be open for sb还是 be open to sb?为什么那为什么我们书上写the swimming pole is open all year round for students who like swimming.

be open for sb还是 be open to sb?为什么那为什么我们书上写the swimming pole is open all year round for students who like swimming. 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 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 be sth for sb be vailable for sb. be true for sb. be down 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还是be good for sb 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?