大后天,或是大大后天到底是怎么说的英文里面?in 3 days,;three days from today;three

如果发生在将来,比如你要跟别人定个日期
please hand in your homework in three days. 请在三天后（也就是大后天）把作业交上来
同样是发生在将来：
how much time do we have to finish it? 我们又多少时间完成它?
It's only three days from today. 姶今天算起仅有三天.
对发生在过去的事进行讲述：
three days later, he broke up with her. 三天后,他和她分手了.
再问： 三种不同时的用法能举例说明下吗？
再答： 重点就是发生了没 please hand in your homework in three days. 请在三天后（也就是大后天）把作业交上来（尚未上交）而 three days later, he handed in his homework. 三天后，他上交了作业（已上交）。