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Reading: The Future of Work Understanding Accents and Dialects Countable and Uncountable Nouns The Present Perfect Tense Phrasal Verbs: Top 30 Health and Medicine Vocabulary Listening Strategies for Podcasts Job Interview English Writing a Formal Letter First and Second Conditional Modal Verbs: Should, Must, Might Environment and Nature Vocabulary
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Lessons Grammar
⚖️

Modal Verbs: Should, Must, Might

Grammar Intermediate ~2 min

Use should, must, and might correctly to give advice, express obligation, and talk about possibilities in real conversations.

📖 Lesson

What You Will Learn

You'll master three essential modal verbs that native speakers use constantly — understanding when to use each one and why it matters for how you sound in English.

Explanation

Modal verbs don't work like regular verbs. They express ideas like obligation, advice, and possibility rather than simple actions.

MUST = strong obligation or certainty
- Use this when something is required or you're very sure about something
- "I must finish this project by Friday" (my boss requires it)
- "You must be tired" (I'm certain you are)

SHOULD = advice or mild obligation
- Use this for recommendations or what you think is the right thing to do
- "You should see a doctor about that cough" (my suggestion, not a command)
- "We should leave soon" (it's probably a good idea)
- Notice: should NOT for must not — that's a different meaning

MIGHT = possibility or uncertainty
- Use this when something could happen but you're not sure
- "It might rain tomorrow" (maybe, maybe not)
- "She might join us later" (possibly, but I'm not certain)
- "You might want to bring an umbrella" (it's a suggestion about something possible)

Examples

Real conversations:
- Job interview: "I think you should highlight your team projects more."
- WhatsApp to friend: "You must try that new coffee shop downtown!"
- Weather chat: "It might be cold this weekend. You might need a jacket."
- Parent to student: "You really should start studying now, not the night before."
- Meeting: "We must submit the report by Thursday, or we might lose the client."

Common Mistakes

❌ "You must not do that!" (confusion — this means forbidden, not advice)
✅ "You shouldn't do that" or "You shouldn't have done that"

❌ "I might to go" or "I might go to" (wrong structure)
✅ "I might go" (no 'to' after might)

❌ "He musts do it" (modals never add -s)
✅ "He must do it"

Quick Tips

  • MUST is strongest, SHOULD is gentler, MIGHT is weakest
  • All three work the same way: modal + base verb (no -ing, no -ed)
  • Use MIGHT when you're making a suggestion that sounds optional
  • Use SHOULD when someone asks for your opinion
  • Use MUST when talking about rules or urgent matters
Follow Along reads paragraph by paragraph with highlighting. Hover underlined words for quick definitions.

🃏 Key Vocabulary — tap to flip

11 words
should
/ʃʊd/
Intermediate
Tap to see definition →
Definition
Modal verb expressing advice, recommendations, or what you think is the right thing to do
"You should eat breakfast before your exam."
Tap to flip back
must
/mʌst/
Intermediate
Tap to see definition →
Definition
Modal verb expressing obligation, necessity, or something that is required or forbidden
"You must arrive on time for your flight."
Tap to flip back
might
/maɪt/
Intermediate
Tap to see definition →
Definition
Modal verb expressing possibility or uncertainty about something that could happen
"It might rain tomorrow, so bring an umbrella."
Tap to flip back
obligation
/ˌɒblɪˈɡeɪʃən/
Intermediate
Tap to see definition →
Definition
Something you must do because of rules, duty, or requirement; a responsibility
"Your main obligation is to finish the project by Friday."
Tap to flip back
prohibition
/ˌprəʊhɪˈbɪʃən/
Intermediate
Tap to see definition →
Definition
An official rule or law that forbids something; something that is not allowed
"There is a prohibition against smoking in the hospital."
Tap to flip back
possibility
/ˌpɒsəˈbɪləti/
Intermediate
Tap to see definition →
Definition
The chance that something could happen or be true; something that might occur
"There is a possibility that the store might close early."
Tap to flip back
necessity
/nəˈsɛsɪti/
Intermediate
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Definition
Something that is absolutely needed or required; something you cannot do without
"Food and shelter are basic necessities for human survival."
Tap to flip back
recommendation
/ˌrekəmenˈdeɪʃən/
Intermediate
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Definition
A suggestion that something is good, useful, or worth trying based on experience
"My doctor gave me a recommendation to exercise three times a week."
Tap to flip back
uncertainty
/ʌnˈsɜːrtənti/
Intermediate
Tap to see definition →
Definition
The state of not being sure or confident about something; doubt or lack of certainty
"There's some uncertainty about whether the meeting will happen tomorrow."
Tap to flip back
certainty
/ˈsɜrtnti/
Intermediate
Tap to see definition →
Definition
The state of being sure or certain about something.
"She speaks with certainty about the plan, so she must know it well."
Tap to flip back
forbidden
/fərˈbɪdən/
Intermediate
Tap to see definition →
Definition
Not allowed; prohibited by rules or law.
"Smoking is forbidden in this office building."
Tap to flip back

✏️ Fill in the Blank

Type the missing word to complete each sentence.

You ___ eat breakfast before your exam.
You ___ arrive on time for your flight.
It ___ rain tomorrow, so bring an umbrella.
Your main ___ is to finish the project by Friday.
There is a ___ against smoking in the hospital.

✅ Check Your Understanding

Quick Check
3 questions · no login needed

1. Which modal verb should you use to give advice or a recommendation?

2. What is the correct form of this sentence? 'I _____ go to the store tomorrow.'

3. Which sentence correctly uses 'must' to express strong obligation or necessity?

🧠 Practice Quizzes

Test Your Knowledge: Modal Verbs: Should, Must, Might
5 questions · 10 min
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