Answer:
Vamos a jugar fútbol hasta que nosotros estemos cansados.
Explanation:
In this exercise you have to form a sentence with the words in parenthesis hasta que / nosotros / estar cansados. To do that, you have to conjugate the verb "ir" which is an irregular verb and the verb "estar".
So a sentence like the following would be wrong:
- * Ir a jugar fútbol hasta que nosotros estar cansados.
The correct form of both verbs would be the following:
- Vamos a jugar fútbol hasta que nosotros estemos cansados.
In Spanish pronouns are attached to the verb.