八大时态的被动语态的公式是什么？？

这是我自己整理的,希望对你有帮助.（每个公式中的done表示过去分词）
1.一般现在时.
is/am/are+done
e.g:you're wanted on the phone.
2.现在进行时.
is/am/are+being+done
e.g:The homework is being written (by Tom)now.
3.一般将来时.
will/shall be+done
e.g:The car will be repaired （by him）tomorrow.
4.现在完成时.
have/has been+done
e.g:Many bridges have been repaired.
5.一般过去时。
was/were+done
e.g:He is seen to go out of school.
6.过去进行时。
was/were+doing+done
e.g:The room was being cleaned this time yesterday.
7.过去将来时。
would be+done
e.g:He told us that the new railway would be built the next year.
8.过去完成时。
had been+done
Our classroom had been cleaned last Tuseday.

构成公式：主语+be+过去分词

一般现在时：主语+is/am/are+过去分词

English is taught in most schools in china.

一般过去时：
The computer was put into operation in 1942.

一般将来时：主语+shall/will+be+过去分词

This problem will be sovled at a meeting tomorrow.

现在完成时：主语+have(has)+been+过去分词

Many builings have been completed in the city.

其他的几个时态你变通一下就可以了

一般过去（现在）时 ： I was / am laughed!即在动词前面加一个be动词
一般将来是好像没有，就算有也 同上
总之，被动语态就是在动词前面加上一个be动词，再结合一下时态选择正确的表达形式就可以了。

（1）一般现在时 It is locked at the moment.
（2）一般过去时 It was locked at that time.
（3）一般将来时 It'll be locked in 2 minutes.
（4）现在进行时 It is being locked now.
（5）过去进行时 It was being lock at that time.
（6）现在完成时 It has been locked since then.
（7）过去完成时 It had been locked before I went back home.
（8）过去将来时 He said it would be locked.