英语现在完成时语法

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 知识点讲解 



一、现在进行时的被动语态
1. 现在进行时的被动语态的形式
肯定式:主语 + am/is/are + being + v-ed
否定式:主语 + am/is/are + not + being + v-ed
一般疑问式:Am/Is/Are + 主语 + being + v-ed
特殊疑问式:疑问词 + is/are + 主语 + being + v-ed
This film is being shown now. 
Some animals are not being protected well enough.
— Is the car being repaired? — Yes, it is. / No, it isn’t.
— Where is the machine being repaired? —In the factory.

2. 现在进行时的被动语态的用法
① 表示正在进行或正在发生的被动动作。
My bedroom is being painted now. 
② 表示现阶段或目前这段时间正在进行的被动动作,但这一被动动作在此时此刻不一定正在发生。
The bridge is being built by the workers from Shandong Province. 
③ 少数及物动词的进行时表示按计划、安排将要承受某个动作。
A concert is being held tonight.
④ be + under/in/on + n.可表示现在进行时的被动语态的含义。
The telephone is in use. = The telephone is being used.
Many new products are on show. = Many new products are being shown.
⑤ 与情态动词连用,表示对现在正在发生的被动行为的推测。
— Do you know what John is doing ?
— He is ill. He may be being examined by the doctor.
⑥ 注意短语动词变为被动语态时,短语中的介词或副词不能省掉,应当看成一个整体。
The children are being taken good care of here. 

二、现在完成时的被动语态
1. 现在完成时的被动语态的形式
肯定式:主语 + have/has + been + v-ed
否定式:主语 + have/has + not + been + v-ed
一般疑问式:Have/Has + 主语 + been + v-ed
特殊疑问式:疑问词 + have/has + 主语 + been + v-ed
This book has been translated into many languages.
She has not been told about it yet.
The fire has got to the fifth floor. Have all the people been saved?
Who has been invited?

2. 现在完成时的被动语态的用法
① 表示被动的动作发生在过去,强调对现在造成的影响和结果。
The door has been locked.
② 表示一个被动的动作或状态开始于过去,持续到现在,并可能将持续下去,常与for a time、since、how long等时间状语连用。
The child has been taken care of by his grandma all these years.

3. 使用现在完成时的被动语态需要注意的问题
① 现在完成时的被动语态有两个助动词,即have/has和been,两者缺一不可。
② 注意其与一般过去时的被动语态的区别。一般过去时的被动语态表示一个被动的动作发生在过去某个时间,其结果对现在没有影响;而现在完成时的被动语态的动作或状态尽管发生在过去,但强调该动作或状态对现在造成的影响和结果。
The house was built last year.The house has been built. We can move in.
③ 由finish、buy、start、begin、return、borrow、join、marry、open等短暂性动词构成的现在完成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思,则需改换动词或时态。
[误]How long has this book been bought?
[正]How long ago was this book bought?
④ 短语动词是一个不可分割的整体,在被动结构中要保持完整性,不可省略短语动词中的介词或副词。
The kid has been well looked after.
⑤ 并不是所有动词都有被动语态。如happen、take place、break out、belong to、last等不及物动词或词组,就没有被动语态。
It’s the best thing that has ever happened to me.
注意:不定式符号to在被动语态中不可省。在主动语态中,如果感官动词和使役动词后的宾语补足语是动词,这个动词前往往省去to,但在被动语态中要带to。



 即学即练 



用所给动词的适当形式填空。
 1. A new cinema       (build) here. They hope to finish it next month. 
 2. Rainforests      (cut) and burned at such a speed that they will disappear from the earth in the near future.
 3. — The window is dirty.
 — I know. It      (not clean) for weeks.
 4. Paper money      (use) for over nine hundred years.
 5. — Have you moved into the new house?
 — Not yet. The rooms      (paint).

【参考答案】
 1. is being built 
2. are being cut
3. hasn’t been cleaned 
4. has been used 
5. are being painted



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