2. 职称英语
  3. This method saved half the labor that will be needed to move all the books downs

This method saved half the labor that will be needed to move all the books downs

游客2025-01-30  40
问题 This method saved half the labor that will be needed to move all the books downstairs.
选项 A、would need
B、would be needed
C、would have needed
D、would have been needed
答案 D
解析    (1)画线部分错误分析。
   本题考查含蓄式虚拟语气的用法。题干中的that从句表示与过去事实相反的情形，应当选用表过去时间的虚拟语气；此外，that引导的定语从句，其先行词为labor，它在从句中作主语，根据句意，定语从句应选用被动语态。
   (2)选项分析。
   根据上述分析，that从句中谓语动词应当用被动语态，由此可知选项A和选项C不可选；would be needed是表示对现状的虚拟，因而选项B可排除；根据句意需要选用表示过去的虚拟形式would have been needed，因此选项D正确。
   【知识拓展】语法拓展：含蓄条件句。
   很多情况下，在表示假设的虚拟语气中，有时假设的条件并不以条件从句的形式表达，而是通过上下文或句中内在的逻辑关系，或用其他形式表达出来，我们称之为“含蓄条件句”。含蓄条件句主要通过名词、连接词、不定式、分词、动名词短语、介词短语及分句来暗示。常用来表示虚拟条件的介词有with，without，in，under, but for等，它们表示的虚拟条件都可以被if从句替换。
   e．g．Without air, there would be no living things．(without air=if there were no air)
   没有空气，便没有生物。
   But that I saw it(=If I had not seen it)，I could not have believed it．
   要不是亲眼所见，我是不会相信的。
   Seen from a high mountain(=If it were seen from a high mountain)，the field in which wheat is growing would look like a great green sea．
   倘若从高山上看，麦田就像一片碧绿的大海。
   An honest man would not say this．(=If the man were honest，he wouldn’t say this．)
   诚实的人不会说这种话。
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