List of Modal Verbs in English: Meanings and Examples

Modal verbs such as can, might, should, and must are easy to recognize, but their meanings are not always as simple as the usual one-word labels suggest. Can does more than show ability, must does more than express obligation, and will is not limited to future time.

A useful modal verb list should therefore show both the core modal verbs and the main meanings they can express. Looking at each modal in a sentence makes the differences much easier to see.

List of Core Modal Verbs in English

The nine core modal verbs are:

can, could, may, might, must, shall, should, will, would

Here is a quick reference:

These are common uses rather than complete definitions. The same modal can express different meanings in different contexts.

Can

Can commonly expresses ability, permission, general possibility, and requests.

Ability

Elena can speak three languages.

Permission

You can use my desk while I am away.

General Possibility

Mountain roads can become icy overnight.

Request

Can you carry this box for me?

The meaning changes with the sentence even though the modal itself remains can.

Could

Could is related to can, but it should not be treated simply as its past form.

Past Ability

Noah could read before he started school.

Possibility

The revised schedule could cause delays.

Polite Request

Could you check the total again?

Suggestion

We could take the earlier train.

Only the first example necessarily refers to past time. The others show why could = past can is too limited as a definition.

May

May commonly expresses possibility and permission.

Possibility

Sofia may arrive after dinner.

Permission

You may begin when you are ready.

Asking Permission

May I borrow your pen?

Permission with may can sound more formal than can in many situations, but the difference depends on context and register.

Might

Might commonly expresses possibility and can also make a suggestion more tentative.

Possibility

We might need another table.

Tentative Suggestion

You might want to check the address again.

May and might often overlap when they express possibility.

Although might can sound more tentative or remote in some contexts, it is not accurate to treat may and might as fixed levels on a certainty scale.

Must

Must has two especially important uses: obligation and strong deduction.

Obligation or Requirement

All visitors must sign in.

Personal Necessity

I must finish this before lunch.

Strong Deduction

The lights are still on. Maya must be inside.

The final sentence does not mean Maya is required to be inside. The speaker is drawing a strong conclusion from the evidence.

Shall

Shall is less common than will in everyday modern English, particularly in American English, but it still has several established uses.

Suggestion

Shall we leave now?

Offer

Shall I carry that bag?

Formal Use

We shall contact you when a decision has been made.

Shall also occurs in some legal and contractual writing, where its interpretation depends on the drafting context.

The older rule that simply pairs shall with I/we for future time does not describe ordinary modern usage well.

Should

Should commonly expresses advice, expectation, probability, and varying degrees of obligation.

Advice

You should save a copy of the receipt.

Expectation

The bus should arrive within ten minutes.

Expected Standard

Staff should keep their contact details current.

The force of should depends on context. It may sound like gentle advice in one sentence and a fairly strong expectation in another.

Will

Will frequently refers to future situations, but it has other established uses.

Prediction

Temperatures will fall overnight.

Willingness

I will help you with the boxes.

Intention or Promise

I will send the details this afternoon.

Immediate Decision

Someone is at the door. I’ll answer it.

Characteristic Behavior

Marcus will sometimes work late before a deadline.

This is why will is better understood as a modal with several uses rather than simply as a future-tense marker.

Would

Would also has several common meanings.

Hypothetical Situation

I would travel more if I had the time.

Polite Request

Would you close the door, please?

Preference

I would rather stay home tonight.

Repeated Past Behavior

Every summer, my grandfather would take us fishing.

Future Viewed from the Past

Nina said she would call after work.

The surrounding sentence tells you which meaning would carries.

What About Ought To?

Ought to is often taught alongside modal verbs because it expresses meanings such as advice, expectation, and duty.

You ought to apologize.

The parcel ought to arrive tomorrow.

However, it does not behave exactly like the nine core modals.

Compare:

You should check the figures.

with:

You ought to check the figures.

Because ought to has different grammatical properties, many descriptions treat it as a semi-modal rather than a core modal auxiliary.

Core Modals, Semi-Modals, and Other Modal Expressions

A list of expressions with modal meaning is broader than the list of core modal verbs.

Core Modal Verbs

can
could
may
might
must
shall
should
will
would

These form the central core modal group.

Semi-Modals

Depending on the grammatical framework, forms such as these may be discussed as semi-modals:

ought to
need
dare
used to

They share some properties with core modals but do not behave like them in every construction.

Other Expressions with Modal Meaning

English also has expressions such as:

have to
have got to
be able to
be going to

For example:

Maya has to leave early.

Leo is able to swim.

These expressions can communicate necessity, ability, future meaning, and other modal ideas without belonging to the nine-member core modal class.

Modal Verbs by Meaning

The same meaning can often be expressed by more than one modal.

This table is a quick reference, not a set of interchangeable formulas. The exact meaning and natural choice depend on context.

May vs. Might

Both may and might can express possibility.

The meeting may finish early.

The meeting might finish early.

In many situations, either is possible.

Might can sometimes make the possibility sound more tentative or remote, but the difference is not consistent enough to turn into a rule such as:

may = likely
might = unlikely

Context provides the finer distinction.

Can vs. Be Able To

Can is the core modal most closely associated with ability.

Priya can drive.

Be able to can express similar meaning:

Priya is able to drive.

The two are not grammatically identical.

Be able to is useful in structures where the restricted form system of can does not provide what English needs.

She has been able to work independently.

We will be able to leave tomorrow.

So be able to belongs to the wider group of modal expressions, not to the list of core modal verbs.

Must vs. Have To

Both must and have to can express obligation or necessity.

You must wear a helmet.

You have to wear a helmet.

Their emphasis can differ in particular contexts, but the familiar rule:

must = internal obligation
have to = external obligation

is too rigid to explain normal English usage.

They also differ grammatically.

She has to leave.

They had to leave.

Have to changes form in ways that core modal must does not.

The full contrast belongs to a dedicated comparison rather than to a modal list.

Should vs. Ought To

Should and ought to often overlap in meaning.

You should speak to your manager.

You ought to speak to your manager.

Both can express advice.

They can also express expectation:

The train should arrive soon.

The train ought to arrive soon.

For this list, the main distinction is grammatical: should belongs to the core modal set, while ought to is commonly treated separately as a semi-modal.

Shall vs. Will

Both shall and will can refer to future situations, but their modern distributions are different.

Will is the ordinary choice for most future reference:

We will contact you tomorrow.

Shall remains especially familiar in patterns such as:

Shall we begin?

Shall I open the window?

It also survives in some formal and legal contexts.

The traditional rule that mechanically assigns shall to I/we and will to other subjects is not a useful description of ordinary modern English.

One Modal Can Express More Than One Meaning

A modal verb is easier to understand when you compare its uses in complete sentences.

Consider can:

Ava can swim.

Ability.

You can leave now.

Permission.

Winters can be severe here.

General possibility.

Now consider must:

You must show identification.

Obligation.

That must be our taxi.

Strong deduction.

The modal form has not changed. Its interpretation comes from the rest of the sentence and the situation.

A Short Grammar Note

The nine core modal verbs share several distinctive grammatical properties.

They normally occur before a bare infinitive:

can drive
might happen
should wait

They do not take ordinary third-person singular -s:

Maya can swim.

not:

Maya cans swim.

They can also form negatives and questions directly:

Maya cannot attend.

Can Maya attend?

Modal Verb Examples in Sentences

Liam can repair the bicycle himself.

Can expresses ability.

Could you send the file again?

Could makes a polite request.

The delivery may arrive before noon.

May expresses possibility.

We might choose a different route.

Might presents a possible choice.

Passengers must remain behind the line.

Must expresses a requirement.

Shall we meet outside the entrance?

Shall introduces a suggestion.

You should check the measurements once more.

Should expresses advice.

I will call when the appointment ends.

Will expresses intention and future reference.

I would choose the smaller table.

Would expresses a hypothetical preference.

You ought to keep the original receipt.

Ought to expresses advice but is not part of the nine-member core modal set.

The curtains are open, so someone must be home.

Must expresses a strong deduction.

The spare key might be in the kitchen drawer.

Might expresses possibility.

The nine core modal verbs in English are can, could, may, might, must, shall, should, will, and would. Each can contribute more than one meaning, so the most useful way to learn the list is to connect each modal with the contexts in which it appears.

Expressions such as ought to, have to, and be able to can express similar modal ideas, but they do not all belong to the same grammatical class. Keeping the core list separate from these related expressions makes the modal system clearer without forcing each modal into a single definition.

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