2. 职称英语
  3. You ______ all those calculations! We have a computer to do that sort of thing.A

You ______ all those calculations! We have a computer to do that sort of thing.A

游客2024-07-05  59
问题 You ______ all those calculations! We have a computer to do that sort of thing.
选项 A、needn’t have done
B、must not have done
C、shouldn’t have done
D、can not have done
答案 A
解析 考点为情态动词加不定式完成结构。表示对过去的猜测；D)在结构上是正确的；B)在结构上有悖语法，应是肯定结构才对；因本题并不是表示猜测，所以B)和D)排除。C)表示的是一种责备口吻，与本题所表示的意思不想符。Need的否定式加不定式完成体可表示过去时间，表示在过去不需要，不必如此。因此A)为正确选项。同样的例子还有： You needn’t have gone there yesterday. (你昨晚不必到那儿去。)We bad plenty of bread, so I needn’t have bought a loaf. (我们有很多面包，所以我不必买下一条面包。)
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