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MODAL VERBS

Learn what modal verbs are, how they work with other verbs, and their rules for use. Explore differences between must, can, should, and more. Understand obligations and permissions in English.

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MODAL VERBS

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  1. MODAL VERBS • MODALS OF OBLIGATION

  2. What are MODAL VERBS? • HE MUST TOMORROW • They are auxiliary verbs, they go with other verbs

  3. What are MODAL VERBS? • HE CAN WILL MEET YOU • 2 modals verbs cannot go together • HE MUST TO MEET YOU TOMORROW • Followed by infinitive without “to”, except modal verb HAVE TO.

  4. What are MODAL VERBS? • HE CANS MEET YOU • Don’t have 3rd person “-s” • LAST YEAR I CANNED • Don’t have endings like -ed, -ing, etc

  5. What are MODAL VERBS? • DO CAN YOU MEET ?) I DON’T CAN MEET • Don’t use do/does in questions/ negatives, but use inversion in questions and “NOT” after the modal

  6. OTHER TENSES • MUST: past & future with HAVE TO • When I was young, we had to wear a uniform at school • Next year you will have to study harder

  7. MUST & HAVE TO • I must finish my homework before 8 • We have to start work at 9 am • They are both used to express that something is necessary

  8. MUST • I must find a hotel to stay at tonight (“I have to find a hotel” is also possible) • The speaker decides that something is necessary (INTERNAL decision)

  9. HAVE TO • I have to wear a uniform • Somebody else has made the decision, it’s not the speaker’s opinion (EXTERNAL decision)

  10. MUSTN’T & DON’T HAVE TO • Very different meanings in negative: • You mustn’t open the door • You don’t have to open the door

  11. MUSTN’T • You mustn’t open the door. Lately there have been many robberies in the neighbourhood. • (It’s forbidden /prohibited)

  12. DON’T HAVE TO • You don’t have to open the door. I have the keys. • (It’s not necessary)

  13. SHOULD / SHOULDN’T • I think you should see the doctor • I think you shouldn’t watch so much TV • Give an opinion about what’s the best thing do do. • Not as strong as MUST /HAVE TO: • You must see the doctor • You have to see the doctor (You have no alternative)

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