Question

虚拟语气 should have done 与 could have done

Answer 1

是这样的
could
have
done
中带有能力的意味，表示本来有能力去做，但没做到
而ought
to
have
done
和should
have
done
中带有肯定的意味，ought
to
have
caught
比should
have
caught
语气稍弱，但实际上没差异，表示本应该去做，而没去做，太绝对，所以要选A。

Answer 2

楼上的对的
should
have
done
译为“本应该”，意思是本应该这么做，却没有这么做
我们能赶上火车
是could
b缉揣光废叱肚癸莎含极y
the
way
ought
to
have
done
和
should
have
done
是一个意思