make sure 确信；证实
for sure adv. 确实；毫无疑问地
sure of 确信…
sure enough 果然，果真
are you sure 你肯定吗；你确定要…
sure about 肯定；对…确信 not so sure 不太确定
as sure as 千真万确地；和…一样肯定无疑
be sure of oneself v. 自信；有自信心
make sure of 确定；确保；尽力做到
pretty sure 相当肯定
that's for sure 那是肯定 be sure to do 一定做某事；确定做
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