itis useful （ to for) us to learn english well用哪个

itis useful （ to for) us to learn english well用哪个 be useful to和be useful for的区别 be useful to和be useful for的区别? be useful to sb还是for sb? 分别用diffcult important necessary造句,结构itis adj for sb to do sth iam glad to hear you.itis good to ask for help when you are not sure what to do. 是be useful for 还是be useful to?对……有用的 _____(encyclopaedia) are important for us to find useful information. For the students,it's useful to do more_____.(read) then we need you to help with sports for english speaking students itis relaxing and easy求翻译 Itis naughty to fret什么意思 一首英文歌男人唱的开始是itis wo wo wo itis.（忘了） to.（,）.itis wo wo wo itis （）.to（ What is useful for us to know according to the passage 翻译 itis not common for there _ problems of communication between the old and the young.a,being b to be选b,为什么选A 不对 Thank you very much for helping me.Itis a __________ and,itis,good,for,us的中文意思 very useful for giving workshops? be useful for=什么?