Modal verbs are special verbs that express ideas like possibility, intention, obligation and necessity. Unlike regular verbs, modal verbs only exist in their helping form, cannot act as the main verb, and have consistent forms without conjugation. Some common modal verbs are can, could, be able to, must, have to, and should. Each modal verb has specific meanings and uses when expressing abilities, possibilities, necessities, recommendations, and certainties.

2. Modal verbs are special verbs which behave very
differently from normal verbs. Unlike other auxiliary
verbs modals only exist in their helping form; they
cannot act alone as the main verb in a sentence. Modal
verbs are used to express ideas such as possibility,
intention, obligation and necessity.
WHAT ARE MODAL VERBS?WHAT ARE MODAL VERBS?

3. A modal verb always has the
same form:
There is no past form (-ed), no
present participle (-ing) and no
3rd persons singular (-s).
Modal verbs come before the
subject in questions:
example: "May I come to your
house for tea?"
Negative forms:
Modal verbs have n't or not after
them in the negative.
example: "mustn't" - "needn't".
Some basic characteristicsSome basic characteristics
of modals:of modals:

4. We use “can” to say that someone has the ability or
opportunity to do something:
e.g.1Can you speak English fluently?
e.g.2It’s nice tonight. We can go
for a swim.
CANCAN

5. “Could” is the past tense of can. It is also more polite.
It is less sure.
e.g.1Could you do me a favor?
e.g.2I could swim 10 km continuously when I was
young.
COULDCOULD

6. “Be able to” is possible instead of “can” and can be
conjugated as a regular verb.
It is a more formal than “can”
e.g. It’s nice that he was able to
pass so well in the Exam.
BE ABLE TOBE ABLE TO

7. "Must" is most commonly used to express certainty.
It can also be used to express necessity or strong
recommendation, although native speakers prefer
the more flexible form "have to." "Must not" can be
used to prohibit actions, but this sounds very severe.
MUSTMUST

8. •This must be the right address! certainty
•Students must pass an entrance
examination to study at this school.
necessity
•You must take some medicine for that
cough. strong recommendation
•Jenny, you must not play in the street!
prohibition
Examples:Examples:

9. "Have to" is used to express certainty, necessity, and
obligation.
Examples:
This answer has to be correct. certainty
The soup has to be stirred continuously to prevent
burning. necessity
They have to leave early. obligation
HAVE TOHAVE TO

10. : "Do not have to" vs. "Must not“Do not have to" vs. "Must not“
"Do not have to" suggests that someone is not
required to do something. "Must not" suggests that
you are prohibited from doing something.
Examples:
You must not eat that. It is forbidden, it is not
allowed.
You don't have to eat that. You can if you want
to, but it is not necessary.

11. "Should" is most commonly used to make
recommendations or give advice. It can also be used
to express obligation as well as expectation.
Examples:
When you go to Berlin, you should visit the palaces
in Potsdam. recommendation
You should focus more on your family and less on
work. advice
SHOULDSHOULD

12. DO YOU KNOW THEM NOW?DO YOU KNOW THEM NOW?

13. REFERENCES
http://es.slideshare.net/cacgp/modal-
verbs118a

15. I am going to finishI am going to finish
the universitythe university

16. I am going toI am going to GetGet
marriedmarried

17. I am going to Get a Job in myI am going to Get a Job in my
areaarea

18. I am going to Visit San AndresI am going to Visit San Andres

19. I am going to enjoy a good timeI am going to enjoy a good time
with all my familywith all my family