Azar 7 9 expressing necessity

1. 7-9 Expressing Necessity: Have
to, Have Got to, Must
Page 193

2. They express the the idea that
something is necessary.
I have a very important test tomorrow. I have
to study tonight.
=
I have a very important test tomorrow. I have
got to study tonight.
=
I have a very important test tomorrow. I must
study tonight.
Haveto,havegotto
andmusthave
basicallythesame
meaning.

3. Forms of do are used with have to
in questions.
Do we have to bring pencils to the test?
Why did he have to leave so early?
Havetoisusedin
questions,butnot
mustorhavegotto.

4. I had to study last night.
ThePASTformof
haveto,havegotto
andmustishadto.