假设1号考试挂科，6号补考，今天是8号。那如何翻译以下句子:
他一周前挂科，之后的第5天补考。
他2天前补考，向前数第5天挂科。
分别使用before与after及分词作状语的形式造句。
还有假设今天是4号，下面这两个句子是对的吗？
He failed his Math exam 3 days ago, attending the make-up exam 2 days later.
He failed his Math exam 3 days ago, before he will attend the make-up exam 2 days later.
Comments
He failed his math exam a week ago, and took a make-up exam 5 days after he failed.
He took a make-up exam on math 2 days ago, because he failed it 5 days before that.
He failed his math exam 3 days ago, and will take the make-up exam in 2 days.
He failed his math exam last week, and took the make-up exam 2 days ago.
要注意作为比较基准的时间节点到底是哪个，如果前后不是同一个，需要指出来，或者统一
那不指出就是与现在比较？
对，没有特别说明的话，一般默认是你描述这件事/谈及这件事的对话发生的时候。你提供的中文原句，“之后”和“向前数”就是担任指出时间节点的功效
直接写日期不行吗
这sub已经下沉到这个地步了？
He failed this exam a week ago, now he have to take the make-up exam 5 days after
He had his make-up exam because he failed the exam 5 days before that.
层主没有理解明白我的意思。
It’s fucking English. It’s not math
英语里的句子可以很短的，没必要用这样的句式把两句连成一句话。
另外如果只是表意的话，第一句可以是 He failed his math exam 3 days ago. His make-up exam was two days after 或者 He attended the make-up exam two days after。你想表达的就是补考日子在哪天的事实（或者这个人在哪天参加了考试的事实），无需用连句句式暗示因果关系
第一句我理解的意思是他三天前挂了 但是两天后补考 也就是昨天补考 第二句不make sense 理解不了
纯语法来看的话，第一句没问题，第二句很怪，或者说是错的。
如果是叙述纯粹过去的事情，just before he would take the make-up exam after 3 days. 或者如果你要表达2天前考砸了，3天后补考，那么第一句和这一句没问题He failed his exam 2days ago, and he will/is going to take his make-up later in 3 days.
为什么不能用before？
而且正常情况下这里用before逻辑上说不通，你这里所要表达的是因为考砸了所以要补考，除非语境是故意考砸，这个没有谁会那么干吧？
如果你一定要用，那么请去掉comma
说last or next星期几
第一句的attending错了吧，得用将来时或者直接attend。第二句也错了吧，before是介词，后边要接从句形式的句子不是直接一个句子。
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状语从句没学过?
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