be helpful to还是for好像是be helpful to那有be help 怎么好多人说是be helpful to 还有 把问题回答全 ok？

对某人有用是be helpful to sb.还是be helpful for sb? be helpful to还是for好像是be helpful to那有be help 怎么好多人说是be helpful to 还有 把问题回答全 ok？ be helpful in be helpful to be helpful for 三者区别即怎么用 一个英语问题：是They are helpful for me还是They are helpful to me 对什么有帮助 是be help for 还是be helpful for 作文Be helpful to others Be helpful to others急! 有没有be helpful（for sb） to do这个短语 The title can be helpful for you to understang a text.要人工翻译、 Try asking yourself what you'd do if your goal were to be helpful rather than efficient.if your goal were to be helpful rather than efficient.were to be helpful 这个结构是被动语态么?还是别的什么. be helpful to do为什么不对 有没有be helpful to sb i like to be a helpful Sleeping less can be helpful _____ you,because you are fat.A for B to C with D by （如果把helpful换成healthy,选哪个? be late for还是be late to be eager to 还是be eager for Be early to.还是 be early for when you meet a new word,it's helpful to ______in your dictionarylook for it 还是look it for