题目内容
12.If the rules of perspective had not been discovered,no one _______ able to paint such realistic pictures.( )A. | would have been | B. | should have been | ||
C. | must have been | D. | could have been |
分析 如果没有发现透视法则,谁也不能画出如此真实的花.
解答 答案是A.本题考虚拟条件句.与过去事实相反的虚拟条件句中往往用过去完成时,主句中用"would/should/could/might+have done";由从句中的过去完成时had not been found 判断这是与过去事实相反的虚拟条件,排除C项;could表示"能够",不与be able to 连用,所以排除D;情态动词would表示"会",should表示"应该";根据句意是"不会能够",所以判断答案是B.
点评 在掌握虚拟语气的规则的基础上,判断题干属于什么类型的虚拟,然后根据语境,选用恰当的动词形式表达虚拟.
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