetical, polite request, past habit.
DailyI'll call you tonight. (future decision, made now)
DailyWould you like some coffee? (polite offer)
DailyWhen I was a child, we would play outside every evening. (past habit)
DailyIf I won the lottery, I would travel everywhere. (hypothetical)
DailyI will help you with that — don't worry. (promise)
futurepolite requestconditionalpast habit
🌤️
may / might — Possibility & Formal Permissionmay = about 50% possibility, or formal permission.
might = less certain possibility (around 30–40%). Also used for past possibility.
might = less certain possibility (around 30–40%). Also used for past possibility.
DailyI may come to the party — I'm not 100% sure yet.
DailyIt might snow tonight. (less certain than "may")
DailyMay I ask a question, please? (formal permission)
DailyShe might have left already — try calling her. (past possibility)
possibilityformal permission
🎩
shall / need to — Offer, Suggestion & Necessityshall (with I/we) = make an offer or suggestion. Mostly British English.
need to = necessity (as a regular verb). needn't = not necessary (modal form).
need to = necessity (as a regular verb). needn't = not necessary (modal form).
DailyShall I open the window for you? (offer)
DailyShall we meet at the café at 7? (suggestion)
DailyYou need to see a doctor about that cough. (necessity)
DailyYou needn't bring food — we have plenty. (not necessary)
offersuggestionnecessity
Quick Reference Table
| Modal | Main Use | Daily Example |
|---|---|---|
can | Ability / permission | I can swim. |
could | Polite request / past ability | Could you help me? |
should | Advice | You should sleep early. |
must | Strong obligation | You must wear a seatbelt. |
have to | External obligation | I have to go to work. |
mustn't | Prohibition | You mustn't smoke here. |
don't have to | Not necessary | You don't have to come. |
will | Future / promise | I'll call you later. |
would | Polite / conditional | Would you like some tea? |
may | Possibility (~50%) | It may rain. |
might | Possibility (~30%) | It might rain. |
shall | Offer / suggestion (I/We) | Shall I help? |
📢Advertisement336×280 — Rectangle