163.-Diferencias entre must not y don’t have to. First Certificate
BE CAREFUL. THERE IS A DIFFERENCE IN MEANING BETWEEN MUSTN'T AND DON’T HAVE TO | ||
Mustn't It is prohibited. It is not allowed. It is important that you do NOT do something.
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Don't have to There is no obligation. You are not required to do something, especially if you don't want to. |
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Negative Obligation | Absence of Obligation | |
You must not drink that | You don't have to drink that. | |
= It is forbidden to drink that. = Don't drink that, it is not allowed. = It is important that you do NOT drink that. | = You don't need to drink that but = you can if you want to =There is no obligation to drink that. You decide if you want to.
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You mustn't tell John | You don't have to tell John. | |
= Do NOT tell John. = You are not allowed to tell John. . | = You can tell John if you want to but it is not necessary. | |
She mustn't come. | She doesn't have to come. | |
= It is important that she does NOT come | = She is not required to come but she can if she wants to. | |
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