be useful for sb. 与be useful to sb. 区别是什么？

Question

如题所述

Answer 1

要区分be useful for somebody和be useful to somebody的不同，关键就是要知道介词for和to后接名词时的意义和作用以及具体句型：

1 for: after some adjective, noun, and verb phrases, you use for to introduce the subject of the action indicated by the following infinitive verb用于形容词、名词和动词短语后，引出其后动词不定式的主语

❶ be useful for somebody常用于下面句型：
It is useful for somebody to do something对某人干某事是有用的
It is very useful for a person to know how to swim.对一个人来说会游泳是很有用的。
It may be useful for us to consider the data separately.把数据分别进行考虑对我们来说是有用的。

Something be useful for somebody who…对于某种类型的人来说某物是有用的
The slow cooker is very useful for people who go out all day.慢炖锅对于整天都不在家的人来说很有用。

❷ be useful for something/for doing something对于某事/干某事是有用的
Television is useful for making up your mind how to vote.电视对你决定如何投票是很有用的。
These plants are particularly useful for brightening up shady areas.这些植物对于照亮阴暗的区域特别有用。
The research may be useful for applications in medicine and biotechnology.这项研究可能对于在医药和生物技术的应用方面很有用。

2 to: used to say what or who an action, attitude, situation etc. affects or is related to用来表明行动、态度、情况等影响或关系到某事物或某人，针对，对于
be useful to somebody针对某人有用(句子的主语可以是人或物)
He might be useful to us.他也许对我们有用。
This information may be useful to the enemy.这条消息可能对敌人有用。

Answer 2

be useful for sb.对…有好处; 用于形容词、名词和动词短语后，引出其后动词不定式的主语

be useful to sb.对某人有用;针对某人有用(句子的主语可以是人或物)

例句：

It is useful for somebody to do something对某人干某事是有用的

It is very useful for a person to know how to swim.对一个人来说会游泳是很有用的。

It may be useful for us to consider the data separately.把数据分别进行考虑对我们来说是有用的。

Something be useful for somebody who…对于某种类型的人来说某物是有用的

The slow cooker is very useful for people who go out all day.慢炖锅对于整天都不

He might be useful to us.他也许对我们有用。

This information may be useful to the enemy.这条消息可能对敌人有用。

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