Answer:
No están seguros de que Pedro pueda dejar de fumar.
No es evidente que estés agotado.
No creo que las medicinas naturales son curativas.
No es verdad que la cirujana quiera operarte.
Es seguro que este médico conoce el mejor tratamiento.
Explanation:
They are not sure that Pedro can quit smoking.
It is not obvious that you are exhausted.
I do not believe that natural medicines are curative.
It is not true that the surgeon wants to have surgery.
It is certain that this doctor knows the best treatment.
The opposite sentence of the given sentences is:
To elaborate the requested sentences correctly, it must be identified that the negative sentences are in the subjunctive form since there is no certainty that said actions occur or not.
However, when they are written in the affirmative form, the conjugation used must be present, because in that case there is already a certainty that the events actually occur.
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