Question

【題目】 ________ 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：如果他趕上了早班火車，開會就不會遲到了。主句的謂語動詞是would not have been ，說明與過去事實相反，從句則可以用if he had caught the morning train, 本句中含有had，所以不用if時，就變成了 Had he caught the morning train。所以選D。