Category: Grammar Expansion
Modal Verbs
Modal Verbs
Modal verbs are auxiliary (helping) verbs that express ability, possibility, permission, obligation, or advice. They are followed by the base form of a verb (without "to").
Common modals: can, could, may, might, will, would, shall, should, must
Modal Verbs and Their Uses
1. CAN / COULD (Ability & Possibility)
- Ability: I can swim. / I could swim when I was 5.
- Permission: Can I use your phone?
- Possibility: It could rain tomorrow.
- Polite request: Could you help me, please?
2. MAY / MIGHT (Permission & Possibility)
- Permission (formal): May I come in?
- Possibility: She may be late. / It might rain.
- Wish: May you live long!
3. WILL / WOULD (Future & Requests)
- Future: I will call you tomorrow.
- Polite request: Would you open the door?
- Past habit: He would always help others.
- Conditional: I would go if I had time.
4. SHALL / SHOULD (Suggestions & Advice)
- Suggestion: Shall we go? / Shall I help you?
- Advice: You should study hard.
- Expectation: He should arrive soon.
5. MUST / HAVE TO (Obligation)
- Strong obligation: You must wear a seatbelt.
- Logical conclusion: He must be tired after the journey.
- External obligation: I have to work tomorrow.
6. NEED (Necessity)
- You needn't worry. (no necessity)
- You need to study more. (necessity)
Quick Summary Table
| Modal | Use | Example |
|---|---|---|
| can | ability, permission | I can drive. |
| could | past ability, polite request | Could you help? |
| may | permission, possibility | May I sit here? |
| might | possibility (less certain) | It might snow. |
| will | future, promise | I will help you. |
| would | polite request, conditional | Would you like tea? |
| shall | suggestion, offer | Shall we dance? |
| should | advice, recommendation | You should rest. |
| must | strong obligation, certainty | You must stop. |