Occur与happen有何区别?

Occur与happen有何区别? 英语单词：happen与occur有什么区别? 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 happen,take place与occur 的区别 happen与occur的区别是什么? occur与happen的区别是什么? 请问occur 和happen有什么区别 occur happen的区别 occur,take place,happen,break out有什么区别? occur to和happen to的区别我们常见:It happen to sb.那么,It occur to sb和上面的那句有什么区别呢?请具体给我occur和happen的用法 happen,take place,come about,occur的区别 求happen、occur、take place 三者区别,要具体. occur的用法?和happen.take place 的区别 come about,occur to,bring in与happen的区别及意义尽量答的详细一点,急 happen to 与 occur to 的具体意思,以及两者的区别是什么?意思有以下选择：occur to 1）发生在...身上2）想起,想到...happen to 1）发生在...身上2）碰巧...那一个才是对的?请给出例句. occur和happen到底有什么区别啊?老师说sth occur to sb是某人发生了某事,又说it occur to sb是某人突然想到某事,还是分不清, happens与happen有什么区别 求比较英语同义短语用法Happen.occur.come about.Take place四个都有发生的意思,具体用法有何不同?