sure that
Você sabe de certeza que aquele era Tom?
Are you sure that was Tom?
Eu tenho absoluta certeza que Tom não sabia que Mary foi fazer aquilo.
I’m absolutely certain that Tom didn’t know Mary went to do that.
Assim, ela tem a certeza que eu não me esqueço dela.
That way, she’s sure I won’t forget her.
— Tabu (2012)
Eu mesmo tinha certeza que ele não queria correr.
I myself was certain that he didn't want to run.
— Senna (2010)
Quero ter a certeza que sabe disso.
I want to make sure you know this.
— O Grupo Baader Meinhof (2008)
Eles têm certeza que são os russos.
They are certain that they are the Russians.
— Alerta Lobo (2019)
Tom tinha certeza que encontraria outro emprego.
Tom was sure he would find another job.