原文：
- When will it get delivered? I am leaving for a trip in 14 days, I would like to receive it before then.
- Does the 15 days include weekends? My trip is on August 14.
- One last question before confirming my order (thank you for your patience)....
- Please try to ship it out as soon as possible. It would be great if I receive it before August 14.
1.in 14 days
结合上下文会发现，意思是14天后。顾客14天后要去旅行，想在旅行前收到包裹。
2.on August 14 在具体某天用on
想起了这个顺口溜：
in年in月in季，on日on节on某夜，at时分和深夜。年月季节都用in，一周两周要用in，上午下午还是in。
3.It would be great if... 实用句型
in two days
百度上找到的如下：
1. 如果动作已经发生，那么，in 时间段：在......内。例如：
He walked two hundred and sixty miles in eight days.
他在八天里走了二百六十英里。
2. 如果动作在将来发生，那么，in 时间段：在......后。例如：
I'll have some breakfast ready in a few minutes.
我将在几分钟后把早餐准备好。
谷歌上找到的如下：
It does have both those meanings.它确实具有这两个含义。
(i) = before 2 days have elapsed. 在2天过去之前。
(ii) = in two days' time (from now). 两天后（从现在开始）。
in two days 和 within two days 的区别：
If today is Monday, and a company tells me:
如果今天是星期一，并且一家公司告诉我：
Your package will arrive in two days' time.
您的包裹将在两天后到达。
then I will expect the package to arrive on Wednesday.
那么我预计包裹会在星期三到达。
However, if today is Monday, and a company tells me:
但是，如果今天是星期一，并且一家公司告诉我：
Your package will arrive within two days.
您的包裹将在两天内到达。
then I will expect the package to arrive on Tuesday or Wednesday.
那么我预计包裹会在星期二或星期三到达。
In other words, "in two days' time" is typically a prediction, while "within two days" specifies an upper limit.
换句话说，“in two days”通常是一个预测，而“within two days”指定上限。
