问一个虚拟语气问题He_____the train,but he was held up in heavy traffic.A.would catchB.didn't catchC.could have caughtD.could catch这一题为什么选C,与过去事实相反的不是才选C吗,如果与过去事实相反,条件句不是应

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问一个虚拟语气问题He_____the train,but he was held up in heavy traffic.A.would catchB.didn't catchC.could have caughtD.could catch这一题为什么选C,与过去事实相反的不是才选C吗,如果与过去事实相反,条件句不是应

问一个虚拟语气问题He_____the train,but he was held up in heavy traffic.A.would catchB.didn't catchC.could have caughtD.could catch这一题为什么选C,与过去事实相反的不是才选C吗,如果与过去事实相反,条件句不是应
问一个虚拟语气问题
He_____the train,but he was held up in heavy traffic.
A.would catch
B.didn't catch
C.could have caught
D.could catch
这一题为什么选C,与过去事实相反的不是才选C吗,如果与过去事实相反,条件句不是应该用had+p.p吗,这里没有,所以应该不是与过去事实相反,为什么

问一个虚拟语气问题He_____the train,but he was held up in heavy traffic.A.would catchB.didn't catchC.could have caughtD.could catch这一题为什么选C,与过去事实相反的不是才选C吗,如果与过去事实相反,条件句不是应
这个是虚拟语气么
could have done 本可以做.
他本可以赶上火车,但他因繁忙交通受阻