1.Research findings show wo spend about two hours dreaming e

问题描述：

1.Research findings show wo spend about two hours dreaming every night,no matter what we __D__ during the day.
A.should have done B.would have done
C.must have done D.may have done
2.A bicycle __A__ by electric power,which does good to the environment,becomes quite popular in our city.
A.driven B.being driven C.to be driven D.is driven

1个回答分类：英语 2014-11-16

问题解答：

我来补答

1 A带有责备意是指本应该做却没做后悔
B“would+have+done”虚拟语气,表示对过去事情的假设,意思是“本来会做”.
C must have done表示对已发生的事情的推测.
D may/might have done表示对过去某事可能性的推测,意为“可能已经“
附：“could+have+done”是虚拟语气,表示对过去事情的假设,意思是本来能够做某事而没有做.
2 which does good to the environment是非限制性定语从句
A bicycle drivenby electric power中省略了that 定语从句
而整个句子可看成是A bicycle that drivenby electric power becomes quite popular in our city.
还有就是：要记住 “ ,”前后不能是两个完整的句子
being driven 是正在被骑 to be driven是将要被骑

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