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Classroom talk includes “You must be tired” and “You must hand in the project by Friday.” Mark the CORRECT distinction between the two meanings of must.
Must expresses ability in both sentences, and meaning shifts because be tired refers to a state while hand in refers to an action that learners can perform.
Must expresses a strong suggestion in both sentences, and context changes tone, so the first reads as advice and the second as encouragement to meet a goal.
Must expresses future intention in both sentences, and the difference comes from time reference, so be tired signals a plan and hand in signals a scheduled event.
Must expresses probability in both sentences, and the second uses it to predict compliance, which frames the deadline as an inference rather than a requirement.
Must signals an inference with high certainty in the first sentence and an obligation tied to a rule or requirement in the second sentence, even with identical form.