sure,of course,certainly区别是什么?
问题描述：
sure,of course,certainly区别是什么?
答
1. 两者都能用于“be sure/certain + about /of短语”句型中,表示“对（某事）有把握”.主语必须是人,about/of之后多跟名词、代词.如：I am sure/certain of his returning. 我确信他会回来.He is quite sure/certai...