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.
Obligation
Uso di 'have to'
Have 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
Proibizioni con 'mustn't'
Mustn't means it is prohibited.
You mustn't waste your money
No obligation
Assenza di obbligo con 'don't have to'
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)
You should start early. (it's a good idea)
You shouldn't stay late. (it isn't a good idea)
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