Almost Certain (Must have / Must not have)
Complete the sentence with a past modal because you are almost certain: "Juan's phone is off and he is hiking in Tayrona Park. He ______ have lost his signal."
Must
Complete the sentence to show possibility: "Your keys aren't on the table. You ______ have left them inside the taxi."
might / may / could
Complete the sentence: "Carlos doesn't even know how to drive. He ______ have taken your car to Villa de Leyva."
couldn't
Complete the sentence for a negative certainty: "The bakery on the corner is completely dark and locked. They ______ have opened yet."
Must no
Complete the sentence for a negative possibility: "Camila didn't buy the concert tickets in Bogotá. She ______ not have had enough money."
might / may
Complete the sentence: "The restaurant was completely booked for months. You ______ have gotten a table without a reservation."
couldn't
Fix the grammatical error: "She must has forgotten her umbrella because she arrived completely soaked from the Bogotá rain."
"...She must have forgotten..." (Always use 'have' after a modal verb in the past)
Correct the mistake: "They could have went to Medellin for the flower festival."
"...They could have gone to Medellin..." (Use the past participle form of the verb)
Turn this active guess into a logical impossibility statement using the verb 'see': "Diego was in Cali all day yesterday, so it is impossible that you saw him in Cartagena."
"You couldn't have seen Diego in Cartagena yesterday."