happen to dohappen to be doing happen to have done翻译下,还有没有其他的词语也能这样用,这种用法叫什么名字,再多举些例子

碰巧做 happen to do
碰巧做 happen to be doing
发生已经做 happen to have done
还有例子happen to be 碰巧是
happen to 发生到
happen to coincide 碰巧与

发生这样做
恰巧做
恰巧做