老板跟你說“by Friday”，是周五結(jié)束前還是周五當天呢？

?你怎么理解?

周五下班前，還是周五一早交?

學(xué)習英文要仔細，

馬上來學(xué)吧!

By Friday 包不包括周五?

我們先看兩個例句：

①Please send it by Friday.

最晚周五發(fā)給我

(Friday is the deadline)

(周五是截止日期)

②Please send it before Friday.

周五之前發(fā)給我

(Friday is too late. I need it in advance of Friday)

(周五就太晚了，最遲周四晚上)

這里我們把by和before放在一起來比較一下它們兩個詞的區(qū)別

來理解它們正確的用法

If you want the job to be ready on Friday morning, you would say

如果你要求在周五早上的時候工作是完成了的，你應(yīng)該說

Please do this before Friday

If you need it to be done either before or during Friday, you would say

如果你要求工作在周五或之前完成，你應(yīng)該說

Please do this by Friday

In other words, using by is inclusive, it means do this on any day up to and including the day specified. Using before is non inclusive, it means that I expect it to be done when I arrive on Friday morning.

換句話說，用by是包括的，它的意思是干什么在某天之前或者包含那天。用before是不包含的，意思是我希望我周五早上一來你的工作是做完了的。

after怎么用?

after+一段時間(模糊時間)用來表達在這段時間之后

例：

So, the week after next I will be starting an internship with Apple.

因此，從下下周開始，我到蘋果實習。

He will fly to Madrid the month after next.

他將在下下個月飛往馬德里。

但是，

“三周后”就不要用"after three weeks"了，

它的正確表達應(yīng)該是

"in three weeks"。

in怎么用?

in+一段時間(明確時間)可以用來表達一段時間結(jié)束

例：

I'll find a job in two weeks.

兩周內(nèi)我會找到工作

We can have the May Day holiday in three weeks.

三周(結(jié)束)后又可以放五一假。

You can finish reading the book in a month.

你可以在一個月內(nèi)看完這本書。

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