no debes nadar

Keith, no debes nadar allí solo, ¿está claro?
Keith, you're not to swim out there alone, is that clear?
Recuerda que no debes nadar.
Remember, you can't go swimming.
No debes nadar en la laguna.
You mustn't swim in the pond.
No debes nadar en ese lago. Es peligroso.
You shouldn't swim in that lake. It's dangerous.
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