Concetti Chiave
- "Have to" is used for rules and laws, indicating an external obligation.
- "Must" expresses an obligation from the speaker's perspective, without using "to" after it.
- "Mustn't" signifies prohibition, indicating something is not allowed.
- "Don't have to" indicates there is no obligation, giving a choice to the person.
- "Should" and "shouldn't" offer recommendations, suggesting what is or isn't a good idea.
MODALS OF OBLIGATION AND PROHIBITION
ObligationHave to is often used for rules.
You have to work hard. (it's a law) (Dovere, non obbligatorio)
Must is often used when the obligation comes from the speaker. Must is never followed by to.
I must remember it. (I think this) (Obbligo, devo assolutamente ricordarmi)
Prohibition
Mustn't means it is prohibited.
You mustn't waste your money
No obligation
Don't have to means you have a choice.
You don't have to eat the food on an aeroplane(it's not necessary but you can if you want to)
Recommendation
You should start early. (it's a good idea)
You shouldn't stay late. (it isn't a good idea)
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