Inglés
UNIT 5: MODAL VERBS
MODAL VERBS
• Ability: can/can’t, could/couldn’t, be able to
• Obligation: must, have to
• Necessity: have to, need to
• Prohibition: mustn’t, can’t
• No obligation: don’t have to, needn’t
• Certainty: must (affirmative), can’t (negative)
• Possibility: might/might not, may/may not, could
• Advice: should/shouldn't, ought to
MODAL PERFECTS (PAST FORM)
• Subject + Modal + Have + Past participle
• Must, can’t/couldn’t (certainty), could (it could have happened, but it didn’t), may/may not, might/might
not, should/shouldn’t, would (it would have happened, but it didn’t), needn’t
1
UNIT 5: MODAL VERBS
MODAL VERBS
• Ability: can/can’t, could/couldn’t, be able to
• Obligation: must, have to
• Necessity: have to, need to
• Prohibition: mustn’t, can’t
• No obligation: don’t have to, needn’t
• Certainty: must (affirmative), can’t (negative)
• Possibility: might/might not, may/may not, could
• Advice: should/shouldn't, ought to
MODAL PERFECTS (PAST FORM)
• Subject + Modal + Have + Past participle
• Must, can’t/couldn’t (certainty), could (it could have happened, but it didn’t), may/may not, might/might
not, should/shouldn’t, would (it would have happened, but it didn’t), needn’t
1
