=want/need/require+to be done 某物需要(该)……
My clothes are so dirty that they need washing.(=to be washed)
3．be to blame（应受责备）
I'm to blame for not closing the door.
④动词 let 一般不用于被动式。 通常用 allow 等意思相同的动词
来代替。
⑤动词和宾语已组成一个
不可分割的短语动词时
keep one's promise lose heart make a face
⑥在主语是物的句子里，有些动 词和主动形式可以表示被动意义
sell read feel write wear measure keep wash lock cut open
=be(well)worthy of being done =be(well)worthy to be done
The book is(well)worth reading/worthy of being read/worthy to be read.
2．want/need/require+doing
A new car factory has been started．
(7)过去完成时： had + been + 过去分词
Their homework had been done before I came in.
(8)过去将来时：
would + be + 过去分词
He was disappointed to hear that he would not given a doctor's degree．
4．be to let （……出租）
The house is to let.
5．连系动词： （1）表感觉的有：be,appear, feel,look,prove,taste,smell,sound.
(2)表变化： become,come,drop,fall, get,grow,run,turn.
（3）表依旧： continue,hold,keep, remain,stay
The flowers smell sweet. His face turned red. Please keep silent.
6．有些动词和短语动词 不用被动语态：
by the workers．
(2)一般过去时：
was(were)+过去分词
These trees were planted last year．
(3)一般将来时： will+be+过去分词
The project will be finished by 2008．
(4)现在进行时：
am(is，are)+being+过去分词
表示动作的执行者通常用 by sb． 表示用某种材料用 with sth。
试试身手
辩一辩
He was killed by an enemy．
He was killed by a stone． He was killed with a stone．
The land was covered with heavy snow.
(3)不能用被动语态的动词
①不及物动词
eg. Come, belong , last ,happen, burst out, etc.
②状态动词 eg. last, lie, stand, wind,etc.
③及物动词 的宾语是
地点、处所或组织
名词时
leave，enter，reach，suit， benefit，lack,
fallen stones. The ground was covered with heavy snow.
② get+过去分词是系表结构， 不是被动语态。
再来看一看
其它情况
英语中的大多数及物动词
可以变成被动语态，
但也有只用主动表被动的情况。
1．be(well)worth doing “……值得做
被动语态
复习
Hale Waihona Puke 语语态 主动语态被动语态 主动语态:主语是动作的执行者 被动语态:主语是动作的承受者
动作的执行者由by -短语来表示
被动语态的构成 ： 由助动词 be+过去分词
常见的几种被动语态：
(1)一般现在时：
am (is，are)+过去分词 The programme is finished
shut run fill clean
start begin blow cook
⑦连系动词
eg. be, taste, seem, appear, prove, get, turn, sound, etc.
（4）当宾语是下列 成分时也不能用被动 语态
反身代词 相互代词 同源宾语
不定式 动词-ing 形式 抽象名词
(9)情态动词：
情态动词+be+过去分词
The problem must be solved soon．
使用被动语态中要注意
的几个问题
(1)否定词 not 的位置
not 放在第一个助动词之后
His homework has not been finished．
(2)被动语态中的 by sb．(sth．) 和 with sth．
来！
作一个比较
被动语态
与
系表结构
①两者形式相同，但含义不同 The book was written by him.
(被动语态,表示主语是动 作的承受者) The book is well written．
(系表结构,表示主语的特点 或所处状态)
再来看yi看
The house was broken last night. The necklace was gone. The ground was covered by
The plan is being made at the meeting．
(5)过去进行时：
was(were)+being+过去分词
When I went there last year， a new bridge was being built
across the river．
(6)现在完成时： have(has)+been+过去分词