一题语法

zyh79

同意你的想法，不过答案是B

zyh79

The fear of rabies is welled founed;(few people are known to recover from the disease after the appearance of the clinical symptoms.)
B.few people are known to have recovered from the disease once the clinical symptoms have appeared
A or B?

[此贴子已经被zyh79于2002-11-5 16:33:11编辑过]

zyh79

非常不好意思，B答案漏了一个have recovered，我已经改了。
非常感谢大家的点评
我对不定式的完成式与不定式的区别不太清楚，请指点一下！

zyh79

也就是说，TO HAVE DONE中的to并不没有“将来”的意味。

zyh79

这道题的关键看来就在于
recover必定在know之前，所以用不定式完成体。咳，一个知识点都不能漏啊
再次感谢大家！