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 t

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 t 求it doesn't occur to sb to do sth和it doesn't occur to sb tha occur to和happen to的区别 sth occurred to sb中occur为什么是ed?和时态有什么关系? sth occur to sb什么意思? occur to sb 与it occurs to sb that有什么区别 happen 有 sth happen to sb或者sb happen to do sth 那么occur同样的用法吗 occur to /happen to occur happen的区别 occur to sb. occur,take place,happen,break out有什么区别? occur to sb同意词组