Question

【题目】 ________ the morning train, he would not have been late for the meeting.
A.Did he catch
B.should be catch
C.has he caught
D.Had he caught

Answer 1

【答案】D
【解析】句意：如果他赶上了早班火车，开会就不会迟到了。主句的谓语动词是would not have been ，说明与过去事实相反，从句则可以用if he had caught the morning train, 本句中含有had，所以不用if时，就变成了 Had he caught the morning train。所以选D。