1、SVO句型的被动结构 
SVO句型中的谓语为单宾及物动词，其被动结构是：S + V(被动式) (+ by短语)。例如： 
He wrote the book two years ago. → The book was written by him two years ago. 这本书是他在两年前写的。
They are cleaning the house. → The house is being cleaned (by them). 房子正在被（他们）打扫。
 You’re wanted on the phone. 有你的电话。 

2、SVoO句型的被动结构 
SVoO句型中的谓语动词为双宾及物动词，其被动结构是：S + V(被动式) + O/o(保留宾语) (+ by短语)。
需要说明的是，一般把间接宾语（表示人）作为被动句的主语，而把直接宾语（表示物）作为保留宾语。如果把直接宾语作为被动句的主语，则间接宾语作为保留宾语，它的前面通常要用介词to或for（视动词而定）。例如：
My aunt gave me an apple. → *I was given an apple. / An apple was given to me. *有人给了我一只苹果。［被动句中省略了by my aunt。］
His mother bought him a new coat. → *He was bought a new coat. / A new coat was bought for him. *有人给他买了一件新大衣。［被动句中省略了by his mother。］ 

3、SVOC句型的被动结构
SVOC句型中的谓语动词为复宾及物动词，其被动结构是：S + V(被动式) + C(主语补足语) (+ by短语)[1]。例如：
People usually call me Jim for short. → I am usually called Jim for short. 我常常被人直呼吉姆。
They asked Mike to write soon. → Mike was asked to write soon. 迈克被要求尽快写信。
He made the baby laugh. → The baby was made to laugh (by him). 那个婴儿被（他）逗笑了。［请比较前后两句中的划线单词，被动句中需要加上to。］
在被动句中作主语补足语的不定式一律要带to，不论其作宾语补足语时是否带to（请见以上各例句）。 

4、短语动词的被动结构
短语动词的被动结构是：S + V(被动式) + 介词/副词 (+ by短语)。例如：
We have sent for a doctor. → A doctor has been sent for. 已经派人去请医生了。
I turned off the radio just now. → The radio was turned off just now. 收音机刚才（被）关掉了。
They are taking good care of the children. → The children are being taken good care of. 孩子们正在受到良好的照顾。
在将含有短语动词的主动句转换成被动句时，原短语动词中的介词或副词（如以上句中的for, off, of）不能遗漏。 

5、带情态动词的被动结构
带情态动词的被动结构是：S + V(情态动词+主要动词的被动式) (+ by短语)。例如：
You must do it at once. → It must be done at once. 这件事必须立即做。
We can see the park from the window. → The park can be seen from the window. 公园可以从窗户那里看到。