本试题 “New technology _____ to make sure the cars, taxis, buses and trains we use _____ the air.A. is used; not to polluteB. has used; is not pollutedC. i...” 主要考查您对现在进行时的被动语态
宾语从句
等考点的理解。关于这些考点您可以点击下面的选项卡查看详细档案。
现在进行时的被动语态：
现在进行时的被动语态表示现在进行时态和被动语态的叠合，由am/is/are+being+done构成。
现在进行时态的被动语态的基本结构的构成：
1、现在进行时态的被动语态的肯定式为：am/is/are+being+done。
如：The question is being discussed at the meeting now. 这个问题现在正在会上被讨论。
Another bridge is being built over the Changjiang River at present. 目前长江上正在建造另一座大桥。
2、现在进行时态的被动语态的否定式为：am/is/are+not+being+done。
如：The baby isn't being taken good care of. 这婴儿没在得到很好的照顾。
The animals are not being set free at present.目前这些动物还不能被放出。
3、现在进行时态的被动语态的一般疑问句需将am/is/are提到主语的前面。（回答用yes或no）
如：—Is a new library being put up in their school now？他们学校现在正在建一座新图书馆吗？
—Yes, it is. 是，正在建一座新图书馆
—Are a number of Dongfeng trucks being shipped abroad? 一批东风卡车正被运往国外吗？
—No, they aren't. 不，没有。
4、现在进行时态的被动语态的特殊疑问句为：疑问词+am/is/are+(主语)+being+done。
如：What is being done to the machine? 现在对这台机器要采取什么措施？
How many houses are being built in the village? 村里正在建造多少房屋？
When is the sports meeting being held in our school. 我校将在什么时候举行运动会？
现在进行时态的被动语态的用法：
1、现在进行时态的被动语态的同它的主动语态一样，表示现在正在进行的被动动作。
如：He is being interviewed by our headmaster now. 他正在接受我们校长的采访。
This film is being shown now. 这部电影正在被放映。
2、现在进行时态的被动语态的同它的主动语态一样，表示现阶段正在进行的被动动作。
如：The disease is being studied by scientists. 科学家们正在研究这种疾病。
These animals are being hunted at such a speed that they will disappear soon.
以如此速度捕杀动物，他们很快就会消失。
3、现在进行时态的被动语态一般不与表示一段时间的状语或表示次数的状语连用，这时需要用完成时态的被动语态。
例如：The watch is being repaired twice.
改成：The watch has been reparied twice.
The house over there is being built for two months.
改成：The house over there has been built for two months.
4、少数及物动词的的进行时表示按计划、安排将要承受某个动作。
如：Some rock music is being played by the mnext. 下面将由他们演奏一些摇滚音乐。
A party is being held tonight. 今晚将举办一场晚会。
5、典型错误：
1）遗漏助动词：
【误】The birds being set free at present.
【正】The birds are being set free at present.
2）遗漏介词：
【误】The children are being taken care by their aunt.
【正】The children are being taken care of by their aunt.
3）忽略动词的性质：
【误】The kind of cloth is being washed well.
【正】The kind of cloth washes well.
注：表示某种情况，状态或特点的动词，一般不用于被动语态。
宾语从句的概念：
置于动词、介词等词性后面起宾语作用的从句叫宾语从句。宾语从句的语序必须是陈述语序。谓语动词、介词、动词不定式，v.-ing形式后面都能带宾语从句。有些形容词（afraid, sure, glad等）之后也可以带宾语从句。
宾语从句的用法：
1、宾语从句的引导词：
宾语从句通常由连词that和whether(if)、连接代词或连接副词以及关系代词型what引导：
如：We believe that he is honest. 我们相信他是诚实的。
I don't know whether he'll arrive in time. 我不知道他是否能及时到。
I don't know who(m) you mean. 我不知道你指谁。
He asked why he had to go alone. 他问他为什么必须一个人去。
Please tell me which you like. 告诉我你喜欢哪一个。
She has got what she wanted. 她要的东西得到了。
注：有时介词后可接跟一个宾语从句(但介词后通常不接that和if引导的宾语从句)：
如：From what you say, he is right. 根据你所说的，他是对的。
有极个别介词(如but,except)可接that引导的宾语从句：
如：She remembered nothing about him except that his hair was black. 她对他什么都不记得，只记得他的头发是黑的。
2、宾语从句与形式宾语it：
当宾语从句后跟有宾语补足语时，通常在宾语从句处使用形式宾语it，而将真正的宾语从句移至句末：
如：I think it best that you should stay here. 我认为你最好住这儿。
He hasn't made it known when he is going to get married. 他还没宣布他何时结婚。
3、连词that的省略问题：
引导宾语从句的连词that通常可以省略：
如：She said(that) she would come to the meeting. 她说过要来开会的。
I promise you(that) I will be there. 我答应你我会去。
注：有时为了强调，that引导的宾语从句可位于句首，此时that不可省略：
如：That she is a good girl I know. 她是一个好姑娘，我是知道的。
4、宾语从句与否定转移当动词think, believe, suppose, expect, imagine后接一个表示否定意义的宾语从句时，其否定通常转移到主语：
如：I don't suppose that it is true. 我认为那不是真的。
I don't imagine that he will come. 我想他不会
使用宾语从句特别注意：
一、宾语从句的语序：
宾语从句的语序是陈述句语序即：连接代词/副词+主语+谓语+其他成分。
如：I don't know what they are looking for.
Could you tell me when the train will leave?
Can you imagine what kind of man he is?
二、宾语从句的时态：
主句是一般现在时，从句根据实际情况使用任何时态。
句：The headmaster hopes everything goes well.
主句是过去时态，从句须用过去时态的某种形式。
句：She was sorry that she hadn't finished her work on time.
当宾语从句表示的是一个客观真理或者事实时，即使主句是过去时，从句也用一般现在时态。
如：The teacher told his class that light travels faster than sound.
三、宾语从句的特点：
宾语从句可以作及物动词、介词及形容词的宾语。宾语从句的语序一律用陈述句语序。连接词that引导宾语从句在句中无词义，不充当句子成份，多数情况下可以省略。whether和if都可引导宾语从句，但whether后可紧跟or not；whether从句可作介词的宾语。如果从句太长，可以用形式宾语it.
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