happen 后边跟to do为什么不是to doing?happen为不及物动词 to应该是介词所以我认为应该是to

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/23 10:51:14

happen 后边跟to do为什么不是to doing?happen为不及物动词 to应该是介词所以我认为应该是to doing
happen为不及物动词 to应该是介词所以我认为应该是happen to doing

1 sth happens to sb.-----某人发生了某件事An accident happened to him 他出事了---to是介词
2 sb.happens to do sth（碰巧- - -- ）.----- 如：I happen to know him.----我碰巧认识他-----to是动词不定式的连接词

happen to do or happen doing? happen to do和happen to be doing happen to do和happen to be doing 的区别? happen to do sth 中 happen 是不及物动词,为什么还能加不定式做宾语? happen to do sth happen to 有没有happen to doing? 4,happen to do sth Do you happen to know____? Do you happen to know ( )? sb.happen to do sth. happen to 未发生 happen to be doing 正在发生 happen to h