He "can't have" finished the entire project in just one day.
uncertain
very certain
I "bet" she'll finish the marathon in under four hours
not certain
certain
She "could have" completed the marathon.
very certain
uncertain
She "must not have" heard the announcement.
very certain
uncertain
He "must have" forgotten his keys.
very certain
uncertain
He "might not have" realized that the meeting was rescheduled.
uncertain
very certain
They "were sure" they had followed all the instructions precisely,
not certain
certain
She "must have" forgotten about the dentist appointment.
uncertain
very certain
I "suppose" we could try the new restaurant downtown for dinner tonight.
not certain
certain
She "assumed" the meeting time had changed.
certain
not certain
After analyzing the clues, she "figured" that the missing keys might be in the coat pocket.
not certain
certain
She "may have" left her phone at the office.
uncertain
very certain
He "couldn't have" known about the surprise party.
uncertain
very certain
He "knew for a fact" that the store closed at 9 p.m.
certain
not certain
She "guessed" the answer to the riddle.
not certain
certain
She "had a hunch" that the surprise party was for her.
not certain
certain
He "might have" forgotten to send the important email.
very certain
uncertain
She "doubted" the authenticity of the information presented.
certain
not certain
She "may not have" received the invitation yet.
very certain
uncertain
She "was positive" that her meticulous planning would lead to a successful outcome for the event.
certain
not certain