Name: Prepositions of Time in English: BY, UNTIL, BY THE TIME, NO LATER THAN...
Uploaded: 2017-06-15T17:44:15.000Z
Duration: 16 min 19 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

In today's video we're going to look at the prepositions: "by" and "until".

We're going to look at the differences between them, and how to use them, and what specific

We're also going to look at the expression: "by the time", as another way of using "by"

or whatever situation, and this one: "no ________ than".

Now, the reason why I left this blank is because you can actually put quite a few words in there.

We're going to look specifically at: "no later than" to replace "by" and "until", but for

now I want you to also understand that there's other uses for it, and I'll give you some

Now, before I start I will say Emma did a very good lesson about "by" and "until".

Mine is a little bit different because I'm going to show you some other situations where

So we're going to start by figuring out: What's the difference between these two?

I'll get to our little time map in a second.

"I'll be at the office until noon.", "I'll be at the office by noon."

Now, first of all, let's assume the average workday is about...

Is from 9 until about 5 o'clock, but I have some...

I have some meetings in the afternoon so I will have to leave the office.

But if you want to meet with me, I'll be there until noon.

It means that I will arrive at the office at the usual time, 9 o'clock, and I will stay there.

So my stay at the office will continue until noon.

Okay? So this is when we're using "until".

Into that again, let's look at the second one.

So, here, we're looking at somewhere in this time, but not later than noon I will arrive

Okay? Now, what's the key difference between these two?

An action starts, continues, and it ends at that time mentioned after "until".

You could even say a deadline, but that's for other uses.

Now, in the case of "by", it could happen before.

In the case of "until", only one thing will happen.

But the key to remember: When we use "by", we're looking at a finite action.

It'll... It can happen here, it could happen here, it could even happen here.

Now, what's the difference, another difference that we have to think about?

Is not only the continuance of an action and the finite situation of an action;

So if you want to meet me, I'll be in the office by noon, so you can meet me

So the start time, the earliest time you can meet me is noon.

The latest time you can meet me is just before noon because I'm leaving at noon. Right?

Now: "I'll be at the office by noon and I'll stay until 5."

You can use both of them in one sentence.

Sometime in here I'll arrive, and then from 12 till 5, I'll be at the office.

What's the key difference in these two sentences, is it the preposition?

Different prepositions, different meanings.

But what I hope you realize is that the difference is in the verb "be".

What does "be" mean here, and what does "be" mean here?

Until noon", means I will stay at the office until noon.

Timeframe I guess you could call it, something will happen.

"Finite" means it's a one-time action and that's it, it's finished.

So that's a very important thing to remember with "by".

"By", and we also think about: "at", "on", or "before".

so: "At 5 o'clock or before.", "At noon or before.",

Now, we don't use this preposition "to", but something continues to the end time.

So that's one way... Another way of thinking about these two in terms of: What's the difference?

We're going to look at a few more samples, and you'll get a better idea of when to use

Okay, so let's look at some more examples and I want to come back to this idea of finite

Now, just to clarify, again: What does "finite" mean?

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Prepositions of Time in English: BY, UNTIL, BY THE TIME, NO LATER THAN...

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