Everyone went to the funeral, for the ghost was none other than Eric Cox, a third brother who was supposed to have died as a young man.
这里为何用a而不需要 the？
Everyone went to the funeral, for the ghost was none other than Eric Cox, a third brother who was supposed to have died as a young man.
这里为何用a而不需要 the？
序数词前用定冠词和不定冠词有什么区别在于，定冠词表特指，不定冠词表泛指，有类似another的意思，但比another 的意思更明确：
a+序数词+名词， 表示再/又的意思，意思在前面之后，再/又..（表示次第在原有基础上的增加）
A second student stood up.
又一个学生站了起来。
I want to read the book a third time.
这本书我想读第三次。
They have three children, but they want a fourth child.
他们有3个孩子，但他们还想再要一个孩子。
the+序数词+名词，表示第...个名词，（即表示登场/出现的一种顺序）
The second student stood up.
第2个学生站起来了。
I want to read the second book.
我想看第2本书。
名词前面加“the+序数词, a+序数词” 不同如下
I like the third girl.
我喜欢第三个女生。
I saw a third girl.
我又看见了第三个女生。
