(1) You may take whatever(=anything/everything that)you like.

     你喜欢什么就拿什么。

(2) You may take whichever(=any) seat you like.

     你想坐哪个位置就坐哪个位置。

(3) Whoever(=Anyone who) cuts the trees down must be punished.

     任何一个砍树的人都必须受到惩罚。

(4) You may give the note to whomever(=anyone whom) you meet at the office.

     你可以把条子给你在办公室看到的任何一个人。