完美动词用英文怎么说呢

完美动词是指表示完成的动作或状态的动词。在英语中，完美动词通常由助动词"have"和过去分词构成，例如：

have finished: 完成
have eaten: 吃过
have gone: 去过

完美动词常用来表示过去发生的动作对现在造成的影响或结果。例如：

I have finished my homework. (我已经完成了作业。)
She has eaten all the cookies. (她把所有的饼干都吃了。)
They have gone to the store. (他们去商店了。)

完美动词的来源可以追溯到古英语时期。在古英语中，完美动词是由助动词"habban"和过去分词构成，例如"gehabban" (已经做) 和 "geþæht" (已经想)。在中古英语时期，完美动词的形式发生了变化，"habban"变成了"have"，并且加入了一些新的助动词，如"be"和"shall"。

以下是一些其他常见的完美动词：

have done: 做过
have seen: 看过
have heard: 听过
have known: 知道
have loved: 爱过
have lost: 丢失

例句：

I have done my best. (我已经尽力了。)
She has seen the movie twice. (她看过这部电影两次。)
They have heard about the new restaurant. (他们听说过这家新餐厅。)
I have known him for years. (我认识他好几年了。)
She has loved him since they first met. (他们第一次见面