2. MUST
… express a strong “personal-internal obligation”.It
means that it comes inside and the speaker almost
certainly agrees with the obligation.
I must go to bed earlier.
*Here, speaker believes that going to bed
earlier is a good choice. Nobody forces the
speaker to go to bed earlier.
3. HAVE TO
… expresses a strong “external obligation”. It
means that it comes from outside, from a kind of
authority.
My boss is very strict. I have to arrive at
work at 9 sharp.
*Here, arriving at work is not what the
speaker believes or thinks as the right
choice. His boss forces him to be at work
on time.
4. What is the difference
between the sentences
below?
1. I must stay at school after the
classes for extra studies.
2. I have to stay at school after the
classes for extra studies.
5. Let’s try some.
1.They need this report urgently.
I ……………… finish it now.
2.I ……………… arrive early every morning.
Because I like to start working early in the
morning .
3.Jim ……………… go to work on foot. He
thinks walking to work every morning is
healthier.
4.She …………… answer the phone.That's her
job.
have to
must
must
has to
6. 5."You ……………… do your homework" said the
teacher.
6."We ……………… invite the Smiths for dinner one
day" said my wife.
7.Tom ……………… leave home at 7.30 to get to
school at 9.
8."I ……………… hurry or I'll miss my bus!"
9.You ……………… attend all personnel meetings - it's
written in your contract.
10."I ……………… call my sister - it's her birthday
today."
have to
must
has to
have to
have to
have to
8. MUSTN’T
...expresses that something or doing
something is forbidden.It means
prohibition.
Students mustn’t drink coffee during
the lesson.
We mustn’t talk about it.It is a
secret.
9. DON’T HAVE TO
… expresses that there is no obligation or
necessity.It means doing something is not
necessary. 'Don't have to' expresses something
that is not required. However, if the person may
choose to do so if he or she wants.
I don’t have to study for the university
exam.Because I have already graduated
from one.
10. What is the difference
between the sentences
below?
* She has to write a report of the
meeting.
* She doesn’t have to write a report
of the meeting.
Because she is the secretary and
this is her job.
But she can do if she
wants.
11. CORRECT THE
MISTAKES
• Children don't have to play with fire.
• I must go to work every day.
• It's my job! She doesn't have to go to that meeting. She'll
ruin it!
• Have you to go to classes on Thursday?
• She hasn't to do homework next week.
• I'll must hurry up if I don't want to miss the bus.
• You mustn't come if you don't want to meet him. I just
thought it would be a good idea.
• My daughter isn't having to attend class this afternoon.
• I has to help him every day at work.
12. Let’s Do the Quiz!
http://www.englishclub.com/grammar/verb
s-modals-have-to-must-not-quiz.htm
http://www.englishgrammarsecrets.com/m
usthaveto/exercise7.html
http://www.eclecticenglish.com/grammar/H
aveTo1A.html
