Final answer:
The correct verb form to fill in the blank in the sentence 'Tú y yo el baño' is 'limpiamos'.
Step-by-step explanation:
The correct verb form to fill in the blank in the sentence 'Tú y yo el baño' is 'limpiamos'. The subject 'Tú y yo' is the first and second person plural which requires the verb form 'limpiamos' to agree with it in number and person. Examples of its usage include 'Tú y yo limpiamos el baño todos los días' which means 'You and I clean the bathroom every day'.
Learn more about Verb forms in Spanish