Thankyouforgivingmesomuchhelp.I_______intheexperimentwithoutyoursuppo

Thank you for giving me so much help. I _______in the experiment without your support.A.have failedB.will failC.would have failedD.must have failed

C解析试题分析：考查虚拟语气。本题中的介词without要不是…；如果没有…；这是一个含蓄的条件句，句意：多谢你给我的帮助，如果没有你的支持，我就会在实验中失败。根据句意说明是与过去事实相反，故使用“情态动词+have done”。D项的must have done一定做了某事；表示对过去事情的推测，而不是虚拟。故C正确。考点：考查虚拟语气点评：虚拟语气是高考每年的必考点，用法较多，其中的without引导的含蓄条件句。平时学习应积累巩固。1. 与现在事实相反：Without air, man couldn't exist on the earth.没有空气的话，人类将不能在地球上生存。谓语动词：would/could/might (not) do sth.2. 与过去事实相反：Without your help, I would have failed the exam last week.没有你帮助的话，我上周考试可能就通不过了。谓语动词：would/could/might (not) have done sth.3. 与将来事实相反：Without your ticket, I wouldn't be able to go to the concert tomorrow.要是没有你的票的话，我明天就不能去听音乐会了。谓语动词：would/could/might (not) do sth.

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