Fill in the blanks with must have (if you think it happened), must not have (if you think it didn’t happen) or couldn’t have (if you think it’s impossible).
1. Tigres fans ___________________ been happy, their football club won the derby.
2. I _________________________ left my phone at work; I made a call on the drive home.
3. She __________________ been happy when she heard the good news.
4. He looks upset. He _________________________ liked whatever she just said.
5. - “How was your presentation?” - “Great! It _______________________ been better!”
Respuesta:
1. must have
2. must not have
3. must have
4. must not have
5. must not have (de la cinco no estoy muy segura pero creo que habla de que no le pudo haber ido mejor, por eso puse el not)