Visitor rules
Classify required, prohibited, allowed and recommended actions.
TF30 · B1 Grammar · 30 min
Modal Passive for Rules, Requirements, and Possibilities
Explain what is required, prohibited, recommended, allowed or possible while keeping the affected action in focus.
Why this lesson matters · เหตุผลที่เรียนบทนี้
For learners: Explain policy points with modal passive forms, distinguish five modal meanings, and clarify a rule whose strength or required action is unclear.
For teachers: The route starts with intended modal meaning, builds modal + be + past participle, compares active ownership with passive policy focus, repairs ambiguity, tests transfer through two accents and ends with an independent eight-point policy briefing plus focused retry.
สำหรับผู้เรียน: อธิบายประเด็นนโยบายด้วย Modal Passive แยกความหมายของ modal ห้าระดับ และทำให้กฎที่ระดับความเข้มหรือการกระทำไม่ชัดเจนเข้าใจได้
สำหรับครู: ลำดับเริ่มจากความหมายของ modal ที่ต้องการ สร้าง modal + be + past participle เปรียบเทียบการเน้นผู้รับผิดชอบแบบ active กับการเน้นนโยบายแบบ passive แก้ความคลุมเครือ ฟังสองสำเนียง และจบด้วยการสรุปนโยบายแปดข้ออย่างอิสระพร้อมแก้จุดเดียวแล้วลองใหม่
Your Goal
Explain eight policy points with modal + be + past participle, distinguish five modal meanings and repair one rule whose strength or action is unclear.
คำอธิบายภาษาไทย
อธิบายกฎ ข้อกำหนด คำแนะนำ สิ่งที่อนุญาต และความเป็นไปได้ด้วย modal + be + past participle โดยเลือกระดับความหมายให้ตรงเจตนา และแก้กฎที่คลุมเครือให้ผู้ฟังรู้ว่าต้องทำอะไร
Why this lesson matters
Policies usually focus on an action or affected item rather than the person who enforces it. Modal meaning shows strength; passive form keeps the policy action in focus.
ภาษาไทย: กฎและนโยบายมักเน้นสิ่งที่ต้องทำหรือสิ่งที่ได้รับผล มากกว่าผู้บังคับใช้ Modal บอกระดับความหมาย ส่วน Passive ช่วยเน้นการกระทำของนโยบาย
PROGRESS FOCUS What improves today?
MEAN · MeaningDistinguish required, prohibited, recommended, allowed and possible actions without overstating strength.
FORM · FormControl modal + be + past participle and keep the modal as the meaning carrier.
USE · Real useDeliver an eight-point briefing, resolve one unclear rule and agree one next action.
Your 30-minute route
1 · 4 minChoose modal meaning
2 · 4 minBuild modal passive
3 · 5 minFocus and repair
4 · 5 minMap eight policy points
5 · 5 minListen and challenge
6 · 7 minBrief, score and retry
Teacher Lesson Plan
Ask “Is this required, prohibited, recommended, allowed or only possible?” before building the passive form. The modal carries policy strength; do not let passive grammar hide a meaning error.
| Stage | Teacher move | Evidence to collect |
|---|---|---|
| 1 · Meaning | Classify policy strength before displaying modal-passive forms. | Ten meaning decisions |
| 2 · Form | Build modal + be + participle and keep modal strength stable. | Eight accurate forms |
| 3 · Focus | Contrast active ownership with passive policy focus and repair ambiguity. | Six focus/repair decisions |
| 4 · Plan | Map action, modal meaning, reason and clarification need. | One eight-point policy map |
| 5 · Check | Use two accents to classify meanings and challenge one unclear rule. | Two listening maps + first briefing |
| 6 · Perform | Score the first briefing, target one meaning/form/use weakness and retry it. | Independent eight-point briefing |
Stage 1 · Choose the modal meaning
Decide the intended policy strength before choosing a modal or building the passive.
STUDENT TASK
POLICY PURPOSEWhat action or affected item is the rule about?
MODAL MEANINGIs it required, prohibited, recommended, allowed or possible?
LISTENER EFFECTWhat will the listener believe or do because of this strength?
| Policy intention | Meaning | Useful modal |
|---|---|---|
| Every visitor has to show identification. | required | must |
| Food is not permitted in the laboratory. | prohibited | must not / cannot |
| Using a helmet is good advice. | recommended | should |
| Guests have permission to use this room. | allowed | can / may |
| The date is one possible option. | possible | may / might / could |
| Registration is not necessary before Friday. | not required | does not have to be / need not be |
- Classify the six examples, then create four more policy intentions.
- Underline the word or phrase that proves the intended strength.
- Explain the difference between must not and does not have to, and between must and should.
Meaning contrast: “Badges must not be shared” prohibits sharing. “Badges do not have to be returned today” removes a requirement.
Finish evidenceTen modal-meaning decisions and two spoken contrasts.
Teacher Help · Stage 1
Keep forms hidden until meaning decisions are complete. Use a five-point meaning line: required → recommended → allowed → possible, with prohibited treated separately. Check especially that learners do not interpret “does not have to” as prohibition.
Stage 2 · Build the modal passive
Keep the modal as the meaning carrier and build the passive action with be + past participle.
STUDENT TASK
| Purpose | Core form | Example |
|---|---|---|
| Requirement | subject + must + be + past participle | Visitor badges must be displayed. |
| Prohibition | subject + must not + be + past participle | Safety doors must not be blocked. |
| Recommendation | subject + should + be + past participle | Equipment should be checked before use. |
| Permission / possibility | subject + can/may/might/could + be + past participle | The meeting may be moved online. |
The modal-passive form rule
Use modal + be + past participle. Keep all three parts: “must be displayed”, not “must displayed” or “must be display”. The modal changes meaning; be + participle creates passive focus.
- Build eight policy points across the five target meanings.
- Include one prohibition and one “not required” meaning without confusing them.
- Underline each modal, box be and circle every past participle.
- Say which word carries the policy strength in each sentence.
Check three common repairs
“Badges must be displayed.” · “The door must not be blocked.” · “The date may be changed.”
Finish evidenceEight accurate modal-passive policy points covering all five meanings.
Teacher Help · Stage 2
Correct in layers: intended strength, modal, be, then participle. Keep a short policy-participle bank visible: displayed, checked, stored, shared, moved, booked, worn and reported.
Stage 3 · Focus the policy and repair ambiguity
Choose active ownership or passive policy focus, then repair missing form and misleading modal strength.
STUDENT TASK
| Message | Decision | Reason or repair |
|---|---|---|
| Visitor badges must be displayed. | passive policy focus | the required action matters, not the enforcer |
| Reception must check every visitor badge. | active ownership | the responsible team matters |
| Equipment must checked before use. | repair form | must be checked |
| This door must not be block. | repair form | must not be blocked |
| The room should be booked. The booking is compulsory. | repair strength | use must be booked |
| The form does not have to be shared. | clarify meaning | not required, or prohibited? ask |
Check the focus and repairs
Use passive when the policy action is central and active when ownership is central. Repair 3 to “must be checked”, 4 to “must not be blocked” and 5 to “must be booked”. Ask whether 6 means not required or not allowed.
Ambiguity test: Can the listener tell both the action and its exact strength? If either is unclear, ask before rewriting.
- Make all six focus or repair decisions.
- Explain why the first two messages use different voice choices.
- Repair the three inaccurate or misleading modal-passive messages.
- Ask one clarification question before deciding how to rewrite message 6.
Finish evidenceSix focus/repair decisions, three accurate repairs and one clarification question.
Teacher Help · Stage 3
Do not treat passive as automatically more formal or better. Ask whether the listener needs the policy action or the responsible person first. For ambiguity, protect the original intended strength until the learner has asked a clarification question.
Stage 4 · Map a balanced policy briefing
Plan eight points by affected action, modal meaning, reason and one clarification need.
STUDENT TASK
1 · ACTIONWhat item or action is the policy about?
2 · MEANING + REASONWhat strength is intended and why?
3 · CHECK + ACTIONWhat needs clarification and what will people do next?
| Policy area | Meaning and modal-passive note | Reason or clarification |
|---|---|---|
| Visitor access | required · badges must be displayed | identity check at entrance |
| Safety equipment | recommended · case should be checked | reduce setup problems |
| Shared rooms | allowed · room can be booked after 3 | time slot is available |
| Event date | possible · date might be changed | ask who confirms and when |
- Choose one real or realistic workplace, event, school or shared-space policy.
- Plan exactly eight points: action · meaning · modal passive · reason.
- Use all five meanings and include both prohibition and not-required meanings accurately.
- Mark one unclear point that a listener should challenge and circle one agreed next action.
Finish evidenceOne eight-point policy map, all five meanings, one clarification need and one next action.
Teacher Help · Stage 4
Keep notes short so Stage 6 is spoken, not read. Require a real reason for strong rules. Balance the briefing so it does not sound like eight prohibitions, and preserve one genuine clarification need for Stage 5.
Stage 5 · Listen, classify and challenge
Recover each policy action and modal meaning, then challenge one rule whose strength or application is unclear.
STUDENT TASK
American English
British English
Event options
Identify permission, recommendation and two levels of possibility.
- Listen once for context. On the second listen, note action · modal · meaning · reason.
- Classify every policy point you hear and retell one set from each recording.
- Give your planned eight-point briefing to a partner.
- Your partner challenges one rule: “Is that required, recommended, allowed or only possible?”
- Clarify the intended strength, repair the rule if needed and agree one next action.
Useful challenge frame“When you say ___ may be ___, is that permission or possibility?” · “Do you mean it must not be done, or it does not have to be done?”
Finish evidenceTwo listening maps, one first eight-point briefing, one challenge, one clarified rule and one agreed action.
Teacher Help · Stage 5
Audio never starts automatically. Use the American recording first and the British recording for transfer. If a learner catches the action but loses the strength, replay only the modal phrase and require a meaning label before showing any transcript or model.
Stage 6 · Final Practice: brief, clarify and retry
Deliver an independent eight-point policy briefing and improve one precise meaning, form or listener-response weakness.
FINAL PRACTICE
Set meaning → brief → challenge → agree → retry
- Use notes only: action · meaning · modal passive · reason · clarification.
- Brief exactly eight policy points in 75–100 seconds.
- Use all five meanings: required, prohibited, recommended, allowed and possible.
- Keep modal + be + past participle complete and accurate.
- Your partner challenges one unclear rule; clarify it and agree one next action.
- After one feedback target, retry only the weakest modal choice, passive form, ambiguity repair or action agreement.
Planning example: visitor badge · required · must be displayed · identity check · confirm whether temporary badges are included.
Score the first independent performance
MEAN · MeaningThe listener can distinguish all five modal meanings, including prohibition versus not required and requirement versus recommendation.
FORM · FormThe learner controls modal + be + past participle across all eight policy points.
USE · Real useThe briefing explains reasons, resolves one unclear rule and produces one agreed next action.
0 · Not yetModal strength, passive action or listener response is unclear, so the policy cannot be followed reliably.
1 · With supportThe briefing becomes clear after a meaning contrast, missing-be cue, participle cue or clarification prompt.
2 · IndependentModal meaning, passive form, ambiguity repair and agreed action are clear without a prompt.
Result: 0–2 Rebuild · 3–4 Developing · 5–6 B1 mastery evidence.
Finish evidenceFirst eight-point policy briefing + all five meanings + one clarification exchange + one agreed action + one focused retry.
Teacher Help · Stage 6
Score the first independent briefing across MEAN, FORM and USE. Give one target only: “restore the intended strength”, “add be”, “repair the participle”, “separate prohibition from not required” or “make the agreed action specific”. Keep the original score and record whether the retry improves it.
Grammar you can use
You can now explain rules, requirements, recommendations, permissions and possibilities with accurate modal-passive forms, challenge ambiguity and agree a practical next action. Use the Dynamic Learning Graph below for the next step.
Return to the Learning LibraryContinue your learning path
Modal Verbs for Obligation and Permission
Secure active modal meanings for obligation, prohibition, choice and permission before changing information focus.
วางระบบความหมายของ modal แบบ active สำหรับหน้าที่ ข้อห้าม ทางเลือก และการอนุญาตก่อนเปลี่ยนจุดโฟกัส
Active or Passive: Choose the Focus
Decide whether a message should foreground the actor or the affected action and item.
ตัดสินใจว่าข้อความควรเน้นผู้กระทำหรือการกระทำและสิ่งที่ได้รับผล
Understand a Safety Warning
Apply modal passive rules while interpreting a practical safety warning.
ใช้ Modal Passive ขณะตีความคำเตือนด้านความปลอดภัยจริง
Passive Reporting Structures
Extend policy focus to neutral passive reporting structures at B2.
ต่อยอดการเน้นนโยบายไปสู่ Passive Reporting ที่เป็นกลางในระดับ B2
