过去完成时的被动语态例句

teach的各个时态的被动语态的例句如下：(时态有点多，有些合二为一，括号内是另一种时态，不常用的时态不涉及)，常用的有以下五类(共八种)：
1、一般现在时(过去时)被动语态： be(were/was) taught；
Students are(were) taught.
学生们受教育。
2、现在(过去)进行时被动语态：be(were/was) being taught；
Students are(were) being taught.
学生们现在(过去)正在受教育。
3、一般将来时被动语态：shall/will/be going to be taught；
Students will be taught.
学生们将被教育。
4、过去将来时被动语态：should/would be taught
Students would be taught.
(过去)学生们将被教育。
5、现在(过去)完成时被动语态：have/has(had) been taught；
Students have(had) been taught.
学生们(过去或现在)已经被教育过了。

过去完成时
主语+had +过去分词
We had finished learning Book1 till last week.
过去完成时的被动语态
主语+had been +过去分词
Book1 had been finished learning(by us )till last week.

就是一个被动语态的句子，时态是过去完成时
你体会一下这下面两个句子的区别
Jack has been fired since last month
Lily just told me Jack had been fired since last month.