از 10 عبارت زیر برای اظهار یقین در مورد انجام کاری در زیان انگلیسی میتوانیم استفاده کنیم :
I'm quite sure...I'm absolutely positive...I'm fairly / quite certain...It must be right.I know...It's definitely...You can be sure...I've no doubt at all that...I'm a hundred percent certain that...I'm (utterly) convinced...