be useful to sb还是for sb?
be rude to sb还是for sb
be important to sb还是for sb
be embarrassing to sb还是for sb?
be useful for sb.对…有好处; be useful to sb.对某人有用;
是be free to sb 还是be free for sb
是be sorry for sb 还是be sorry to sb
be free to sb 还是 be free for sb ..快速..
be important to sb.还是be important for sb.
是be difficult to sb 还是be difficult for sb?
请问be useful for sb是不是短语
be kind to还是for sb
be greatful for sb to sth 还是 be greatful to sb for sth