被动语态的正确使用方法，请详细解释被动语态的用法，谢谢

Question

如题所述

Answer 1

2.被动语态的基本结构：
主语+be +过去分词(+by+动作的发出者）
① 一般现在时：am/is/are+过去分词
如：
Trees are planted every year.
② 现在进行时 am/is/are+ being +过去分词
如：
The road is being repaired.

③ 现在完成时 have/has + been +过去分词
如：
The work has been finished.
④ 一般过去时 was/were + 过去分词
如：
The story was told by him.
Many birds were killed last year.
⑤过去进行时 was/were+ being + 过去分词
如：
The new house was being painted when I got home.
⑥过去完成时 had +been+ 过去分词
如：
He told me that the work had been finished.
⑦一般将来时 will +be + 过去分词
如：
The problem will be discussed tomorrow.
⑧ 过去将来时 would/should +be +过去分词
如：
He said that the Christmas tree would be put up soon.
⑨情态动词的被动语态
情态动词+ be +过去分词
如：
The problem must be solved soon.
Children should be taught to love animals.追问

有没有 Don't throw away the waste paper . It needs collecting so that it can be reused呢？为什么needs后面要加doing呢？

追答

need 接动名词主动形式，表示被动意义、这时动名词和主语之间有动宾关系， need doing 可转换为 need to be done 结构，意思相同。如：
My hair needs washing badly. (= My hair needs to be washed badly.)
我的头发非常需要洗一洗。
The garden needs watering. (=The garden needs to be watered.)
花园需要浇水。

追问

怎样分辨被动语态呢？像上面哪一题，我初二的无力啊