"be left for sb to

be left for sb to be useful to sb还是for sb? be embarrassing to sb还是for sb? be important to sb还是for sb be rude to sb还是for sb be important to sb.还是be important for sb.区别? 是be difficult to sb 还是be difficult for sb? be adj to sb 与be adj for sb 区别 be free to sb 还是 be free for sb ..快速.. be free to sb还是be free for sb 是be free to sb 还是be free for sb 什么时候be+形容词+for sb,什么时候be+形容词+to sb sb be left to do有这个搭配吗 There is no time left for sb to do sb be to blame for sth例句 be good for sb to do to be fit for sb.什么意思 英文语法：be sorry toor sb?是be sorry to sb还是be sorry for sb?