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Beginner 📝 Grammar
Modal verbs: can, should, must
Modals are helper verbs that change the meaning: can = ability or permission, should = advice, must / have to = necessity, could / may = polite requests..
1What is it?
Modals are helper verbs that change the meaning: can = ability or permission, should = advice, must / have to = necessity, could / may = polite requests.
2Why do we use it?
Polite English is built on modals. Can you help me? You should see a doctor. I have to leave early.
3The simple rule
Modal + base verb. No -s, no to (except have to). Negatives: can’t, shouldn’t, mustn’t / don’t have to.
4Formula
subject + can / could / should / must / may + base verb
5Easy examples
I can swim.Ability
You should rest.Advice
We must go.Necessity
Can I sit here?Permission
6Everyday examples
Could you pass the salt?Polite request
You shouldn’t skip breakfast.
I have to finish this today.
You don’t have to come if you’re busy.No obligation
7Kerala and India examples
Can you speak Tamil?
You should try the fish curry here.
We must reach the station before 6.
Could you tell me where the KSRTC stand is?
8Common mistakes
She can sings.
She can sing.
Why: After a modal → base verb.
I must to go.
I must go. / I have to go.
Why: Must never takes to.
You mustn’t come tomorrow (meaning: not necessary).
You don’t have to come tomorrow.
Why: Mustn’t = forbidden. Don’t have to = not necessary.
9Practice quiz
Question 1 of 4Multiple choice
You ___ drink more water.
10Speaking challenge
Speaking challenge
Give your younger cousin 5 pieces of advice using should / shouldn’t. Then say 3 things you can do well.
0:30
Say it out loud. Nobody is listening — that’s the point. Mistakes are allowed.
Finish this lesson
Do the practice quiz above, then mark it complete.