I`m what I am与I`m who I am

I`m what I am与I`m who I am
听过张国荣唱的一首歌吗 叫 《我》
里面第一句 I am what I am 这句从语法的角度来说正确吗?
有一天做英语题的时候正好问 I am ___ I am

I am what I am
I am my own special creation
So come take a look
Give me the hook
Or the ovation
It's my world
That I want to have a little pride
My world
And it's not a place I have to hide in
Life's not worth a dam
Till I can say
I am what I am
I am what I am
I don't want praise I don't want pity
I bang my own drum
Some think it's noise I think it's pretty
And so what if I love each sparkle and each bangle
Why not see things from a different angle
Your life is a shame
Till you can shout out I am what I am
I am what I am
And what I am needs no excuses
I deal my own deck
Sometimes the aces sometimes the deuces
It's one life and there's no return and no deposit
One life so it's time to open up your closet
Life's not worth a dam till you can shout out
I am what I am
I am what I am
I am what I am
And what I am needs no excuses
I deal my own deck sometimes the aces sometimes the deuces
It's one life and there's no return and no deposit
One life so it's time to open up your closet
Life's not worth a dam till you can shout out
I am what I am
I am I am I am good
I am I am I am strong
I am I am I am worthy
I am I am I belong
I am
I am
Who whoooo etc.
I am
I am I am I am useful
I am I am I am true
I am I am somebody
I am as good as you
Yes I am
这是另外一首英文歌的歌词,也用了这句话,楼主可以再看看张国荣的《我》的国语和粤语歌词,体会一下这两者的区别.
我们从学校里学到的语法就像字典里看到的词语解释一样,是语言学家总结出的,换言之,先有语言的使用,后根据这些使用总结出语法.而学校里学的只是语法最根基的东西,什么是根基以为的语法呢,其实就是规则之外的例外.
这个地方,需要跟宾语从句（或者用中式语法说,表语从句）,这一点,who和what都可以,问题是,what能不能引导表示“人”的从句?那么你看一下这三个歌词,“最荣幸是谁都是造物者的光荣”,“神造世人 种种色色都有他公允”“我是甚么 是万世沙砾当中一颗.石头大这么多 感激天生这个我”“我就是我 是颜色不一样的烟火,天空开阔 要做最坚强的泡沫”,还有上面的“I am my own special creation ”这些歌词都超越了“人”作为社会人的身份,而着重于他们天地之间一个独一无二的个体,这样的思想.
张国荣的《我》是他给林夕的命题作文,开头第一句必须是‘I am what I am’,这句话在英语使用中其实很常见,英文中也有修辞,明喻暗喻等等,各种说法未必符合你在学校学的语法,学习英语最王道的方法,其实不是去深究语法东西,因为你会发现,只要是一个约定俗成的说法,语法书上肯定会为它做出解释,去背这些“例外”是舍本求末.正确的方法是,你看一个英语是母语的人（布什这种除外）,他这么说了,你也可以这么说,这样不断积累.