‘What time does the show start?’ ‘I’m not sure.’
“表演什么时候开始?”“我说不准。”
My mother, I felt sure , had not met him before.
我敢肯定我妈妈以前从未见过他。
adj. 确信的;可靠的;必定的
confident、
responsible、
honest、
reliable、
tried
adv. 当然;的确
certainly、
definitely、
indeed