常见的用法是have done和have been done,have done是主动形式的现在完成式,have been done是被动式的现在完成式。 1、done的含义及相关短语用法 形容词adj.已完成的;煮熟的;合乎礼仪的;合乎规矩的感叹词表示接受建议)动词·做(do的过去分词);干。 must+have+done:表示...
15过去将来完成时(would have done) 表示就过去某一时间而言,将来某一时间之前所完成的动作。常用在虚拟语气中,表示与过去事实相反。 例:I believed by the end of that year an advanced version of that software would have been developed, but I was wrong. 我坚...
过去将来完成时:(would have done) 例:I believed by the end of that year an advanced version of that software would have been developed, but I was wrong. 我坚信到那年年底为止,那个软件的新版本将被开发出来。但是我错了。 16 过去将来完成进行时:(would hav...
15.过去将来完成时:(would have done) 例:I believed by the end of that year an advanced version of that software would have been developed, but I was wrong. 我坚信到那年年底为止,那个软件的新版本将被开发出来。但是我错了。 16.过去将来完成进行时:(would ...
13. 过去将来完成时:(would have done) 表示到过去将来某一时间已经完成的动作,并且对过去将来那一时间点产生影响。 例:I believed by the end of that year an advanced version of th...
更多内容请点击：been和done的区别