题目内容

4．If she ___ about his financial situation，she would have helped him out．（　　）
A．knewB．had been knowing
C．had knownD．have known

分析 如果她知道他的经济状况，她会帮他摆脱困境的．

解答 答案：C
分析句意可知，本句是虚拟条件句；由于主句的谓语部分使用了"would have helped"，因此此处表示与过去事实相反的情况；根据时态对称的原则，从句应该使用过去完成时，故选C

点评 本题考查了虚拟条件句的用法．在确定了该句为虚拟条件句后，需要根据虚拟条件句中关于时态对称的原则，选择相应的时态；如：本题考查了当表示与过去事实相反的情况时，从句使用过去完成时，主句用would/should/could/might+have+动词的过去分词．

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