Name: 學習英語語法：情態詞--"可以 "還是 "應該"？ (Learn English Grammar: Modals - "could" or "should"?)
Uploaded: 2021-01-14T05:13:32.000Z
Duration: 10 min 3 s
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What's up, Mr. E? We could be finished in 20 minutes, is that right? Oh, hi. James,

現在進行式

from EngVid. Mr. E and I were talking about something. We're having a little disagreement.

Well, not a disagreement, but a conversation. I think this lesson could be about five, ten

minutes. He said it should be 15. That's a standard lesson length. What's the difference?

I don't know. Why don't we go to the board and find out?

If this looks familiar, it should be. This is the -- "it should be". See? This is the

second lesson of modals that we're doing. The first one we did was excuses. Yeah? You

could've taken that lesson. If you haven't, close this one down; watch that; and come

back to this one. This one is actually on expectation. You know? Sometimes, people make

excuses for not doing stuff. And other times, our expectations are what we think should

happen in the future or could happen. This lesson will help you find out how native speakers

use modals in a little different way than you're used to or in the usual grammar setting.

Once again, quickly we'll go over it. What do modals do? Well, modals talk about obligations

or possibilities, right? Possibility indicates future. Future. When we talk about what's

possible. An obligation is what you should do. So if you mix those together, that's what

an expectation is -- is what is possible and what we think people or things should do or

happen. Right? Your obligation or the obligation. But let's take a look at this here. Let's

First of all, when we talk about modals, which I've just done -- you know, they express future

possibility or obligations. Let's look at the verb "to be" or the Be verb. The Be verb

is about relative truth. And you're probably going to say to me, "What the hell is relative

truth?" Well, relative truth is somebody believes it's true, and it depends where you sit. Right

now, you're looking at me, and I'm a tall guy. I'm skyscraper tall. I'm a giant. But

only if you're this tall. If you can't see me, it's because I'm a very tiny little man

looking up at Big James. Understand? So relatively speaking, if you're this big, anything this

big is big. But anything this big, big, big, big, big, big is bigger than this. Understand?

"Relative" means it depends on who is looking at it, right? If you're 60, 40 is young. If

you're 40 years old, 20 is young. And if you're 10, they're all old, okay? Relative truth.

So that's what the Be verb means. So once we put a modal, okay, with the Be verb, it

changes it. It gives it a different meaning. And what we want to look at now is what does

that mean, this change, or how does it change it? And the video before, I mentioned, we

noticed how we use it for excuses. In this one, we're going to see how we think the future

should be or could be, all right? Let's go.

So what is -- the modal should mean? Well, "should" is what we usually think -- "should"

is what is right, okay? We think it is right or probable, most likely to happen, or the

correct or right thing to do. That's why we use it as an advice modal. "You should go

to school. You should eat your dinner. You should shut up." Okay? We use it as advice.

The last one is strong advice. Okay? And "could" is possible. What's possible? You could be

talking to me live if you come to Canada. Or you could be dreaming this whole thing.

Press reset and see if that's the case. But no. "Could" is what's possible -- possible

Now, if you add this Be verb to "should", we get this particular thing. See, here's

the Be verb because Be is believe, remember? Your perspective; what you believe. "I should

+ be -- I believe this is right or probable." "You should be a better student. I believe

this. And I think it's possible -- probable or right. If you studied harder" -- by saying

"studied harder", I think this is what is probable or the correct thing. Right?

But "possible", which is similar, but not the same -- let's not forget -- it's what's

possible. "I believe this is possible." "I believe we could be the greatest nation on

Earth", says Obama. He should've said something else. Notice I didn't say "should be"; I said

So here, we've got what is possible versus what is probable. It seems simple and easy,

and it is. So why don't we just use one? And there's a reason for it. Remember, I said

this one has "probable" and "right"? And that's with "should"? Well, when people say "should"

in English -- like, "you should be" versus "could be" -- what is actually we think is

more accurate or more likely to happen. I'll give you an example. You're waiting for the

doctor. If the nurse comes out and says, "The doctor should be with you in five minutes."

Or the nurse comes out and says, "The doctor could be with you in five minutes." If you're

a native speaker, when she said, "The doctor should be with you in five minutes", you'll

go, "Okay. No problem." And you'll relax. If she comes out and says, "The doctor could

be with you in five minutes", you'll go, "Oh, damn. I'm here for another hour." Because

"could" means just possible. Maybe five; maybe ten. We don't know. When she said "should",

she's saying it's probable, and I believe this information is correct. Told you. Native

speaker time. Okay? You wouldn't know that difference. In the grammar books, they don't

point out it out that much because it's something we do when we interchange with each other

or exchange information. Right? We know "should" is much more accurate. Even though it's still

probable, it's not for sure. It's more accurate. While "could" is up there. Easy way to remember:

"should" has two. Two is more sure than one. And possible -- well, it's possible. It could

So why don't we do some examples? Just some quick ones. Are you ready?

Could be; should be. As I said, one has two things -- "should be" is more sure. "Could"

is possible. So let's go to a couple examples on the board and see how good you are since

Okay. "The game just went into overtime. It -- over at any moment." Well -- "overtime".

Let's just understand what "overtime" is. A game has 90 minutes. If the game goes to

91 or 92 minutes, it's overtime -- over the time we were told, okay? If you work overtime,

for instance -- you work eight hours. If you work 30 minutes or an hour, that's over your

work time. So now, the game is in overtime. Maybe the score is 0-0. No one has scored.

And it's overtime because you must have a score. Someone must win. So, "The game just

went into overtime. It -- something -- over at any moment." That's interesting.

And the second one is -- your mom. "Mr. E! Mr. E! Dinner -- something, something -- ready

So the first one is, "The game is in overtime." And the second one is, "Dinner -- ready in

five minutes." What do we do? Well, let's just imagine a game. Crowd's roaring. Everybody's

standing there, waiting. There's silence on the field. Now, it's possible that one goal

could end everything, but we don't know when that goal is going to happen. So it's not a sure

thing, right? Can you do that? Can you tell me how the game will end? If so, call me at

-- no. Don't call me. But what I'm saying is it's only possible. And when we talk about

possible, there are many things that could happen, and we think this one will happen.

So I'm going to go that "the game could be over at any moment." And that's true. It's

possible. It could be one minute or ten minutes or an hour.

Now, what about the second one? "Dinner -- ready in five minutes." Well, remember what we talked

about when we said "should"? "Should" is probable and right. It's more concrete, or we say much

more -- we can believe it more because "concrete" is solid. Because five minutes is a specific

time. It's not a guessing time. Right? And we believe this is true or right. So this

one would be "should be ready" because your mom actually thinks it might be four minutes,

but for sure, five minutes. So these are the answers here. "Could be" or "should be". And

to understand the thought I explained, remember, "could be" is possible. So when there are