STANAG & JFLT Level 3 Grammar
Modal Verbs
Structured progression training. Complete each activity to master this grammar point.
Task Progress
Grammar Reference
Modal verbs are a precision toolkit. At Level 3, the examiner does not just check that you used a modal. The examiner checks which modal you chose and whether its strength matches your claim. Using only WILL and MUST throughout a TIEAC essay signals Level 2 register. Range and precision of modal choice is one of the clearest differentiators at this level.
| Modal | Function in formal writing | Example |
|---|---|---|
| may | Formal possibility, cautious claim | This approach may prove effective in certain contexts. |
| might | Lower possibility, more tentative than may | Stricter enforcement might reduce incidents over time. |
| could | Possibility, polite suggestion, distancing | It could be argued that the policy has failed. |
| should | Recommendation, logical expectation | Funding should be increased to reflect current demands. |
| ought to | Moral or logical obligation (formal) | Governments ought to prioritise personnel welfare. |
| would | Conditional outcome, polite framing | A more balanced approach would yield better results. |
| must | Strong necessity, obligation, or certain deduction | The operation must have been planned well in advance. |
| cannot | Negative deduction: impossible given evidence | The report cannot be accurate given the timeline. |
| will | Certainty, formal prediction | Failure to act will result in long-term consequences. |
| need to | Practical necessity | Reform needs to be accompanied by resourcing. |
| Deduction Modal | Certainty | Example |
|---|---|---|
| must have been | Almost certain (positive) | The decision must have been made before the briefing. |
| cannot have been | Almost certain (negative) | The figure cannot have been correct at the time. |
| may have been | Formal tentative possibility | The delay may have been caused by supply issues. |
| might have been | Tentative possibility | A third party might have been involved. |
| could have been | One of several explanations | The breakdown could have been avoided with better planning. |
EXAM TIP: A Level 3 essay that uses only WILL and MUST throughout is operating at Level 2. The range and precision of your modal use is one of the clearest markers of level. Match each modal to the exact strength of your claim: certain (will/must), recommended (should/ought to), possible (may/might), conditional (would), deduced (must have/cannot have).
COMMON MODAL ERRORS AT LEVEL 3
must TO + verb → must + base verb (no TO): must complete, not must to complete
ought + verb → ought TO + base verb: ought to prioritise, not ought prioritise
would TO + verb → would + base verb: would produce, not would to produce
might has been → might HAVE been: might have been, not might has been
should revised → should BE revised: passive modal needs BE
ought + verb → ought TO + base verb: ought to prioritise, not ought prioritise
would TO + verb → would + base verb: would produce, not would to produce
might has been → might HAVE been: might have been, not might has been
should revised → should BE revised: passive modal needs BE
Task A of 9
Gap Fill: Choose the Correct Modal
Precision of modal choice is the tested skill. Register, certainty, and function all matter.
Instructions. Complete each sentence with the most appropriate modal from the word bank. Consider register, degree of certainty, and communicative function. More than one answer may be possible in some cases, but choose the most precise option for the context given.
Word Bank: may / might / could / should / ought to / would / must / cannot / will / need to
Task A of 9
Task B of 9
Sentence Construction: Modal and Context
Write formal sentences using the specified modal. Register and strength of claim must match.
Instructions. Write a complete formal sentence using the modal given and the context indicated. The modal is specified for a reason: match its strength precisely to the context. A wrong modal choice will be penalised at Level 3 even if the rest of the sentence is correct.
Task B of 9
Task C of 9
Matching: Modal to Function
Match each sentence to the precise communicative function the modal performs.
Instructions. Match each sentence (1 to 10) to its correct function (A to J). At Level 3, modal verbs are chosen deliberately to signal the writer’s stance, certainty, and purpose. Write the letter in the answer box.
Task C of 9
Task D of 9
Transformation: Adjust the Strength
Rewrite each sentence using the modal specified. Notice how strength and register shift.
Instructions. Rewrite each sentence using the modal or instruction given. The meaning must remain logical but the strength of claim changes. This is a core Level 3 writing skill: the ability to calibrate certainty precisely through modal choice.
Task D of 9
Task E of 9
Error Correction
Modal form errors penalised at Level 3. Find and correct each one precisely.
Instructions. Each sentence contains ONE error relating to modal form, structure, or word order. These are the exact errors penalised in Level 3 written examinations. Write the corrected sentence in full. One sentence is correct. Identify it and state why.
Task E of 9
Task F of 9
Find the Grammar: Modal Analysis
Identify modals across essay and intelligence contexts. State function and strength of each.
Instructions. Read each passage. Identify every modal verb. For each, state: (1) the modal, (2) its function (deduction / recommendation / hedging / prediction / obligation), and (3) the strength of claim (certain / probable / possible / tentative).
Passage 1 — TIEAC Essay Conclusion
In conclusion, it could be argued that discipline, while essential, must be understood as one component within a broader framework of effective military organisation. Leadership quality ought to be given equal weight in any reform agenda. Greater investment in personnel development should be prioritised over the next planning cycle. If current trends continue, capability shortfalls will become increasingly difficult to address. A more holistic approach might prove the most effective long-term solution.
could (could be argued) — Academic hedging / polite distancing. Strength: tentative. Opens a position without full authorial commitment; standard TIEAC register for introducing a claim.
must (must be understood) — Logical necessity / obligation. Strength: certain. Asserts that the conclusion is inescapable given the argument presented. Strong register signal.
ought to (ought to be given) — Formal recommendation / moral obligation. Strength: strong but formal. Signals that the recommendation is not merely preferable but logically required.
should (should be prioritised) — Recommendation. Strength: strong. Standard Level 3 recommendation modal; less absolute than must, more directive than could.
will (will become) — Certain prediction. Strength: certain. Used to state a consequence as inevitable if the condition is met. High-confidence claim.
might (might prove) — Tentative possibility. Strength: tentative. Softens the conclusion deliberately; signals that the writer is not overstating the claim.
must (must be understood) — Logical necessity / obligation. Strength: certain. Asserts that the conclusion is inescapable given the argument presented. Strong register signal.
ought to (ought to be given) — Formal recommendation / moral obligation. Strength: strong but formal. Signals that the recommendation is not merely preferable but logically required.
should (should be prioritised) — Recommendation. Strength: strong. Standard Level 3 recommendation modal; less absolute than must, more directive than could.
will (will become) — Certain prediction. Strength: certain. Used to state a consequence as inevitable if the condition is met. High-confidence claim.
might (might prove) — Tentative possibility. Strength: tentative. Softens the conclusion deliberately; signals that the writer is not overstating the claim.
Passage 2 — Intelligence Summary Extract
The pattern of communication intercepts must suggest a degree of coordination that cannot be attributed to coincidence. The timing of the incidents may indicate advance planning, though this cannot be confirmed without further evidence. It might be that a third party was involved in the initial stages. The scale of the operation could not have been achieved without significant logistical support. Further analysis must be conducted before any formal conclusion can be reached.
must suggest — Strong positive deduction. Strength: near-certain. The weight of evidence compels this inference; the writer treats it as unavoidable given the pattern.
cannot (cannot be attributed) — Negative deduction. Strength: certain. Rules out an explanation definitively based on available evidence.
may indicate — Formal tentative deduction. Strength: possible. Signals a plausible inference that requires further evidence to confirm.
cannot (cannot be confirmed) — Negative certainty. Strength: certain. The absence of evidence makes confirmation impossible at this point.
might (might be) — Tentative possibility. Strength: tentative. The weakest deduction in the passage; signals a speculative inference not yet supported by evidence.
could not have been — Past negative deduction. Strength: near-certain. Rules out the possibility that the operation was achieved without logistical support. Past modal structure: could + not + have + past participle.
must (must be conducted) — Obligation / procedural necessity. Strength: certain. States a required action before a conclusion is permitted.
cannot (cannot be attributed) — Negative deduction. Strength: certain. Rules out an explanation definitively based on available evidence.
may indicate — Formal tentative deduction. Strength: possible. Signals a plausible inference that requires further evidence to confirm.
cannot (cannot be confirmed) — Negative certainty. Strength: certain. The absence of evidence makes confirmation impossible at this point.
might (might be) — Tentative possibility. Strength: tentative. The weakest deduction in the passage; signals a speculative inference not yet supported by evidence.
could not have been — Past negative deduction. Strength: near-certain. Rules out the possibility that the operation was achieved without logistical support. Past modal structure: could + not + have + past participle.
must (must be conducted) — Obligation / procedural necessity. Strength: certain. States a required action before a conclusion is permitted.
Task F of 9
Task G of 9
Controlled Writing: TIEAC Conclusion Paragraph
Write a formal conclusion using at least five different modals deliberately chosen.
Instructions. Write a TIEAC conclusion paragraph (80 to 100 words) for the essay topic below. You must use at least FIVE different modal verbs. Each modal must be chosen deliberately to match the function required. Underline each modal you use. Formal register. No contractions.
Essay Topic and Task
- Topic: Strict discipline is the single most important factor in building an effective military unit.
- Your position: Discipline is essential but not sufficient alone. Leadership and unit cohesion are equally important.
- Restate your position using modals to qualify it appropriately
- Make one recommendation using should or ought to
- Make one prediction using will or may
- End with a conditional claim using would
Words: 0 / 80–100
Model Answer:
In conclusion, it could be argued that discipline, while essential to operational effectiveness, cannot alone produce a high-performing military unit. Leadership quality and unit cohesion must be treated as equally fundamental components of any reform agenda. Decision-makers ought to therefore resist framing this as an either-or question. If reform programmes continue to prioritise discipline over leadership development, capability shortfalls will persist at the unit level. A more integrated approach, one that gives equal weight to both factors, would produce significantly stronger and more sustainable outcomes.
(approx. 93 words | Modals used: could [hedging], cannot [negative deduction], must [obligation], ought to [formal recommendation], will [prediction], would [conditional outcome])
In conclusion, it could be argued that discipline, while essential to operational effectiveness, cannot alone produce a high-performing military unit. Leadership quality and unit cohesion must be treated as equally fundamental components of any reform agenda. Decision-makers ought to therefore resist framing this as an either-or question. If reform programmes continue to prioritise discipline over leadership development, capability shortfalls will persist at the unit level. A more integrated approach, one that gives equal weight to both factors, would produce significantly stronger and more sustainable outcomes.
(approx. 93 words | Modals used: could [hedging], cannot [negative deduction], must [obligation], ought to [formal recommendation], will [prediction], would [conditional outcome])
Task G of 9
Task G2 of 9
Extended Writing: Deduction from Intelligence Evidence
Use modals of deduction to analyse evidence without stating unconfirmed facts.
Instructions. Read the source information below. Write a formal analytical paragraph (90 to 110 words) commenting on what the evidence suggests. Use at least FOUR modals of deduction (must, cannot, might, may, could). Do not state anything as a direct fact unless the source text confirms it. Formal impersonal register throughout.
Source Information
Three separate incidents occurred within a 48-hour period at different locations. Each incident followed a similar operational pattern. No group has claimed responsibility. Local sources report that the individuals involved were not previously known to authorities. Communication intercepts from the preceding week show unusual levels of encrypted activity.
Words: 0 / 90–110
Model Answer:
The occurrence of three incidents within a 48-hour period, each following a similar operational pattern, must suggest a degree of coordination that cannot be attributed to coincidence. The involvement of individuals not previously known to authorities may indicate that a cell structure was in place prior to the incidents, though this cannot be confirmed without further investigation. The elevated levels of encrypted communication in the preceding week could suggest advance planning at an organisational level. A third party might have provided logistical or operational support, though no direct evidence of this has yet been established.
(approx. 105 words | Modals: must suggest [strong deduction], cannot [negative certainty x2], may indicate [formal possibility], could suggest [tentative deduction], might [speculative inference])
The occurrence of three incidents within a 48-hour period, each following a similar operational pattern, must suggest a degree of coordination that cannot be attributed to coincidence. The involvement of individuals not previously known to authorities may indicate that a cell structure was in place prior to the incidents, though this cannot be confirmed without further investigation. The elevated levels of encrypted communication in the preceding week could suggest advance planning at an organisational level. A third party might have provided logistical or operational support, though no direct evidence of this has yet been established.
(approx. 105 words | Modals: must suggest [strong deduction], cannot [negative certainty x2], may indicate [formal possibility], could suggest [tentative deduction], might [speculative inference])
Task G2 of 9
Task H of 9
Exam Challenge Task
Formal recommendation report section addressed to a commanding officer — examiner standard.
Instructions. Write a formal recommendation report section (130 to 150 words) addressed to a commanding officer. Your section must: (1) identify two problems using modals of deduction to describe what the evidence suggests, (2) make three formal recommendations using a range of advisory modals (should, ought to, could, need to), and (3) end with a qualified prediction using will or may. Use at least six different modal verbs in total. Formal impersonal register. No contractions.
Exam Requirements
- Section 1: two problems identified using deduction modals (must suggest / may indicate / could mean)
- Section 2: three recommendations using should / ought to / could / need to (vary them)
- Section 3: qualified prediction using will or may to close
- Minimum six different modal verbs in total
- Formal, impersonal, addressed to commanding officer
Words: 0 / 130–150
Model Answer:
The current retention figures must suggest that existing incentive structures are no longer aligned with the expectations of junior personnel. The pattern of early departures from specialist roles may indicate that training investment is not being matched by adequate career development pathways.
In light of these findings, the following recommendations are submitted for consideration. The personnel welfare framework should be reviewed as a matter of priority, with particular attention to the mid-career retention period. A structured mentoring programme ought to be introduced at unit level to provide clearer progression guidance. Additionally, flexible deployment options could be piloted across two volunteer units to assess their impact on retention. Specialist roles need to be accompanied by transparent promotion criteria that are consistently communicated and applied.
If these measures are implemented in full, retention rates will improve within two planning cycles. Failure to act may result in capability gaps that prove significantly more costly to address at a later stage.
(approx. 142 words | Six modals: must suggest [deduction], may indicate [tentative deduction], should [recommendation], ought to [formal obligation], could [polite suggestion], need to [practical necessity], will [certain prediction], may [qualified prediction])
The current retention figures must suggest that existing incentive structures are no longer aligned with the expectations of junior personnel. The pattern of early departures from specialist roles may indicate that training investment is not being matched by adequate career development pathways.
In light of these findings, the following recommendations are submitted for consideration. The personnel welfare framework should be reviewed as a matter of priority, with particular attention to the mid-career retention period. A structured mentoring programme ought to be introduced at unit level to provide clearer progression guidance. Additionally, flexible deployment options could be piloted across two volunteer units to assess their impact on retention. Specialist roles need to be accompanied by transparent promotion criteria that are consistently communicated and applied.
If these measures are implemented in full, retention rates will improve within two planning cycles. Failure to act may result in capability gaps that prove significantly more costly to address at a later stage.
(approx. 142 words | Six modals: must suggest [deduction], may indicate [tentative deduction], should [recommendation], ought to [formal obligation], could [polite suggestion], need to [practical necessity], will [certain prediction], may [qualified prediction])
Task H of 9