LEVEL 5 GRAMMAR, MAY 23RD, 2017

We continued this week talking about obligation and permission.

Obligation
have to
must
be obligatory
be compulsory

 Prohibition
must not
cannot
Not be allowed to

No obligation
don't have to

Permission
can
can't/cannot
be allowed to
may



we pointed out the difference between Have to and Must
Have to: for external rules - "In my job, I have to wear a uniform"
Must: for internal obligation - "My shoes are old; I must get some new ones."
Though usually they are used in a similar fashion
Also:
I have to = I must (more or less)
But....
"I don't have to" is not the same as "I must not"
- I don't have to sleep on the plane, though I can if I want.
- I must not take a gun on board the plane.

We also practiced "Be allowed to"
You are not allowed to smoke on a plane.
In school we were allowed to wear makeup, but we were not allowed to smoke.

Then we looked at talking about this area in the past....

PRESENT
PAST
I have to
I must
I had to
I am allowed to
We are allowed to
I was allowed to
We were allowed to
I can
We can
I could
We could
I don’t have to
I didn’t have to



When we were in school, we had to wear a uniform. We weren't allowed to smoke, but we could wear makeup. We didn't have to study science.

For homework, we had no.1 and no.4, p.105.








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