his name's on the tip of my tongue!
他的名字就在我嘴边（可就是想不起）!
it was on the tip of his tongue to ask what was the matter.
他差一点就要开口问出了什么事。
See main entry:tip
英汉双解词典包含131075条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。