Hi, this is Kee from BBC Learning English.
Today, I'm going to tell you the differences
between must and have to.
Both must and have to talk about obligations.
However!
Now, we use have to when we talk about obligations
others decide for us.
It's a law or a rule, so it cannot be changed.
For example: At BBC,
we have to show our passes to enter the building.
This is a rule decided by the BBC.
On the other hand,
we use must when we talk about obligations
we decide for ourselves or others.
For example, my boss might say to me:
You must be more organised.
Or, I might say to myself:
I must exercise more often.