Question

I paid a fine of 200yuan for speeding. If only I _________ the traffic rules!

A．had respected	B．respected
C．would have respected	D．could respect

Answer 1

A

试题分析：对过去情况的虚拟，条件句中用过去完成时，主句用“would/should/might/could + have + 过去分词”，故选A。
点评：解答这类题目，首先需要准确判断出是真实条件句还是虚拟条件句。真实条件句所表示的假设是有可能实现的，而虚拟条件句所表示的假设是不可能或不大可能发生的。