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    • 英语高手帮帮忙Never before have science and technology been so rapidly developing as it is today...

    既然是have been done,为什么用developing呢？？这样so rapidly develop，不可以吗

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    推荐答案   2011-04-08
    have修饰been，表示现在完成时。been和developing是另一个结构，表示进行时，如果理解比较困难，不妨把have been还原成原型be。之所以用developing而不是developed，是因为句末的today——它在这里是使用进行时的标志。
    温馨提示：答案为网友推荐，仅供参考
    其他回答
    第1个回答  2011-04-08
    developing发展中，而你想用的developed是已经发展成的。
    比如developing country 是发展中国家，而developed country是发达国家。
    第2个回答  2011-04-08
    这是一个过去完成进行时，强调一个动作从过去到现在一直都在进行 ，而不是进行完了
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