what does he look like?与how does he look like?的区别

'what does he look like?'标准用法，地球人都知道是询问某人长相的意思.
回答：
He has straight hair.

关于'how does he look like?'需要好好分析一下语法结构。

一，He looks like a soldier的问句--->
"he looks like what"--->
What does he look like?

二，He looks like his father的问句--->
"he looks like who"---->
Who does he look like?

三，He looks well. He looks sick.的问句--->
"he looks how"---->
How does he look?

所以从‘三’的可以看出由于he looks like sick不是标准英语，所以'how does he look like?'也不是标准的英语。

所以我认为，‘how does he look like?’是不地道的英语。
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再补充一下：
A person "looks like" something or someone.
或者
A person "looks" somehow .
但
A person can't "look like" somehow.

what does he look like?一般问长啥样。
He has a big face,with a long beard.
how does he look like? 一般问穿这件衣服看起来如何
Oh, great! That T-shirt suits him very well.

前者问相貌，后者问身体状况。

前句的回答一般要具体说出他长相的特征，而后句只需评论出他长得好坏与否即可