Concetti Chiave
- MUST is used to express an obligation or a rule that must be followed, with its negative form being Mustn't.
- SHOULD is used for giving advice, meaning "dovresti," with the negative form being Shouldn't.
- HAVE TO conveys necessity, and changes to HAS TO for third person singular; it also has negative and past forms.
- Examples of MUST include prohibitions like "In this room you mustn't smoke" and mandatory actions like "You must follow all the rules."
- Examples of SHOULD include advice like "You should sleep almost eight hours a night" and recommendations on behavior.
Must, should, have to
Innanzitutto, MUST vuol dire "devi" e si utilizza quando devi esprimere un obbligo o una legge che devi rispettare per forza; la forma negativa di questo è Mustn't.
Alcuni esempi di frasi con must:
- In this room you mustn't smoke
- In this bar you must pay before eating
- During the exams you mustn't use your phone
- If you have eaten, you must wait two hours before go into the pool
- You mustn't use your phone in the classroom
- You must follow all the rules
Poi, c'è SHOULD, questo lo devi utilizzare quando vuoi dare un consiglio, infatti il suo significato sarebbe "dovresti", e la forma negativa è Shouldn't.
Alcuni esempi di frasi con should:
- You should sleep almost eight hours a night
- You should help your classmates if they need
- You shouldn't drop everything in the same bin, you should recycle
- You shouldn't joke too much your friends
- You shouldn't speak while you are eating
- You should wash your hands when they aren't clean
L'ultimo, HAVE TO ha il significato di "è neccesario che" e quando la persona è la terza singolare devi usare HAS TO; di questo esiste sempre la forma negativa (don't have to/doesn't have to) e in più, la forma passata affermativa (had to) e quella negativa (didn't have to).
Alcuni esempi di frasi con have to:
- I have to do my homework before dinner
- You have to go bed not too late , if you don't want to be tired
- You haven't to speak during the lessons because you disturb
- You have to brush your teeth two times a day and after eating
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