"discover yourself"和"discovered yourself"差别

Help yourself 和 Help yourselves的差别,举个例子 帮我写一个英语作文,题目：Discover yourself discover for yourself怎么翻译,为什么要加个for for yourself 和 by yourself 的区别 by yourself和yourself的区别 Keep Yourself to Yourself. yourself和yourselves的区别 yourself和yourselves 用法区别? believe yourself和believe in yourself有什么区别 do it by yourself和do it yourself think for yourself 和think by yourself 的区别```` make yourself 和help yourself 有没有区别,怎么用?