happen to 的意思有哪些和词性都是什么

发生,碰巧,正巧,偶然
这是个词组,哪来的词性
1.
How could this happen to me!
我怎么会遇到这种事啊!
2.
We happen to hold the same view.
我们两人的想法不谋而合.
3.
It could happen to anybody.
这种事谁都难免.
4.
Do you happen to know his new telephone number?
你可知道他的新电话号码?
5.
It's ok.that can happen to the best of us.
没有关系.谁都会发生这种事.
6.
I happen to have the official statistics with me.
我碰巧身边有官方的统计数字.
7.
Should you happen to see him,please give him my regards.
如果你碰巧见到他,请代我向他致意.
8.
It can happen to anyone.
这事可能发生在任何人身上.