She "was sure" that she had left her keys on the table, but they weren't there when she checked again.
doubted
guessed
was positive
I "was certain" that I had locked the door before leaving the house, but I found it unlocked upon returning.
was sure
knew for a fact
guessed
She "shouldn't have" eaten so much dessert before the long car ride.
it wasn't a good idea, but she did it.
it was a good idea, but she didn't do it.
it wasn't allowed, but she did it.
She "didn't have to" attend the meeting.
it was a good idea.
it was necessary.
she had complete choice in the matter.
The detective "suspected" foul play due to the inconsistencies in the witness's statements.
assumed
had a hunch
was certain
She "didn't need to" bring an umbrella.
it was unnecessary.
it was necessary.
it was a good idea.
He "was sure" he had left his phone on the kitchen counter, but after searching, he found it in his jacket pocket.
supposed
had a hunch
was certain
I "had a hunch" that the team would win the game, and indeed, they emerged victorious with a remarkable performance.
doubted
guessed
was positive
After assessing the situation, she "figured" that taking a different approach might solve the problem more effectively.
was sure
doubt
suspected
I "should have" double-checked the train schedule before heading to the station.
it was a good idea, but I didn't do it.
it was required but I didn't do it.
it wasn't a good idea, but I did it.
We "were supposed to" leave for the airport at 9 AM.
it was required but we didn't do it
it wasn't required, but we did it.
it was a good idea, but we didn't do it.
He "needed to" submit the report by noon.
he had no choice.
it was unnecessary.
it was necessary.
I "wasn't supposed to" reveal the surprise party plans.
it was allowed, but I didn't do it.
it wasn't allowed, but I did it.
it was necessary and I did it.
She "had to" attend the meeting despite feeling unwell.
it was a good idea
it was necessary
she had no choice