对某人有用是be helpful to sb.还是be helpful for sb?

对某人有用是be helpful to sb.还是be helpful for sb? 某物对某人有用,能用be used to be helpful to sb 对某人有帮助的 be friendly to sb to后接人称代词时,是不是都要接宾格呀? 作文Be helpful to others Be helpful to others急! 是be useful for 还是be useful to?对……有用的 be nice to sb 对某人友好 be helpful in be helpful to be helpful for 三者区别即怎么用 be useful for sb.对…有好处; be useful to sb.对某人有用;这二者的区别就只在“好处”和“有用”?还是根本就可以等同? 翻译：这里有一些对学生有用的建议Here are some ___ ___ ___ helpful to students 对什么有帮助 是be help for 还是be helpful for be helpful to do为什么不对 有没有be helpful to sb i like to be a helpful 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 others 这个搭配对吗?刚刚考试完,书面表达最后一句我写的是Everyone should be helpful to others like Tom, be unfamiliar to和be unfamiliar with的区别 如果某人对某人不熟悉咋说 对某人诚实be honest 后接with or to