Secondary 2 · English · Language
Modality and word choice
Explore high, medium and low modality words (must, should, might) and how they make statements sound certain, tentative or polite.
Awaiting educator review. This material was drafted by our content team with AI assistance and is waiting for review by a qualified educator. Please check it suits your child before using it. Created 10 October 2026. How we review
These lessons were written around Australian Curriculum strands and matched to Singapore levels by age (Primary 1 is the first year of primary school). They are not aligned to MOE syllabuses or the PSLE, so check them against the syllabus your child is working towards.
Learning goals
Learners will
- Classify words as high, medium or low modality.
- Recognise that modality can be expressed through verbs, adverbs, adjectives and nouns.
- Explain and choose modality to make statements sound certain, tentative or polite.
Success looks like
- I can sort modal words into high, medium and low.
- I can explain why a writer chose high or low modality in a particular text.
- I can rewrite a sentence to change its modality for a different purpose or audience.
The big idea
Modality is how certain, forceful or obligated a statement sounds. Compare: 'You must wear a helmet', 'You should wear a helmet' and 'You might want to wear a helmet.' The facts are the same, but the force changes completely.
Modality sits on a scale from high to low:
- High: must, will, shall, have to, need to, always, never, certainly, definitely, undoubtedly, it is essential.
- Medium: should, would, ought to, probably, likely, usually, often.
- Low: might, may, could, can (as a possibility), possibly, perhaps, sometimes, it is possible.
Modality is not only carried by modal verbs. It also appears in adverbs ('certainly', 'possibly'), adjectives ('it is essential', 'it is unlikely') and nouns ('there is a chance', 'a certainty').
Why choose high modality? Persuasive writers, rule-makers and safety signs use it to sound confident and authoritative: 'Smoking will damage your lungs.' But overusing it can make a writer sound bossy or overconfident.
Why choose low or medium modality? Scientists and careful writers hedge when evidence is not complete: 'These results suggest the treatment may reduce symptoms.' Low modality is also polite: 'Could you possibly help me?' sounds gentler than 'Help me.'
When analysing a text, comment on modality and its effect: 'The writer's repeated use of must creates an urgent, commanding tone, leaving the reader little room to disagree.'
Worked examples
Sorting by modality
Rank from highest to lowest modality: 'It might rain.' / 'It will rain.' / 'It should rain.'
- 'Will' expresses certainty: high.
- 'Should' expresses expectation but some doubt: medium.
- 'Might' expresses possibility only: low.
Answer: 'It will rain.' (high) → 'It should rain.' (medium) → 'It might rain.' (low)
Raising modality for persuasion
Rewrite this to sound more persuasive: 'Perhaps the council could think about adding more bins to the park.'
- Find the low-modality words: 'perhaps', 'could', 'think about'.
- Replace them with high-modality alternatives such as 'must' and 'immediately'.
- Check the new sentence sounds confident without becoming rude.
Answer: 'The council must add more bins to the park immediately.'
Lowering modality for accuracy and politeness
A student writes in a science report: 'This experiment proves that music always helps plants grow.' Rewrite it more appropriately.
- One small experiment cannot 'prove' something is 'always' true, so the modality is too high.
- Replace 'proves' with 'suggests' and 'always helps' with 'may help'.
- Add a limit to the claim, such as 'in this experiment'.
Answer: 'The results of this experiment suggest that music may help some plants grow.'
Practice check
Have a go, then check your answers. Each answer comes with an explanation.
Answer guide for parents
Which word has the highest modality?
must — 'Must' expresses strong obligation or certainty.
Which word expresses medium modality?
should — 'Should' sits in the middle: an expectation rather than a certainty.
What is the modal verb in this sentence? 'You might find the answer in chapter two.'
might — 'Might' is a low-modality modal verb expressing possibility.
Why do scientists often write 'the results suggest this may…' rather than 'this proves…'?
To be cautious and accurate, since evidence is rarely complete — Lower modality (hedging) avoids overstating what the evidence shows.
Which request sounds the most polite?
Could you please pass the salt? — Low modality ('could') and 'please' soften the request.
Is the word 'possibly' high, medium or low modality? (one word)
low — 'Possibly' suggests something is only a possibility.
Which version of the sentence has the highest modality?
Students must bring a water bottle. — 'Must' turns the sentence into a firm requirement.
A speaker says, 'We will win this fight, and we will never give up.' What is the main effect of the high modality?
It makes the speaker sound confident and determined, inspiring the audience. — 'Will' and 'never' express certainty, creating a determined, rousing tone.
Watch out for
- Thinking modality only comes from modal verbs. Adverbs, adjectives and nouns ('certainly', 'essential', 'chance') carry modality too.
- Believing high modality is always better in persuasion. Too much can sound arrogant; sometimes medium modality is more convincing.
- Treating low modality as weak writing. In science, diplomacy and polite requests, it is often the most appropriate choice.
Tips for parents
- Read safety signs and product labels together and rate each statement as high, medium or low modality.
- Practise making a request three ways – bossy, neutral and polite – and talk about how each would be received.
- When your learner argues a point, ask, 'Are you certain, or is it more likely? Choose your modal word to match.'
Go further
- Write two versions of a letter asking a neighbour to keep their dog quiet: one with high modality and one with low. Reflect on which is more effective and why.
- Highlight every modal word in a newspaper opinion piece and explain how the overall modality shapes its tone.
- Write a short science conclusion that uses hedging language appropriately.
About 45 minutes
You'll need
- Exercise book
- Three coloured highlighters (for high, medium and low modality)
- A newspaper opinion piece or a product label from home
Key words
- Modality
- The degree of certainty, obligation or possibility expressed by a writer or speaker.
- Modal verb
- A helping verb that expresses modality, such as must, will, should, would, can, could, may, might.
- High modality
- Language that sounds certain or forceful, such as must, will, always, definitely, certainly.
- Low modality
- Language that sounds tentative or uncertain, such as might, may, could, possibly, perhaps.
- Tentative
- Cautious and not fully certain; leaving room for doubt.
- Hedging
- Deliberately softening a claim with lower modality to avoid overstating it.
Still tricky?
For parents
Want an outside view of where your child is at?
Book a free, no-obligation English and maths assessment at a Success Tutoring centre and get a clear starting point.
Book a free assessmentRelated language lessons
Build up to it (Secondary 1)
Next steps (Secondary 3)