一道英语选择,it was helpful___him to solve the case答案是for,为啥不是of,他很乐于助人啊

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一道英语选择,it was helpful___him to solve the case答案是for,为啥不是of,他很乐于助人啊
一道英语选择,
it was helpful___him to solve the case答案是for,为啥不是of,他很乐于助人啊

一道英语选择,it was helpful___him to solve the case答案是for,为啥不是of,他很乐于助人啊
形式主语在英语中通常是it is adj for/of sb to do sth,但是for/of略有区别,如果是for,那么这个it is 后面的形容词修饰的是不定式,比如说it is important for us to protect the environment,保护环境很重要,而不是我们很重要,这很明显important是修饰to protect the environment.如果说用of ,那么那个形容词修饰的是sb,比如说it is nice of you to help him.是你很好,而不是帮助人很好.你那题如果严格来说要用for,因为是他解决了问题很有帮助,而不是他很有帮助.
其实这题出的不怎么好,因为如果你说这个形容词是形容him的其实也说得过去,但是最好还是用for.

for 对于...而言 ,
it was helpful for him to solve the case
这有利于他破案
of 表示某人(物)的特性
It really kind of him to help me
他帮助我令我很感激
他真的很好,帮了我一把
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for 对于...而言 ,
it was helpful for him to solve the case
这有利于他破案
of 表示某人(物)的特性
It really kind of him to help me
他帮助我令我很感激
他真的很好,帮了我一把
~如果你认可我的回答,请及时点击【采纳为满意回答】按钮~
~手机提问者在客户端上评价点“满意”即可~~
~你的采纳是我前进的动力~~~
~如还有新的问题,请另外向我求助,答题不易,敬请谅解~~

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这次是for,因为意思是,这对他破解案子有帮助
一般上是of,不过这次意义不一样一般?可是这次考试,我写的of,是错的要注意意思,of一般上是在形容of之前的人/物体,for一般上是形容for过后的人/物体来我团队吗如果是for,一、念起来不台通顺,二、to solve the case, 有没有注意到,'to'。...

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这次是for,因为意思是,这对他破解案子有帮助
一般上是of,不过这次意义不一样

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用for的意思是这是帮助他解决案例,用of的意思是也是的,所以2个都行

如果用of就是修饰人,it was 后应接修饰人的形容词。
如果用for就是修饰事件,it was后应接修饰事情的形容词。
从句意以及词性可判断,helpful修饰事件,因此用for

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