Modals verbs are different from normal English verbs. We use modal verbs to express different meanings and reach different purposes.
Modal verbs do not take an ‘s‘ for the third person singular.
She musts walk her home everyday. ❌ (wrong)
She must walk her home everyday.✔️ (correct)
After ‘can’, ‘could’, ‘may’, ‘might’, ‘shall’, ‘should’, ‘ought to’, ‘will’, ‘would’, ‘must’,‘have to’, we use a bare infinitive (i.e. an infinitive without ‘to’).
We do NOT use a past form of a verb nor an -ing form.
I could to swim when I was nine.❌ (wrong)
I could swim when I was nine.✔️ (correct)
The infinitive can be active. When necessary, it can be passive.
The robbers may be caught soon.
Your money may be found soon.
I think this radio can be repaired.
Check modal verbs list down below with exercises and free PDF.
Ability: Birds can fly. I can swim
Permission: Yes, you can go to the cinema.
He could ride my car, if he let me know earlier.
Permission: You may see your friends now.
Possibility: It may snow tomorrow.
She might be really sick.
Future actions: We shall visit again next time.
Responsibility: They should bring their books to school.
You ought to ask for your father’s permission.
Future Actions: She will join our team next month.
Imagination: I would call Mary if I remember her number.
Necessity: Human must eat.
Obligation: You must hand in your homework on time.
I have to help my mother tomorrow.
👉Modal verbs are always used in making requests, offers, permission and invitations.
Requests: Can you give me some water?
Asking people to do things: Could you wait her for a while?
Offering: Can I help you?
Offering/Inviting: Would you like a cup of tea?
Can I speak to Mohammad, please?
Could I ride your bike?
May I come in? (more formal/polite)
You can download more detailed modal verbs, exercises, examples free PDF down below.