occur与happen的区别是什么?

happen与occur的区别是什么? occur与happen的区别是什么? occur happen的区别 happen,take place与occur 的区别 英语单词：happen与occur有什么区别? Occur与happen有何区别? occur的用法?和happen.take place 的区别 happen,take place,come about,occur的区别 happen to 与happen to have done 的区别是什么? 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. 请问occur 和happen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 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 occur,happen,take place,hold的区别请问这些短语的区别 occur和happen的差别在哪里 take place 与 happen的用法和区别是什么? what happen与what happens的区别是什么?