be good for sb是主谓宾还是主系表be good for sb是主谓宾结构还是主系表? for sb. 这部分在句子中作什么成分?

be good for sb是主谓宾还是主系表be good for sb是主谓宾结构还是主系表? for sb. 这部分在句子中作什么成分? be good for sb to do还是be good for sb do 是be difficult to sb 还是be difficult for sb? 是be free to sb 还是be free for sb 是be good for health 还是be good for healthy 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 英文语法：be sorry toor sb?是be sorry to sb还是be sorry for sb? be good for sb to do 是be against for sb/sth还是be against sb/sth?请陈述理由. 是be sorry for sb 还是be sorry to sb我对不起某人 应该用哪个? 对某人有用是be helpful to sb.还是be helpful for sb? 英语翻译是be important to sb.还是be important for sb. 到底是be harmful to sb.还是be harmful for sb.求用法 是be rude of sb还是be rude for sb,另外说下它的意思 be important to sb.还是be important for sb.区别?