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Past modals PET

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  • I'm sure David took your book by mistake. David ...
    must have taken your book by mistake.
  • I'm sure that the government took steps to end the poverty problem in the city. The government ...
    The government must have taken steps to end the poverty problem in the city.
  • I'm sure they haven't eaten all the food. It's not possible! They ...
    can't have eaten all the food.
  • It was unnecessary for you to clean the floor. You ..
    shouldn't have cleaned the floor.
  • Heather possibly hasn't left yet. Heather ..
    may/might not have left yet.
  • I'm certain Jennifer didn't know about the living conditions of her daughter. Jennifer ...
    can't have known about the living conditions of her daughter.
  • I'm sure she didn't feel any sympathy for him. She ...
    can't have felt any sympathy for him.
  • It was wrong of you to shout tothat homeless. You ...
    shouldn't have shouted tothat homeless.
  • I'm sure it was the cat that took the fish from the table. The cat ...
    must have taken the fish from the table.
  • Maybe she was ill on Saturday. She ..
    might/may have been ill on Saturday.
  • The major wanted to pass a law against drugs, but eventually he decided not to pass it. The major ..
    could have passed a law against drugs.
  • It was a mistake to park outside the police station. You ...
    shouldn't have parked outside the police station
  • It's possible that Winston volunteered in the animal shelter, but I'm not sure. Winston
    may/might have volunteered in the animal shelter.
  • Perhaps Pam and Tim decided not to come. Pam and Tim ...
    might have decided not to come.
  • I'm certain that the man committed suicise. The man ...
    must have committed suicide.
  • It was wrong of the head teacher not to support the strike. The head teacher ..
    should have supported the strike.
  • I'm sure that Liz hasn't met Harry before. Liz ..
    can't/couldn't have met Harry before.
  • I'm sure the citizens were really disappointed with the measure. The citizens ...
    must have been really disappointed with the measure.
  • Perhaps your dad went to the demonstration. Your dad ..
    may/might have gone to the demonstration.