Imagine you’re talking to someone in English and want to politely give advice, express what you’re able to do, or say something is necessary. How do you say it naturally? That’s where modal verbs come in — little helpers that make your speech sound natural, modern, and truly English. Especially three of them: can, must, and should. These are some of the most commonly used verbs in everyday conversations among native speakers.
What are modal verbs?
Modal verbs are auxiliary verbs that give the main verb extra meaning — such as ability, obligation, advice, or permission. They don’t change depending on the subject and don’t have typical past or future forms like regular verbs do.
Each modal verb serves to express the speaker’s attitude. You’re not just doing something — you’re saying whether you can do it, must do it, or should do it. That’s why it’s so important for young learners to get comfortable with them — this is about real communication, not memorizing boring textbook phrases.
Can — for ability and permission
The modal verb can is most often used to talk about physical or mental ability and also about permission.
🔹 I can swim. — I know how to swim.
🔹 Can you help me? — Are you able to help me?
🔹 You can leave your bag here. — You are allowed to leave it here.
Can is extremely common — you’ll hear it everywhere, from coffee shops to lectures. It’s important to understand its meaning in context rather than always translating it literally.
Must — for obligation and necessity
The modal verb must expresses strong obligation or necessity. It’s more intense than just “have to” — it means something really has to be done.
🔹 You must wear a seatbelt. — It’s required.
🔹 I must finish this project today. — I have no other choice.
🔹 Must we bring our passports? — Is it necessary?
In everyday conversations, must is often replaced with have to, but it’s still good to know both. Must sounds more serious or formal — often used in rules or official instructions.
Should — for advice and recommendations
Should is used when giving advice, making recommendations, or expressing expectations.
🔹 You should try this dessert! — I recommend it.
🔹 He should be here by now. — I expect him already.
🔹 Should I call her? — Do you think it’s a good idea?
Should is a softer version of must, and it’s very common in friendly conversations when we want to offer suggestions without pressure.
| Modal Verb | Meaning | Example |
|---|---|---|
| Can | Ability, permission | I can speak Spanish. |
| Must | Obligation, necessity | You must wear a uniform. |
| Should | Advice, recommendation | You should drink more water. |
How does it work in real life?
Imagine you’re at a concert with a friend:
– Can we get in without tickets?
– No, we must buy them online.
– Okay… Do you think we should stay for the afterparty?
Three modal verbs in one short dialogue — and that’s how they work: not in grammar books, but in real-life conversations.
Mini-habit: Start using them today
To get comfortable with modal verbs, try this: come up with three sentences using can, must, and should. Say them out loud. Then try using at least one of them during a real conversation this week. Whether you’re chatting with a friend, sending a message, or thinking out loud — let these verbs become part of your active vocabulary.
Can, must, should — this isn’t just grammar. It’s part of your personal English. They help you speak clearly, give advice, ask for permission, or express your plans. If you want to sound confident and natural — learn to hear, understand, and use them every day.
Practice Exercises
Exercise 1. Fill in the blanks with the correct modal verb (can, must, should):
- You ___ see this movie — it’s amazing!
- I ___ finish my homework before I go out.
- ___ you help me with this suitcase?
- You ___ drink more water.
- We ___ be quiet in the library.
Exercise 2. Make your own examples with each modal verb
- Can:
- Must:
- Should:
Answers:
Exercise 1
- should
- must
- Can
- should
- must
Exercise 2
(Examples will vary — here are sample answers):
- Can: I can ride a bike.
- Must: You must wear a helmet.
- Should: We should study more before the test.
