Question

have been done的例句。

Answer 1

Of the ten assignments two have been done for you.
十个作业里两个已经为你做了。
Of all the performances of Tchaikovsky's piano concerto few have been done as beautifully as this one.
所有的柴可夫斯基的钢琴协奏曲演奏很少比得上这一场精彩。
Given that all the necessary steps have been done correctly this experiment should not fail.
鉴于所有的必须步骤已经正确完成，这个实验不应该失败。

Answer 2

这个就是现在完成时的被动语态呀

你这里的done如果是do的过去分词
例如： A lot of good deeds have been done by him 他做了很多好事。

也可能是其它实义动词的过去分词

These projects have been finished already. 这些项目已经完成。

追问

第一句不是应该翻译成 很多好事被他做了吗？