Modal Meaning Challenge

{"finish":"Challenge complete! You used modal verbs to express obligation, advice, permission, possibility and certainty.","steps":[{"word":"Strong obligation","say":"Pupils must wear their identification cards at all times.","question":"Which verb shows that this is a firm rule?","card":"Pupils ___ wear their identification cards at all times.","choices":["might","must","could"],"answer":1,"good":"Correct! Must expresses a strong obligation or rule.","help":"This is required, not optional."},{"word":"Advice","say":"You should revise a little each day before the examination.","question":"Which verb gives sensible advice?","card":"You ___ revise a little each day before the examination.","choices":["should","must not","may"],"answer":0,"good":"Correct! Should is used to give advice.","help":"The speaker recommends this action but is not making a rule."},{"word":"Possibility","say":"It might rain later, so carry an umbrella.","question":"Which verb shows that rain is possible but not certain?","card":"It ___ rain later, so carry an umbrella.","choices":["must","might","will"],"answer":1,"good":"Correct! Might shows possibility.","help":"The speaker is unsure whether rain will come."},{"word":"Permission","say":"You may use a dictionary during this activity.","question":"Which verb gives permission?","card":"You ___ use a dictionary during this activity.","choices":["may","must","should"],"answer":0,"good":"Correct! May can be used to give permission.","help":"The learner is allowed to use a dictionary."},{"word":"Impossibility","say":"That cannot be the correct total because two items are missing.","question":"Which verb shows that the conclusion is impossible?","card":"That ___ be the correct total because two items are missing.","choices":["might","should","cannot"],"answer":2,"good":"Correct! Cannot shows that something is not possible.","help":"The missing items prove the total is wrong."},{"word":"Past certainty","say":"The office is locked and the lights are off. They must have left.","question":"Which form shows a strong conclusion about the past?","card":"The office is locked and the lights are off. They ___ left.","choices":["might have","must have","should have"],"answer":1,"good":"Correct! Must have expresses a strong deduction about the past.","help":"The evidence makes leaving the most certain explanation."},{"word":"Past possibility","say":"Sarah is not here yet. She might have missed the bus.","question":"Which form shows one possible explanation?","card":"Sarah is not here yet. She ___ missed the bus.","choices":["must have","cannot have","might have"],"answer":2,"good":"Correct! Might have expresses a possibility in the past.","help":"Missing the bus is possible, but we do not know."},{"word":"Past responsibility","say":"You should have submitted the form yesterday.","question":"Which form shows that an expected action was not completed?","card":"You ___ submitted the form yesterday.","choices":["may have","should have","could not have"],"answer":1,"good":"Correct! Should have describes a past responsibility that was not fulfilled.","help":"The form was expected yesterday."},{"word":"Past ability","say":"By the age of ten, Kato could swim across the pool.","question":"Which verb shows an ability in the past?","card":"By the age of ten, Kato ___ swim across the pool.","choices":["could","must","may"],"answer":0,"good":"Correct! Could expresses past ability.","help":"The sentence describes what Kato was able to do."},{"word":"Future certainty","say":"With enough rain and good care, the crops will grow well.","question":"Which verb presents the expected future result?","card":"With enough rain and good care, the crops ___ grow well.","choices":["might","will","could have"],"answer":1,"good":"Correct! Will presents the result as expected in the future.","help":"The conditions support a confident prediction."},{"word":"Polite request","say":"Could you please open the window?","question":"Which verb makes the request polite?","card":"___ you please open the window?","choices":["Must","Could","Shall have"],"answer":1,"good":"Correct! Could makes the request polite.","help":"The speaker is asking courteously."},{"word":"Prohibition","say":"Visitors must not enter the laboratory without permission.","question":"Which form expresses a strict prohibition?","card":"Visitors ___ enter the laboratory without permission.","choices":["do not have to","might not","must not"],"answer":2,"good":"Correct! Must not means the action is forbidden.","help":"Visitors are not allowed to enter."},{"word":"No necessity","say":"You do not have to bring a textbook because copies will be provided.","question":"Which form shows that bringing a textbook is unnecessary?","card":"You ___ bring a textbook because copies will be provided.","choices":["must not","do not have to","should not"],"answer":1,"good":"Correct! Do not have to means there is no need to do something.","help":"The action is allowed, but it is not necessary."},{"word":"Conditional possibility","say":"If the bus arrives early, we may reach town before noon.","question":"Which verb shows a possible result?","card":"If the bus arrives early, we ___ reach town before noon.","choices":["may","must","should have"],"answer":0,"good":"Correct! May expresses a possible future result.","help":"Reaching town early depends on the bus."},{"word":"Recommendation","say":"Because the road is flooded, drivers should use the alternative route.","question":"Which verb gives the most suitable recommendation?","card":"Because the road is flooded, drivers ___ use the alternative route.","choices":["might have","should","cannot"],"answer":1,"good":"Correct! Should gives a sensible recommendation.","help":"The alternative route is the safer choice."}]}