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MODAL VERBS

MODAL VERBS. CHARACTERISTICS They are auxiliary verbs. To form the negative we add not. They have the same form for all the persons. They are followed by the infinitive without to. have to is a semi modal . OBLIGATION. Must Have to (has to). LACK OF OBLIGATION.

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MODAL VERBS

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  1. MODAL VERBS CHARACTERISTICS They are auxiliary verbs. To form the negative we add not. They have the same form for all the persons. They are followed by the infinitive without to. have to is a semi modal.

  2. OBLIGATION • Must • Have to (has to) LACK OF OBLIGATION • Don’t/ doesn’t have to • Needn’t • Don’t need to

  3. ADVICE • Ought to • Should • Shouldn’t • Must PROHIBITION • Can’t • Mustn’t

  4. OBLIGATION AND ADVICE IN THE PAST

  5. ABILITY AND PERMISSION • Can’t/ can’t: • to express ability in the present. • To give permission • Could/ couldn’t: • to express ability in the past. • To express permission in the past. • Be able to: • To express ability in different tenses • In the past tense: manage • Can/ could/ may • To ask permission.

  6. SPECULATION AND DEDUCTION 0% Certainty CAN’T 100% Certainty MUST Probability Could Might May

  7. SPECULATION AND DEDUCTION IN THE PAST

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