let sb in能换成let sb inside吗?

能。英语letsbin翻译成中文是让某人进来，英语letsbinside翻译成中文是让某人进去，意思一样，在英语语法中，这两句再表示空间概念的时候就可以互换。

扩展阅读：let sb do 还是 to do ... lets to do还是doing ... let s make a puppet ... let sb do sth ... let sb be done ... lets begin our class ... let s not fall in love ... lets go doing sth ... lets be friends ...