Modality: high and low modality words explained with examples (HSC, VCE, QCE 2026)
Modality is the degree of certainty or obligation a word expresses. High modality words (must, will, never, certainly, essential) project authority and urgency and leave little room for disagreement; low modality words (might, could, perhaps, sometimes, arguably) sound tentative, reasonable or cautious. To analyse modality for full marks, quote the word, state whether it is high or low, explain the effect (authority and urgency versus openness and caution), and link that effect to the writer's purpose.
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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
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.
Do not treat "high modality = good" and "low modality = bad". Both are deliberate choices. A skilled writer uses low modality on purpose to sound fair or to hedge. In analysis, always ask what effect the chosen modality creates, not whether it is high or low.
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.
Sources & how we know this
- English Advanced HSC standards materials (Paper 1 and Paper 2) — NSW Education Standards Authority (NESA) (2026)
- English: examination specifications, past examinations and reports — Victorian Curriculum and Assessment Authority (VCAA) (2026)
- English General senior syllabus — Queensland Curriculum and Assessment Authority (QCAA) (2026)
Last updated: 2026-09-23. Rules change. For the official source see TASC.