Without electricity human life _____ quite different today.A.is B.will be C.would have been D.would be 我C与D不大清楚,我知道此句是虚拟语句.但是我不知道什么时候用would have been,什么时候用would be 还有讲讲Without虚

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Without electricity human life _____ quite different today.A.is B.will be C.would have been D.would be 我C与D不大清楚,我知道此句是虚拟语句.但是我不知道什么时候用would have been,什么时候用would be 还有讲讲Without虚
Without electricity human life _____ quite different today.
A.is B.will be C.would have been D.would be
我C与D不大清楚,我知道此句是虚拟语句.但是我不知道什么时候用would have been,什么时候用would be
还有讲讲Without虚拟语气的用法?最好说清楚点.没分不好意思.

Without electricity human life _____ quite different today.A.is B.will be C.would have been D.would be 我C与D不大清楚,我知道此句是虚拟语句.但是我不知道什么时候用would have been,什么时候用would be 还有讲讲Without虚
would have been表示对过去情况的假设,would be 用于对现在和将来的假设.如果没有电人类的生活会与现在有很大的不同.谈论的过去情况.
Without虚拟语气,without后跟名词,既可以表示对现在情况的假设、也可以表示对过去情况的假设.由于不是句子,所以,不用考虑时态.表示的时态取决于主句

上述的答案是错的,答案应该是D,是对现实的虚拟

without引导的介词短语相当于if引导的非真实条件句,根据句意,本句是对现实情况的假设,所以主语用would do 的形式

答案应该是D吧...

应该选D,因为与现在事实相反。如果与过去事实相反就选C。

would have been 是完成时, would be 是将来时

答案是d

此题考查虚拟语气的用法。
词此句是虚拟语气,是对过去的虚拟,因此应用“would/should/could+have+过去分词”

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