Your English writing platform
Discover LudwigThe phrase "knew for sure" is grammatically correct and can be used in written English.
It is used to express a strong and confident belief or understanding about something. Example: "Despite her doubts, she knew for sure that she would ace the exam because she had studied hard and was well prepared."
Exact(55)
No one knew for sure.
I wish I knew for sure.
He added: "I never knew for sure.
Until now, no one knew for sure.
The baseball parts he knew for sure.
"I never knew for sure.
Similar(5)
Who knows for sure?
Nobody knows for sure.
I cannot know for sure.
We never know for sure.
Only Mayweather knows for sure.
Write better and faster with AI suggestions while staying true to your unique style.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com