托福语法学习：条件完成时

这种时态由would/should+完成式构成：
　　肯定式： I would/should have worked
　　 you would have worked
　　否定式： I would not/should not have worked等
　　疑问式： would/should I have worked？等
　　否定疑问式： should I not have/shouldn’t I have worked？
　　would you not have/wouldn’t you have worked？
　　这种形式用于：
　　（a）条件句中。
　　（b）would和should的特殊用法中。
　　（c）过去时中，相当于将来完成时：
　　I hope he will have finished before we get back．
　　我希望在我们回来之前他已经做完。
　　I hoped he would have finished before we got back．
　　我曾经希望在我们回来之前他已经做完。