1、 动词的过去完成时没有单数第三人称形式。过去完成时的构成方法是主语加上had加上动词的过去分词加上其它成分。
2、We had finished our homework before we got home.
3、He had seen the film twice when he came here.She had had supper when she got home.
动词的过去完成时有三单形式吗
动词的过去完成时构成是had+动词过去分词，因此动词的过去完成时没有三单形式。