英语语法：不定式完成式的用法

　　(1) 表⽰发⽣在谓语动作之前的动作：

　　He seems to have caught a cold. 他似乎感冒了。

　　I hate to have quarreled with her. 我后悔和她吵架了。

　　I believe it to have been a mistake. 我相信这是⼀个错误。

　　You appear to have travelled quite a lot. 你似乎作过多次旅⾏。

　　I’m sorry to have given you so much trouble. 对不起给了你这么多⿇烦。

　　It’s said to have been built in the Ming dynasty. 据说它是明朝修建的。

　　(2) 表⽰在某个给定的时间之前已完成的动作：

　　I hope to have finished the work by now. 我希望现在以前已完成这项⼯作。

　　(3) 表⽰过去未曾实现的想法和愿望：

　　I should like to have come earlier. 我本想早点来的。

　　We were to have been married last year. 我们本来打算去年结婚的。