had happened to him信息详情
发生在他身上
had happened───已经发生过（happen的过去完成时）
happened to───碰巧
had to───不得不，必须（haveto和hasto的过去式）
happened to sb───某事发生在某人身上；碰巧发生在某人身上
to him───对他来说
happened───vi.发生（happen的过去式及过去分词）
happened to do───偶然，碰巧
happened to be───碰巧是；恰巧是
we had to───我们不得不这么做
I neither knew nor cared what had happened to him.───我既不知道也不关心他出了什么事。
He acted out all that had happened to him.───他活灵活现地表演出他所遇到的事情。
Who had last seen the explorer? What had happened to him?───谁最后一次见到那位探险家？他发生了什么事？
Pinocchio then told his father all the things that had happened to him in these two years.───皮诺奇把这两年所发生的事情全都讲给爸爸听。
She felt that something had happened to him, but he said nothing to his sister of his love.───她预感到他发生了什么事情，但他对公爵小姐玛丽亚没有谈到任何爱情问题。
For a year, I waited to hear what had happened to him.───一年来，我一直在等着听他的消息。
He drew a long face all day yesterday, and I have no idea what had happened to him.───昨天他一整天都拉长了脸，我不知道他怎么了。
He rested flat upon his chest for a space, wondering where he was and what had happened to him.───他俯卧休息片刻，心想自己是在什么地方，刚才发生了什么事情。
He lay down on the couch and tried to go to sleep, so as to forget all that had happened to him, but he could not do so.───他半躺半卧地倚靠在长沙发上想睡一觉，好忘掉他所发生的事情，但是他却办不到。
Compared to all that it had happened to him recently, this latest crisis seemed fairly small beer.
After eating and putting on the warm clothes, the angel began to explain to the sheepherder what had happened to him.
I neither knew nor cared what had happened to him.
I knew intuitively that something dreadful had happened to him.