Final answer:
The correct verb conjugation to complete the sentence 'Tú estudiar a las ocho de la noche' is 'empiezas'.
Step-by-step explanation:
The correct verb conjugation to complete the sentence 'Tú estudiar a las ocho de la noche' is 'empiezas'.
In Spanish, the verb 'estudiar' means 'to study' and the subject pronoun 'tú' corresponds to the second person singular, which requires the conjugation 'empiezas'.
For example, 'Tú empiezas a estudiar a las ocho de la noche' means 'You start studying at eight in the evening.'
Learn more about Spanish verb conjugation