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Modal verbs

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1. MODAL VERBS  MAIN FEATURES MODAL VERBS MODAL PERFECT 2. MAIN FEATURES  They are followed directly by the infinitive of another verb (without TO)  They…
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  • 1. MODAL VERBS  MAIN FEATURES MODAL VERBS MODAL PERFECT
  • 2. MAIN FEATURES  They are followed directly by the infinitive of another verb (without TO)  They don’t use an ‘s’ for the third person singular or ‘ed’ for the past  They are never used with other auxiliary verbs. QUESTIONS are formed by inversion. NEGATIVE is formed adding NOT to the verb
  • 3.  TO TALK ABOUT ABILITY: MODAL VERBS CAN/CAN’T COULD/COULDN’T BE ABLE TO/ NOT BE ABLE TO  TO EXPRESS OBLIGATION:HAVE TO/ DON’T HAVE TO NEED TO/ NEEDN’T MUST (not MUSTN’T)  TO EXPRESS PROHIBITION: MUSTN’T CAN’T  TO EXPRESS CERTAINTYMUST  TO EXPRESS POSSIBILITY MAY/ MAY NOT MIGHT/ MIGHT NOT COULD/ COULDN’T  TO GIVE ADVICE TO MAKE SHOULD/ SHOULDN’T OUGHT TO
  • 4. MODAL PERFECT  TO EXPRESS AN ALTERNATIVE PAST ACTION: CAN’T HAVE + PARTICIPLE  TO EXPRESS A CERTAINTY IN THE PAST:MUST HAVE + PARTICIPLE  TO EXPRESS A POSSIBILITY IN THE PAST:MAY/ MIGHT HAVE + PARTICIPLE TO EXPRESS A IMPOSSIBILITY IN THE PAST: COULD HAVE + PARTICIPLE TO SUGGEST A CRITICISM FOR A PAST ACTION:SHOULD HAVE + PARTICIPLE
  • 16532_07a

    Jul 23, 2017

    Parabolas

    Jul 23, 2017
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