为什么许多英文歌里都有let sb go的句型

为什么许多英文歌里都有let sb go的句型李俊基——《Never say goodbye》 █don't you let me go---------Ashley Parker Angel——《Let You Go》 █you said forever,that you would never let me go---------莎拉布的慢——《i will be with you》█Leave and let me go---------you.not meant for me,I know以前还听过好多有let sb go 的句型,一时想不起来了.