be helpful to sb.和be helpful for sb.哪个正确？

be helpful to sb.和be helpful for sb.哪个正确？

都正确，都有"有助于"的意思。

1、be helpful to sb ，对…有帮助的岁肆岁

He is always very helpful to his mother.他对他母亲总是很有帮助。

This dictionary is very helpful to your English study.这部词典对你学习英语很有帮助。

2、be helpful for sb，对....有益

Don't throw it, it is helpful for us to repair the bike.别扔了它,它对我们修自行车有乎睁帮助。

It was helpful of you to do that.你那样做真是助人为乐之举。

1、be helpful in doing sth. 对做某事有帮助

例：We hope this leaflet has been helpful in answering your questions.我们希望这个宣传单可以帮助您找到您想要的答案

2、it is helpful (for sb) to do sth 有好处的

例： It is helpful to discuss your problems with your friends.-跟你的朋友们聊聊你遇到的问题是有好处的。

3.be helpful 有帮助的

例：She is intelligent, outgoing and helpful. 她聪明、开朗、乐于雹搜助人。

参考资料：百度百科——helpful