"sb.+happen+to do sth."句型中不定式做什么成分?请那位英语同行指教,

sb.happen to do sth. 用happen to do和happen to sb.造句 happen 有 sth happen to sb或者sb happen to do sth 那么occur同样的用法吗? happen to sb 意思 sth.happen to sb. happen to sb 造句 happen to sb.是什么意思? sb happened/happen to do这两个那个对 happen to sb和happen to do sth 造句并解释造的句子 it take sb st to do sth用法意思是什么? It takes sb st to do sth句型造句 It takes sb st to do sth的中文翻译 sth.happen to sb.造句 occur to /happen toit occur to sb.to do sth ...与it occur to sb that从句..有何区别..it happen to do sth 与it happen to that 从句..有何区别 初一词组总结.（比如 tell st to do sth,bring sb to sp之类的0 sb.+happen+to do sth.句型中不定式做什么成分? happen to do or happen doing? It take sb st/sm to do sth 的关联 性质 用法等大神们帮帮忙