Question

能否详细讲解一下为什么不选B啊？不是说不定式的完成时可以表示不定式所表示的动作发生在谓语动词之前

I got to the office earlier that day, ____ the 7:30 train from Paddington
A. caught
B. to have caught
C. to catch
D. having caugh

Answer 1

你说得对 但本题 不定式所表示的动作 如果发生在谓语动词之前 却不能 表示原因
所以B. to have caught 绝对是错的

所以答案是D. having caught 可以看做原因状语

Answer 2

这个句子正确语序是Having caugh the 7:30 train from Paddington，I got to the office earlier that day.这样应该比较清楚了。
而不定式的完成时这种用法就只会出现在sb seem to ,或者sb is reported to 等的固定句型后面，只要是想表达已经，或者过去发生的事，例如She seemed to have heard about this matter. 她似乎已听说过这件事。