What is modality in English?

Modality is the degree of certainty, obligation or force expressed by a word. High modality words express strong certainty or obligation (must, will, never, always, certainly). Low modality words express weaker, more tentative certainty (might, could, perhaps, sometimes). Writers adjust modality to sound authoritative and urgent, or measured and open, depending on their purpose.

What are examples of high modality words?

High modality words include must, will, shall, need, always, never, certainly, definitely, undoubtedly, essential, vital, crucial, obligated, required, and imperative. They express strong certainty or strong obligation and are common in persuasive writing, where they project authority and urgency and leave little room for disagreement.

What are examples of low modality words?

Low modality words include may, might, could, would, can, sometimes, often, perhaps, possibly, seems, suggests, arguably, and relatively. They express tentative or partial certainty. Writers use low modality to sound reasonable and open-minded, to hedge a claim they cannot fully prove, or to appear balanced before making a stronger point.

How do I analyse modality in a text?

Quote the high or low modality word, state whether it is high or low, and explain the effect. High modality projects authority, certainty and urgency, positioning the reader to accept the claim as beyond dispute. Low modality softens a claim, making the writer sound reasonable or cautious. Then link that effect to the writer's purpose, for example building trust or pressuring the reader to act.

When should I use high versus low modality in my own writing?

Use high modality when you want to sound authoritative and decisive, for example in a persuasive speech calling for action. Use low modality when you want to sound measured, acknowledge complexity, or hedge a claim you cannot fully support. Strong persuasive writing often opens with lower modality to appear reasonable, then shifts to high modality at the climax to drive the reader to a conclusion.

§-Explainer

SAgeneral

Modality: high and low modality words explained with examples (HSC, VCE, QCE 2026)

What modality means, the difference between high and low modality words, full example lists of each, and how to analyse modality for full marks in HSC, VCE and QCE English. Includes how high modality projects authority and how low modality softens a claim.

ExamExplained7 min readUpdated 2026-07-09

What modality is

Modality is the degree of certainty, obligation or force a word expresses. When a writer chooses between "this policy might help" and "this policy will help", they are choosing modality. That choice shapes how confident, urgent or reasonable the writer sounds, so modality is a key persuasive and stylistic technique in HSC, VCE and QCE English.

Modality sits on a scale from low to high:

High modality = strong certainty or strong obligation.
Low modality = weak, tentative or partial certainty.

High modality words

High modality words express strong certainty or strong obligation. They project authority, confidence and urgency, and they leave little room for disagreement.

Category	Examples
Certainty	certainly, definitely, undoubtedly, always, never, absolutely, clearly
Obligation	must, need, required, essential, vital, crucial, imperative
Future force	will, shall

Example: "We must act now. The evidence is undoubtedly clear, and delay is never an option."

The stacked high modality makes the statement feel beyond dispute and pressures the reader toward immediate agreement.

Low modality words

Low modality words express tentative or partial certainty. They make a writer sound measured, reasonable or cautious, and they are used to hedge claims that cannot be fully proven.

Category	Examples
Possibility	may, might, could, can, possibly, perhaps
Frequency	sometimes, often, occasionally
Tentative claim	seems, suggests, appears, arguably, relatively

Example: "This approach could help, and perhaps in some cases it might ease the problem."

The low modality signals openness and caution. It can make a writer sound fair, but too much of it can make an argument sound weak or unconvinced.

How to analyse modality

Worked example

Analyse a shift in modality

Text: A climate speech opens with "we can perhaps consider changes" and closes with "we must act, and we must act now."

Step 1: Identify the modality and quote it

The speech opens with low modality: "can", "perhaps", "consider". It closes with high modality: "must", "must ... now".

Step 2: Explain the effect of each

The low modality opening positions the speaker as reasonable and open-minded, inviting the audience to listen without feeling lectured. The high modality close projects certainty, urgency and moral obligation, leaving no room to dismiss the call to act.

Step 3: Link the shift to purpose

By moving from low to high modality, the speaker first earns the audience's trust, then converts that trust into pressure to act. The escalation mirrors the argument's own build from acknowledging complexity to demanding a decision, making the final call feel both reasonable and unavoidable.

The mark-earning move is explaining the effect of the modality (authority and urgency, or openness and caution) and linking it to the writer's purpose, not simply labelling a word as "high modality".

Using modality in your own writing

To sound authoritative: use high modality at the points where you want the reader to accept a claim as settled, especially in a persuasive climax.
To sound reasonable: use low modality when acknowledging complexity or a counter-argument, or when you cannot fully prove a claim.
The classic structure: open lower (reasonable), build higher (decisive). This mirrors how strong speeches move an audience.

For the full range of persuasive and literary devices, see the language techniques master list. For the closely related feeling-based technique, see emotive language.

Last updated: 2026-07-09. Rules change. For the official source see SACE Board.