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The flight must had been cancel (not certain)
The flight might have been canceled.
Oops!
Okay!
She may has missed the early train. (almost certain)
She must have missed the early train.
Oops!
Okay!
Dinner at your aunt’s house was good (very certain)
Dinner at your aunt’s house had to have been good.
Oops!
Okay!
Your sweater must have find after we left the restaurant. (not certain)
Your sweater might have been found after we left the restaurant.
Oops!
Okay!
We didn't invited to the party. (almost certain)
We must not have been invited to the party.
Oops!
Okay!
Someone had to have been forget to lock the door. (almost)
Someone must have forgotten to lock the door.
Oops!
Okay!
Their ships could destroy in a huge storm. (not certain)
Their ships could have been destroyed in a huge storm.
Oops!
Okay!
They may not have been the first Europeans to visit North America. (very certain)
They couldn't have been the first Europeans to visit North America.
Oops!
Okay!
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