Explain why the expression dudo que takes the subjunctive while no dudo que does not..

The expression "dudo que" expresses doubt or uncertainty about something and triggers the use of the subjunctive mood in Spanish. The subjunctive is used to convey doubt, possibility, or subjectivity.

On the other hand, when the expression "no dudo que" is used, it expresses certainty or confidence in something, and therefore does not require the use of the subjunctive. The indicative mood is used to express facts or certainties.

In summary, "dudo que" triggers the subjunctive because it expresses doubt or uncertainty, while "no dudo que" does not trigger the subjunctive because it expresses certainty or confidence.

write as a simple paragraphs

The expression "dudo que" is followed by the subjunctive because it indicates doubt or uncertainty about something. In contrast, "no dudo que" is followed by the indicative because it expresses certainty or confidence in a statement. The use of the subjunctive or indicative mood is determined by the level of certainty or doubt conveyed by the speaker in these expressions.