PRESENT SIMPLE
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AFIRMATIVE
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MUST
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OBLIGACIÓN
AUTOIMPUESTA
‘I must study everyday’
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HAVE TO
HAS TO
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NOS LO IMPONEN
‘I have to pass exams to get my degree’
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NEGATIVE
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MUSTN’T
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PROHIBITION
‘You mustn’t giggle in class”
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Don’t / doesn’t have to
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= needn’t
No es necesario
‘We don’t have to get up early on Sunday’
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