Final answer:
The correct form of 'estar' in the present tense for 'Tú _____ lejos de casa, ¿no?' is 'estás'.
Step-by-step explanation:
The correct form of estar in the present tense to fill in the blank for the given sentence "Tú _____ lejos de casa, ¿no?" is estás. Estar is an irregular verb in Spanish, hence its present tense conjugation doesn't follow the regular patterns. Depending on the subject, the present tense forms of estar are: yo estoy, tú estás, él/ella/usted está, nosotros estamos, vosotros estáis, ellos/ellas/ustedes están.