If it for his invitation the other day.I should not be here now．( )A．had not beenB．should not beC．were not to beD．should not have been 题目和参考答案——青夏教育精英家教网—

12．If it for his invitation the other day，I should not be here now．（　　）

	A．	had not been		B．	should not be
	C．	were not to be		D．	should not have been

分析如果前些日子没有同意他的邀请，现在我就不会在这里了．

解答答案：A
根据句意可知，该句是错综时间虚拟条件句．主句"I should not be here now．"表达的是与现在事实相反的情况；意为：现在我就不会在这里了；而根据if从句中表示过去的时间状语"the other day前些日子"可知，此处表达的应该是与过去事实相反的情况，所以要使用过去完成时；故选A

点评本题考查的是错综时间虚拟条件句．做此类题时，首先需要熟练掌握错综时间虚拟条件句的定义及用法：通常条件从句与主句所指的时间不一致，所以它们所使用的时态各不相同；如本题从句指与过去事实相反的情况，需要用过去完成时；而主句指的是与现在事实相反的情况，因此使用了would+动词原形的形式；有时还应根据具体的语境情况对时态作相应的调整．

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