of sb to do 和 for sb to do的区别有一些很难说是指人还是指事情it is selfish of/for him to eat the whole cake.it is selfless of/for the doctor to devote all his time to caring about the patients.这两个如何区分?请各位回答

of sb to do 和 for sb to do的区别有一些很难说是指人还是指事情it is selfish of/for him to eat the whole cake.it is selfless of/for the doctor to devote all his time to caring about the patients.这两个如何区分?请各位回答
of sb to do 和 for sb to do的区别
有一些很难说是指人还是指事情
it is selfish of/for him to eat the whole cake.
it is selfless of/for the doctor to devote all his time to caring about the patients.
这两个如何区分?
请各位回答我举的两个例子。
回答的人都比较蛋疼，没有回答我的两个例子
给后来的人我在发出这个问题后请教老师的正解：
如果一个词既能修饰人又能修饰物，则看你强调的是人还是物。
selfish形容人
并且考察的时候（初中英语）经常是its kind of you，of后面经常跟you
当然只是出题的规律。
至于it is selfless of/for the doctor to devote all his time to caring about the patients.
这个真的是很难辨别，答案是for
但是selfless应该偏向人
但是这个是某地中考题，所以近几年应该不会再出。

of sb to do 和 for sb to do的区别有一些很难说是指人还是指事情it is selfish of/for him to eat the whole cake.it is selfless of/for the doctor to devote all his time to caring about the patients.这两个如何区分?请各位回答
你问的是It's +adj+of/for+to do这种句子
（1）若形容词为描述不定式行为者的性格、品质的,如kind,good,nice,right,wrong,clever,careless,polite,foolish等用of sb.
例如：
It's very king of you to help me.你能帮我真好.
(2)若形容词仅仅是描述事物,不是对行为者的品格进行评价的,如difficult,easy,hard,important,dangerous,possible等用for sb.
例如：
2.It is very important for us to master English.

英语老师帮你解决
这个是形式主语的句型:it's +adj\adv+for \of sb to do sth
用o还是f for取决于前面的adj.形容词或副词指人的性格，品格(kind ,nice,friendly,mean,unfriend,rude ,polite)，方面的用of,其他的用for

it is adj of sb to do，这里的形容词是形容人的性格特征的，如nice，kind clever，foolish，smart，都是形容人的，例句中说It is selfish of him to eat the whole cake,表示他很自私。
it is adj for sb to do就是普通的形容词，如hard，impossible，important；例如：it...

全部展开

it is adj of sb to do，这里的形容词是形容人的性格特征的，如nice，kind clever，foolish，smart，都是形容人的，例句中说It is selfish of him to eat the whole cake,表示他很自私。
it is adj for sb to do就是普通的形容词，如hard，impossible，important；例如：it is important for us to learn English.意思是学英语对我们很重要。

收起

it's后面的形容词如果能反映人的特征就用of，it's kind of you to help you.
否则就用for