Explain why the expression dudo que takes the subjunctive while no dudo que does not.
The expression "dudo que" (I doubt that) implies uncertainty or doubt, therefore indicating that the speaker does not believe in the truth or certainty of the statement that follows. In such cases, the subjunctive mood is used to indicate doubt or uncertainty about the action or event in the subordinate clause.
On the other hand, "no dudo que" (I don't doubt that) indicates a belief or certainty in the truth or certainty of the statement that follows. As there is no doubt expressed, the indicative mood is used.
In summary, the use of the subjunctive or indicative after "dudo que" or "no dudo que" depends on whether there is any doubt or uncertainty expressed in the sentence.
The expression "dudo que" is used to express doubt or uncertainty about something. When "dudo que" is followed by a verb, it requires the use of the subjunctive mood. This is because the subjunctive is used to express actions or situations that are not yet realized or that are uncertain.
On the other hand, when "no dudo que" is used, it expresses certainty or lack of doubt about something. In this case, it is not necessary to use the subjunctive because the speaker is expressing certainty or belief in the truth of the following statement.
To summarize, "dudo que" requires the use of the subjunctive to express doubt or uncertainty, while "no dudo que" expresses certainty and does not require the subjunctive.