Leonardo da Vinci(1452-1519)--------- birds kept in cages in

/>1 be said to have done sth :发生在谓语动词之前,to是动词原形的标志,所以to后面用动词原形2 be said to +动词原形3 相同的结构还有be thought to be believed to + do / be donebe reported to + be doing be considered to + have( been) donebe known to be found to 再问： 不是说句子里有两个谓语动词时先发生的用had done吗？ 再答： 你好。因为有了谓语动词，比如说，be found to ，后面就要用完成式的原形： I find that he was here last week。 --------- == He is found to have been here last week。 (仔细研读，你就明白了。祝你愉快。)