C1 Advanced Academic tone
Modal nuance in argumentation
Lesson goal. After this lesson you can choose modals that match the level of commitment your evidence supports — a core academic skill.
When to use it
- Essays, analyses and formal letters.
- Making recommendations: Schools should consider…
- Raising a possibility: This may explain…
- Keeping claims within the evidence.
Form
| Modal | Commitment | Use when |
|---|---|---|
| no modal (is) | absolute | obvious facts, solid figures |
| must | almost certain | strong inference from clear evidence |
| will | strong prediction | an established trend |
| should | recommendation | proposing an action |
| may / might / could | possible | limited evidence, small sample |
Step by step
- Ask: how strong is my evidence?
- Certain and general → a direct statement is fine.
- Suggestive, small sample, a single study → use may / might / could.
- Recommending rather than concluding → use should.
One idea, three commitments
| Sentence | Commitment | Appropriate when |
|---|---|---|
| Technology destroys jobs. | absolute | rarely true |
| Technology will destroy some jobs. | strong | a clear trend backed by data |
| Technology may destroy some jobs. | cautious | the evidence is still limited |
Examples
These findings may help teachers plan their lessons.
Schools should consider changing the timetable.
Further research may be needed to confirm this.
The data suggest that the trend will continue.
This could explain why the results differ.
Without investment, reforms may fail.
Common mistakes
This research proves that grammar drills always work. → This research suggests that grammar drills can be effective.
One study suggests rather than proves, and always is an unverifiable universal claim.
Everyone knows that technology destroys concentration. → Research suggests that technology may reduce concentration.
Everyone knows is not evidence. Academic writing needs a source and a matching commitment.
Governments must invest more, and this will solve all problems. → Governments should invest more, which may help address these problems.
Using must and will everywhere makes the writing sound dogmatic.
Memory tip
Before each claim, ask: “Can I prove this for every case?” If not, drop one rung on the modal ladder. That is the difference between a B2 and a C1 essay.
Summary
- Modals express the writer's commitment, not just grammar.
- must / will strong · should recommending · may / might / could cautious.
- Choose by the evidence, and limit the scope where needed.
Practise this lesson
Do exercises with an explanation for every question, take mini tests and track your progress on GrammUp.