编辑:
2015-12-27
③在时间或条件状语从句中,现在完成时可以代替一般将来时。如:
I shall post the letter as soon as I have written it.
If you have done the experiment, you will realize the theory better.
Don’t get off the bus until it has stopped.
9. 时态区别
①一般过去时与现在完成时:时间上有差异:凡有过去时间的均用过去时态,不能用完成时态,如含有ago、last year、just now、the other day等。
结果上有差异:现在完成时强调的是对“现在”的影响和结果,动作到现在刚完成或还在继续;一般过去时强调的是动作发生在“过去”,和现在毫无关系。
②过去完成时与一般过去时:过去完成时强调的是“过去的过去”;如出现同一主语连续几个动作(“连谓”)形式则只用一般过去时即可。
2、被动语态考查要点简述
被动语态的构成方式:be + 过去分词,口语只也有用get / become + 过去分词表示。被动语态的基本用法:不知道或没必要提到动作的执行者是谁时用被动语态。强调或突出动作的承受者常用被动语态(by短语有时可以省略)。
(1)使用被动语态时应注意的几个问题。
①主动变化被动时双宾语的变化。看下列例句。
My friend gave me an interesting book on my birthday.
An interesting book was given to me(by my friend)on my birthday.
I was given an interesting book (by my friend)on my birthday.
②主动变被动时,宾补成主补(位置不变);(作补语的)不定式前需加to。
The boss made him work all day long.
He was made to work all day long(by the boss)
③短语动词变被动语态时,勿要掉“尾巴”。
The children were taken good care of (by her).
Your pronunciation and spelling should be paid attention to.
④情态动词和be going to、be to、be sure to、used to、have to、had better等结构变被动语态,只需将它们后面的动词原形变为be +过去分词。
⑤当句子的谓语为say、believe、expect、think、know、write、consider、report等时,被动语态有两种形式:(A)谓语动词用被动语态,动词不定式作主补。(B)用it作形式主语,真正的主语在后面用主语在后面用主语从句来表示。如:
People say he is a smart boy.
It is said that he is a smart boy.
He is said to be a smart boy.
People know paper was made in China first.
It is known that paper was made in China first.
Paper was known to be made in China first.
类似句型有:It is said / known / suggested / believed / hoped/ thought that …
(2)不能用被动语态的几种情况。
①所有的不及物动词或不及物动词词组不能用于被动语态之中。
②表示状态的谓语动词,如:last、hold、benefit、contain、equal、fit、join、mean、last、look like、consist to等。
③表示归属的动词,如have、own、belong to等。
④表示“希望、意图”的动词,如:wish、want、hope、like、love、hate等。
⑤宾语是反身代词或相互代词时谓语动词用主动语态,不能用被动语态。
⑥宾语是同源宾语,不定式、动名词等谓语动词不用被动语态。
⑦有些动词以其主动形式表示被动意义,特别是当主语是物时,常见的动词有sell、write、wash、open、lock等。
(3)主动形式表被动意义。
①当feel、look、smell、taste、sound等后面接形容词时;当cut、read、sell、wear、write等词带状语修饰语时;当动词表示“开始、结束、关、停、转、启动”等意义时。
This kind of cloth washes easily.这种布易洗。
These novels won’t sell well.这些小说不畅销。
My pen writes smoothly.我的钢笔写起来很流畅。
The door won’t lock.门锁不上。
The fish smells good.鱼闻起来香。
②当break out、take place、shut off、turn off、work out等动词表示“发生、关闭、制定”等意思时。
The plan worked out successfully.
The lamps on the wall turn off.
③want, require, need后面的动名词用主动表示被动含义。
④be worth doing用主动形式表示被动含义。
⑤在“be + 形容词 + to do”中,不定式的逻辑宾语是句子的主语,用主动代被动。
This kind of water isn’t fit to drink.
The girl isn’t easy to get along with.
另外:be to blame(受谴责),be to rent(出租)也用主动形式表被动。
(4)被动形式表示主动意义的几种情况。
①be seated坐着
He is seated on a bench.(He seats himself on a bench.)坐在凳子上。
②be hidden躲藏
He was hidden behind the door.(He hid himself behind the door.)他藏在门后。
③be lost迷路
④be drunk喝醉
⑤be dressed穿着
The girl was dressed in a red short skirt.
(5)被动语态与系表结构的区别
被动语态强调动作;系表结构表主语的特点或状态。如:
The book was sold by a certain bookstore.(被动语态)
The book is well sold.(系表结构)
二、精典名题导解
选择填空
1. Visitors ________not to touch the exhibits.(NMET 2001)
A.will request B.are requested
C.are requesting D.request
解析:答案为B。此题的时态是不难判断的,因为说的是一条规定,所以用一般现在时,而visitor与request之间是动宾关系,即request visitors not to touch the exhibits,究竟是谁要求他们这样做呢?不清楚,也不必知道,因此需要用被动语态。分析visitors与request之间的关系是此题的解题关键。
2. Selecting a mobile phone for personal use is no easy task because technology __________ so rapidly.(NMET 2001)
A.is changing B.has changed
C.will have changed D.will change
解析:答案为A。此题考查现在进行时态的用法。句意为“选择一部移动电话不是一件容易的事,因为科技发展得十分迅速。”本句的主句一般现在时表达的是目前的情况,而“科技发展迅速”也是现阶段正存在的一种状态,不是在过去,也不是在将来,因此只能用现在进行时表达。
3. All the preparations for the task ___________, and we’re ready to start.(2000年春季高考)
A.completed B.complete
C.had been completed D.have been completed
解析:答案为D。现在完成时表示过去年做的事对现在的影响。从and we’re ready to start句意可知,一切准备工作已经就绪,可以开始工作了。complete是及物动词,与句子的主语是被动关系,所以需要用被动语态表达。注意①分清complete与主语之间的关系;②结合语境选择正确时态。
最后,希望精品小编整理的高考英语学科时态考点对您有所帮助,祝同学们学习进步。
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