为什么对身体好是be good for,而对身体不好是be bad to

be bad for \u548c be good for \u662f\u4ec0\u4e48\u610f\u601d

be bad for\u5bf9\u2026\u4e0d\u5229\uff1b\u5bf9\u2026\u6709\u5bb3 Smoking is bad for your health. \u5438\u70df\u6709\u5bb3\u5065\u5eb7\u3002
be good for\u6709\u76ca\u4e8e\uff1b\u5bf9\u2026\u6709\u597d\u5904 Drinking much water is good for girls. \u591a\u559d\u6c34\u5bf9\u5973\u5b69\u5b50\u5f88\u597d\u3002

be good for \u662f \u5bf9\u2026\u2026\u6709\u76ca
be bad for \u662f \u5bf9\u2026\u2026\u6709\u5bb3

be good for 后接人，为范指，而be bad to后接具体部位，为具体。

是这样的，这是有两个不同的词组，
一个用be,一个用do
be good/bad for your health
do good/bad to your health

bad to the bone坏到骨子里
Reading in the sun is bad for your eyes .
Eating too much for super is bad for health .
都可以用for

对身体不好~一般用 be harm for .
身体好是be good for

看看这句话
Internet content filters may be bad for one's health

用for后面加名词
to后面加动词原形吧

扩展阅读：golang为什么不建议学 ... be good to的基本用法 ... be good to的三种用法 ... be good后面都能接什么 ... be good to用法区别 ... be good with和at区别 ... begoodto和for的区别 ... begood系列短语 ... go语言为什么不建议学 ...