Final answer:
The appropriate verb in the conditional mood is 'dormiría'. The speaker expresses the desire to sleep more but has to wake up early. The complete sentence is 'Yo dormiría más, pero tengo que levantarme temprano'.
Step-by-step explanation:
The appropriate verb in the conditional mood to fill in the blank is dormiría.
When the sentence states 'pero tengo que levantarme temprano', it implies that the speaker would like to sleep more, but they cannot because they have to wake up early. In this context, the conditional mood is used to express a hypothetical situation, indicating that the speaker would sleep more if they could.
For example, the complete sentence would be 'Yo dormiría más, pero tengo que levantarme temprano.'
Learn more about Conditional Mood