1. I may visit you tomorrow
Modal
I may visit you tomorrow
Subject
VERB

2. Modals
Must, May, Can, Can’t

3. Must May Can Can’t (cannot)
Modal Verbs
Must
May
Can
Can’t (cannot)
must
may
shall
will
can
could
would
should
might

4. You didn’t sleep last night. You must be really tired now.
His leg is broken, it must hurt really bad.
We use “Must”:
When we are sure/certain about something

5. Teacher: Why is Ahmed absent?.
May:
Teacher: Why is Ahmed absent?.
Student: I don’t know. He may have a fever.
We use “may”:
When we are not sure about something

6. I can open the door because I have the key.
We use “Can”:
When we talk about something possible

7. I can’t open the door because I don’t have the key.
We use “Can’t”:
When we talk about something impossible

8. Some Basic Rules 1- usually come before another verb:
Modal verbs:
1- usually come before another verb:
I must go to the library now.
2- are used with the infinitive but without the ‘to’
He can read French.
And not :
He can to read French.

9. 1. Must: When we are sure/certain about something
Form:
You must be tired:
Subject + Modal + Verb (base form) + …
Use:
1. Must: When we are sure/certain about something
-> You didn’t eat your breakfast. You must be hungry
2. May: When we are not sure about something
-> I don’t know where he is. He may be in the Kitchen
3. Can: When we talk about something possible
-> I can open the door because I have the key.
3. Can’t: When we talk about something impossible
-> I can’t see without my glasses

10. Fill in the gap with “must”, “can”, “can’t” or “may”
He has been studying English for five years. He ________speak English very well now
I'm not sure, but he _________ be absent tomorrow
This restaurant ________ be a good one; it’s always empty.
He injured his leg while playing football; his parents _______ be worried
My brother is a mechanic, he _______ fix your car.
There are some clouds in the sky, it __________ rain tomorrow
I eat a whole chicken by myself, I’m full and I _______ eat anymore
You have been working all day long, You _____ be very tired
You ________ have a good mark in the exam without studying.
This jacket isn’t good quality; it ______ be very expensive