初中英语中考语法复习被动语态知识点
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被动语态知识点
一、被动语态的用法
主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者
1.一般现在时的被动语态：is / am / are + 及物动词的过去分词
Our classroom is cleaned everyday.
2.一般过去时的被动语态：was / were + 及物动词的过去分词
A new shop was built last year.
3.现在完成时的被动语态：has / have + been + 及物动词的过去分词
This book has been translated into many languages.
4.过去完成时的被动语态: had been +及物动词的过去分词
The dish had been eaten up when I got there.
5.一般将来时的被动语态：will+ be + 及物动词的过去分词
A new hospital will be built in our city.
6.含有情态动词的被动语态：情态动词+ be + 及物动词的过去分词
Young trees must be watered often.
7.现在进行时的被动语态：am / is / are + being + 及物动词的过去分词
Uncle Wang is mending my bike now.
→ My bike is being repaired by Tom now.
8.不定式的被动语态：to + be + 及物动词的过去分词
There are two books to be read.
→There are twenty more trees to be planted.
二、怎样把主动语态改成被动语态?
把主动语态改为被动语态非常简单，可以遵循以下几个步骤：
1.先找出谓语动词；
2.再找出谓语动词后的宾语；
3.把宾语用作被动语态中的主语；
4.注意人称、时态和数的变化。
例：1.Bruce writes a letter every week.
→A letter is written by Bruce every week.
三、使用被动语态应注意的几个问题
1.不及物动词无被动语态。
What will happen in 100 years？
2.有些动词用主动形式表示被动意义。
This pen writes well.
His novel sells well.他的小说畅销。
3.感官动词或使役动词使用省略to的动词不定式，主动语态中不带to ，但变为被动语态时，须加上to 。
例：make somebody do something
→ somebody+ be +made to do something
4.如果是接双宾语的动词改为被动语态时，直接宾语(物)作主语，那么动词后要用介词，这个介词是由与其搭配的动词决定
He gave me a book.
→ A book was given to me by him.
5.一些动词短语用于被动语态时，动词短语应当看作一个整体，而不能丢掉其中的介词或副词。
We can’t laugh at him.
→He can’t be laugh at by us.
【注意】
1.以下不及物动词或动词短语无被动语态：
appear, die ,disappear, end, fail, happen, last, lie, remain, break out, come true, fall asleep, take place.
比较：rise, fall, happen是不及物动词；
raise, seat是及物动词。
(错) The price has been risen.
(对) The price has risen.
(错) The price has raised.
(对) The price has been raised.
2.不能用于被动语态的及物动词或动词短语：
fit, marry, own, wish, cost, agree with, arrive at / in, succeed in, happen to, take part in, belong to
3.系动词无被动语态：
appear, be, become, fall, feel, get, grow, keep, look, remain, seem, smell, sound, stay, taste, turn
1) It sounds good.
2) The steel feels cold
3) The method proved (to be) effective.
4.带同源宾语的及物动词(dream, live, life)，反身代词(oneself)，相互代词(each other)，不能用于被动语态：
She dreamed a bad dream last night.
He lives a happy life.
5.当宾语是不定式时，很少用于被动语态。
(对) She likes to swim.
(错) To swim is liked by her.
6.“be+过去分词”并不一定都是被动语态，有时是系表结构。
当“be+过去分词”表示动作时为被动语态，be是助动词，be后面的过去分词是主要动词，动作的对象是主语；
当“be +过去分词”表示主语所处的状态时为系表结构，be是连系动词。be后面的过去分词是表语，相当于形容词。
其区分办法如下：
1．如果强调动作或句中有介词by引导出动作的执行者，该句一般为被动语态，否则为系表结构。例如:
The glass is broken． 玻璃杯碎了。（系表结构）
The glass was broken by the boy．玻璃杯被那男孩打碎了。（被动语态）
2.如果句中有地点、频率或时间状语时，一般为被动语态。如：
The magazine is published in Shanghai．这家杂志出版于上海。（被动语态）
The door is locked． 门锁着。（系表结构）
The door has already/just been locked．门已经/刚刚被锁上。（被动语态）
The shop is opened．这家商店开门了。（系表结构）
The shop is opened at 8 a.m.everyday．这家商店每天上午八点开门。（被动语态
7.用某些不及物动词表示被动意义，如 carry,cut,drive,iron,keep,lock,open,pick,
read,sell,shut,tear,wash,wear,write等等。这类动词既能作及物动词，也能作不及物动词。作不及物动词时，形式上虽为主动，却表示被动意义。
例如：
Meat cuts easily.肉容易切。
The car drove easily.这车很容易开。
Your pen writes quite smoothly.你的笔写起来很滑。
8.某些感觉动词的主动态表示被动意义。
例如：
This shirt feels much softer than that one.这件衬衫比那件衬衫摸起来柔软得多
That book smells old.那本书有一股霉味。
These oranges taste nice.这些橙子味道很好。
以上这些动词都不能用进行时表示。若用进行时，则表示主动含义。
比较：The child is smelling the paint.小孩正在闻油漆的气味。
9.在need(want, require, deserve, etc.)doing句型中，动名词(doing)相当于动词不定式的被动式(to be done)，在意思上没有多大差别。例如：
The garden needs watering.
The garden needs to be watered.花园需要浇水。
The problem requires studying with great care.
The problem requires to be studied with great care.这个问题需要仔细研究。
These jobs want doing at once.
These jobs want to be done at once.这些工作需要马上就做。
在某些性质形容词＋动词不定式的句型中，其动词不定式的主动形式表示被动意义。(difficult, easy, hard, comfortable, pleasant, fit, unfit, light , heavy, good, safe, dangerous)
例如：
The question is easy to answer.这问题容易回答。
That book is difficult to understand.那本书难懂。
在这种句型结构中，动词不定式和主语的关系实际上是一种逻辑上的动宾关系，可以说是动词不定式作主语变换来的，相当于It’s easy to answer the question.和It’s difficult to understand that book.由于把动词宾语放在主语位置，所以和不定式的关系构成一种被动关系。
