anyone who = whoever
whomever 是 whoever的宾格,无论谁
eg:
Go with the flow and enjoy your time with whomever you are with but don't make promises or expect them in return.
跟着潮流走吧,和在一起的朋友尽情玩乐,但是不要做出任何许诺,也不要期待什么回报.
anyone who 在从句里面做主语.
whomever在从句里面只能做宾语.