1.) dijo, dice 2.) dices, dijiste 3.) dijimos, decimos
The correct word to fill the blank and complete the sentence is, pudieron.
• Ustedes no pudieron ir al concierto anoche. ¿Por qué?
Answer:
"usted" is the more formal way to speak to an adult or someone older than you in Spanish while "tu" can be used when you're speaking to someone like a friend and that you have a chill and laid back connection with.
Explanation: