对有把握的英文是sure。sure的例句He wants to make sure that schools are committed to providing alternative education（他想确保学校尽力提供新型教育）。
sure的例句Even to this day we don\'t know what happened for sure（即使到现在我们也不确定究竟发生了什么）；She was no longer sure how she felt about him（她不再确定自己对他的感觉）。
