Modal verbs: Obligation

Modal verbs: Obligation

Published on 12 April 2021
Transcript
00:01
Modal verbs Obligation
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Modal verbs - Obligation
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Pour exprimer l'obligation, on peut utiliser: have to + infinitif must + infinitif should + infinitif
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Present
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A) Have to
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Forte obligation (venant de l'extérieur)
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Ex: Children have to go to school.
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B) Don't have to = don't need to = needn't
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Absence de nécessité, absence d'obligation (pas besoin de)
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Ex: I don't have to work on Sundays.
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C) Must
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Forte obligation (probablement venant de la personne qui parle)
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Ex: I must study today.
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D) mustn't
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Interdiction
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Ex: You mustn't smoke here.
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E) Should, ought to
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obligation légère, conseil, ="devrait)
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Ex: You should save some money.
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F) Shouldn't
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ne devrait pas
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Ex: You shouldn't smoke so much.
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Past
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A) had to
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obligation in the past (must n'est pas utilisé pour le passé)
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Ex: I had to wear a school uniform when I was a child.
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B) didn't have to
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no obligation
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Ex: We didn't have to go to school on Saturdays.
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C) Should + have + past participle
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une action passée qui n'a pas eu lieu: le conseil / le regret est trop tard.
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Ex: You should have gone to be earlier, now you've missed the train.
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D) Shouldn't + have + past participle
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le conseil / le regret est trop tard.
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Ex: You shouldn't have taken the job, it was a bad idea.