be加过去分词done,这个是被动语态的结构。说是什么时态,那得看be动词了。be动词是am,is,are,就是一般现在时态,是was,were,就是一般过去时态,是have been,has been就是现在完成时等。
be动词加过去分词是什么时态
被动语态的时态由被动结构“be+过去分词”中的动词be来体现,其基本结构和用法如下:
(1)一般现在时的被动语态:am [is, are]+过去分词
English is taught in our school. 我们学校学英语。
We are taken good care of at school. 我们在学校受到很好的照顾。
(2)一般过去时的被动语态:was [were]+过去分词
He was taken to the police station. 他被带到了警察局。
The house was built ten years ago. 这座房子是10年前建的。
(3)一般将来时的被动语态:will be+过去分词
A new building will be built here soon. 不久这里将建一栋新楼。
The meeting will be held at two this afternoon. 会议将于今天下午2点举行。
(4)现在完成时的被动语态:have [has]been+过去分词
All the work has been done now. 所有的工作现在都做好了。
Have the letters been posted? 信都寄了吗?
(5)过去完成时的被动语态:had been+过去分词
He said the work had been finished. 他说工作已完成了。
(6)现在进行时的被动语态:am [is, are] being+过去分词
My watch is being repaired by him. 我的表正在由他修理。
The plan is now being discussed. 计划现在正在讨论。
(7)过去进行时的被动语态:was [were] being+过去分词
He said that the man was being operated on. 他说那个人正在动手术。
He told me that a new station was being built. 他说正在修建一个新车站。
(8)过去将来时的被动语态:would be+过去分词
He said that the meeting would be held next week. 他说会议将于下周举于。
be动词的基本用法
一、“be+状语(表示地点,用副词或介词短语表示之)”:
1.Their machine is here.他们的机器在这里。
2.The sample is on the working table.样品在工作台上。
二、“be+名词、形容词或介词短语等(作表语)”:
1.Iron is useful.铁是有用的。
2.Our victory is a great victory.我们的胜利是伟大的胜利。
三、“be+过去分词”一般系被动语态:
1.The plant was built in 1958.该厂建于1958年。
2.This book will be translated by the old workers.这本书将由那些老工人来翻译。
四、“be+-ing”一般表示正在进行时态:
1.They are designing a new-type machine.他们正在设计一台新型机器。
2.This kind of machine was being designed by the engineers.当时这种机器正由工程师设计。
注:注意用逻辑判别方法把-ing(动名词)作表语的情况和本句型分开。例如:
Our task is building socialism.我们的任务是建设社会主义。
由于主语task产生不了“正在建设”这个行为,故从逻辑上就可判定谓语不能构成进行时态。
五、“be+动词不定式”一般用来表示计划、安排或约定将要实行的行为:
1.The method is to be described in detail.这种方法将予以详细说明。
2.He is to leave at night o'clock this evening.他要在今晚八点钟离开。
注1:有时“is(或are)to be +过去分词”这种结构含有can be,must be的意思。例如:
1.This compound is rarely to be found in nature.(=This compound can rarely be found in nature.)这种化合物在自然界很少发现。