分析 本文讲述的是环境污染的问题.
科学家们到乡村看到严重的污染,从空气到河流都被严重的污染了.他们说服政府通过了保护环境的法律,保持大自然的平衡.现在一切都改变了,鸟儿在歌词,树木和花草在生长.
解答 A group of scientists were planning to go to∧countryside to do a scientific research in order to find out that whether the environment of the country had∧polluted.On arrival,they started to check the air and water.To our surprise,they found how terribly the situation was.They couldn't see the serious pollution.Look into the cause,they persuade the government to pass the law to protect environment and kept the balance of nature.Now everything has changed.Birds are singing while tree and grass are waving.
解析:
1.countryside 前加the.考查冠词.表示"乡下"用the countryside.
2.去掉that.考查宾语从句的引导词.whether 引导宾语从句the environment of the country had polluted
表示"是否环境已经被污染",所以去掉that.
3.polluted前加been.考查被动.主语the environment of the country 和谓语动词polluted 之间是被动关系,所以polluted前加been.
4.our改为their.考查代词. 和上句的主语they呼应用their.
5.terribly改为terrible.考查形容词.做the situation was的表语用形容词terrible,表示"他们知道情况使多么恶劣".
6.couldn't 改为could.考查逻辑关系.根据上句表示"他们知道情况使多么恶劣",可知本句表示"他们能够看到严重的污染",所以应该是肯定句,couldn't 改为could.
7. Look改为 Looking.考查非谓语动词.Look into the cause做伴随状语,和主语they 之间是主动关系,所以用现在分词 Looking.
8. persuade 改为persuaded.考查谓语动词的时态.本句讲述的是过去的事,所以谓语动词用过去式persuaded.
9.kept改为keep. 考查并列一致关系.和to pass the law to protect environment 并列,做目的状语,因词用kept 的原形keep.
10.tree改为trees.考查名词.tree是可数名词,本句表示"树木"所以用复数trees.
点评 考查短文改错.
被动语态的基本时态变化
被动语态由"be+及物动词的过去分词"构成,be随时态的变化而变化.以do为例,各种时态的被动语态形式为:
1)am/is/are+done (过去分词) 一般现在时
Visitors are requested not to touch the exhibits.
2)was/were done 一般过去时
I was given ten minutes to decide whether I should reject the offer.
进行时态的被动语态加being
3)am/is/are being done 现在进行时
A new cinema is being built here.
4)was/were being done 过去进行时
A meeting was being held when I was there.
完成时的被动语态加been
5)has/have been done 现在完成时
All the preparations for the task have been completed,and we're ready to start.
6)had been done 过去完成时
By the end of last year,another new gymnasium had been completed in Beijing.
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