Without joint efforts of all the members.we our task in such a short time．( )A．shouldn't accomplishB．shouldn't have accomplishedC．couldn't accomplishD．couldn't have accomplished 题目和参考答案——青夏教育精英家教网——

题目内容

19．Without joint efforts of all the members，we ______ our task in such a short time．（　　）

	A．	shouldn't accomplish		B．	shouldn't have accomplished
	C．	couldn't accomplish		D．	couldn't have accomplished

分析句意：如果没有所有成员的共同努力，我们不可能在如此短的时间里完成任务．

解答答案：D．根据题干中的without可知，此句是含蓄虚拟条件句，相当于if条件从句if it hadn't been joint efforts of all the members，这里表示与过去的虚拟，主语用：主语+would/should/could/might+have done．而"shouldn't have done"表示过去本不应该做某事而做了，意思不对，故选D．

点评含蓄虚拟条件句中的假设条件不是以条件从句的形式来表达的，而是隐藏在上下文中或由with、without、otherwise、or、but for等词来暗示，相当于if引导的虚拟条件句．所以解题时要注意上下文的语境和这些关键词的提示．

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