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Modal Verbs: Can, Must, Should
Modal verbs are special verbs that add meaning to the main verb. They do not change form (no -s, no -ed, no -ing).
Can- Ability: I can swim. She can speak three languages.
- Permission: Can I go to the toilet? You can use my pen.
- Negative: can't / cannot. I can't drive.
Must- Obligation: You must wear a uniform at school.
- Strong recommendation: You must see that film -- it's amazing!
- Negative (mustn't): prohibition. You mustn't use your phone in class.
Should- Advice: You should study more. She should see a doctor.
- Negative: shouldn't. You shouldn't eat so much sugar.
Remember
Modal verbs are always followed by the infinitive WITHOUT "to": I can swim (NOT: I can to swim). He must go (NOT: He must to go).
ExampleCompare: "You must do your homework." (obligation - no choice)
"You should do your homework." (advice - it's a good idea)
"You can do your homework now." (permission/ability)
Exercises- Complete with can, must or should: a) You ___ wear a helmet when cycling. b) ___ you play the piano? c) You ___ drink more water.
- Write 3 school rules using must/mustn't.
- Write 3 pieces of advice for a friend who is stressed, using should/shouldn't.
- Write 5 things you can do and 3 things you can't do.
✏️ Actividad de repasoRepasa los conceptos principales de esta lección. Intenta explicar con tus propias palabras lo que has aprendido sobre Can, Must, Should.
- Lee de nuevo las secciones que no hayas entendido bien.
- Escribe un resumen de 3-5 líneas con las ideas principales.
- Si hay ejercicios, intenta resolverlos sin mirar las soluciones.