不定式的完成式

* He seems to have caught a cold. 他好像感冒了。
* I happened to have come across the book once. 我碰巧有一次见过这本书。
* There was a lot of fun at yesterday's party．You ought to have come，but why didn't you? 昨天的聚会很好玩。你应该来的，为什么没来呢？
* It was a great satisfaction to have revisited our native village. 重访了家乡是非常愉快的事。
* I hoped to have seen you yesterday，but I didn't have time． 昨天我本来想去看你，但没有空。
* I regret to have been the cause of all this trouble. 我很抱歉引起了这么多麻烦。
* You are lucky to have got tickets to the concert. 你运气好弄到了音乐会的票。
* I am very pleased to have been of help. 能够帮得上忙我很高兴。
* He is said to have written a new book about workers． 据说他又写了一本关于工人的书。
* The enemy was reported to have surrendered. 据报道敌人投降了。