Hey, this is Alex, and welcome tothis lesson on talking about necessity.
The word necessity basically means need,the need to do something.
So today we're going to talk about a coupleof different expressions to use when you need
to do something, okay,or when you don't need to do something.
So today we're going to look at have to,have got to, and must, okay.
So the first two, have got, sorry, have gotto, and have to are interchangeable in the
So you can say I, again, always begin withthe subject, so I, you, he, she, they, we.
You can also say, I have got to go home, meansI need to go home right now in the present,
okay.
And we're using just a differentsubject here, so I have, right, he has.
Now, when we're talking in the present, wecan use I have got, I have got to go home,
I have got to wear a sweater today,okay.
But when we want to speak in the futureor in the past, we cannot use have got to.
So I will have to wakeup at eight in the morning.
I had to wake upearly yesterday.
We cannot say Ihad got to wake up.
That is bad, bad, bad grammar.
So remember, if you want to be safe, I mean,the got to is really, really optional in this
case.
If you just like to be safe,just always say have to.
I will have to, I had to,I have to, okay.
So if you want to talk about it in the negativesense, like don't, we don't have to go to
So subject plus do not or doesn't, right,he doesn't, we don't, we don't have to go
And again, when you're talking about the negative,we also do not use have got to, we just use
So for example, I can't say wedon't have got to go to school.
It's only we don'thave to go to school.
We don't need to go to school.
We can listen on the internet,and that's good enough.
Okay, so when you want to form a questionusing have to, again, only have to, not have
Do plus the subject, do or does, right, doeshe, do we, do we have to plus the base form
Do we have to wearthese clothes today?
That's a bad example,but a funny one.
Okay, so finally, we've looked at have got,have got to, have to, now we must look at
must.
So, what is the differencebetween must and have to?
There really, really isn't a lot of differencebetween these two terms except when you use
them.
So, you must try harder, okay.
Have to is veryinformal language.
Have to you canuse in the classroom.
You can use it with your friends, withyour family, even with the people at work.
Must you would use in writing,okay.
In writing or it can be used by a personwho is in a position of power, okay.
So, like the president or the prime ministerof a country would use the term must, okay.
So, we must lower taxes, okay.
It's more formal in sayingwe have to lower taxes.
It has a much stronger,more formal meaning.
So, you must try harder, okay.
And must, just as a refresher, can only,only, only be used in the present form.
So, you cannot say I will must try harder, youwill must try harder, I musted tried harder.
No, only, only,only in the present, okay.
So, you must try harder, I must try harder,we must try harder, okay.
So, if you'd like to test your understandingof talking about necessity, about having to
do something, okay, about you, you know, aboutusing must, have to, and have got to, please