any用于肯定句通常句中有情态动词can，或will表示一种可能性，其实还是不确切的语境，即非肯定。例如，我们可以说：Any person can do it. 但我们不说：Any person did it. 可以说I could/will give it to anyone.但不说：I gave it to anyone. 总之，any是非肯定词，要用于非肯定的语境。

With a name like yours, you could be almost any shape．

语法中的any是代词，限定词（不知有没有这个功能）后加名词，any 才能用在否定吗，他其它词性有没有这种功能，例如 any 作副词功能时等。

any当任何来讲的时候，也可以用于肯定句, any当一些讲时，与some同义，但是要用于疑问句，否定句，条件状语从句。

（any用于肯定句）任一的，每一的 

(英文解释:You use any in positive statements when you are referring to someone or something of a particular kind that might exist, occur, or be involved in a situation, when their exact identity or nature is not important.)

Any actor will tell you that it is easier to perform than to be themselves.  

每一个演员都会告诉你演戏比做自己容易。

I'm prepared to take any advice. 

我愿意接受任何忠告。