A negative statement after the "que" in a sentence that begins with a positive opinion phrase

Hola Gerald R

In Spanish, the correct sentence is "Creo que Juan no tiene el libro." This is because the verb "creer" in the affirmative form expresses a belief or certainty. When "creer" is used affirmatively, the verb that follows "que" must be in the indicative mood, even if the second part of the sentence contains a negative statement like "no tiene el libro."

For example:

However, if "creer" is used in the negative form ("No creo que..."), it implies doubt or uncertainty. In this case, the verb that follows "que" must be in the subjunctive mood.

For example:

In summary, the affirmative form of "creer" uses the indicative mood, while its negative form requires the subjunctive. This distinction helps convey the speaker’s level of certainty or doubt.

Saludos

Silvia