Ability & Obligation
Modals are helper verbs that change the mood of a sentence. They show if you can do something or if you must do something.
Ability (Can / Could) 💪
Obligation (Must / Have to) 👮
Pick the Modal 🔄
Click the cards to see which Modal fits the context.
"Mustn't" and "Don't have to" are completely different!
Forbidden! Stop! ❌ (ហាមដាច់ខាត)
Relax. We provide it! ✅ (មិនចាំបាច់ទេ)
Quick Check ⚡
Mission 🎯
Mission 🎯
Mission 🎯
Video Lesson
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Recent Questions
Hi Vireak! For professional emails, "have to" sounds more natural and less aggressive. "Must" sounds very strict, like a firm order from a boss or a legal document. 📧
If "must not" means forbidden, what does "cannot" mean?
"Cannot" (or can't) means you physically do not have the ability, or something is impossible. "Must not" means you are ordered not to do it. 💡
Can we use "could" for the future? Like "We could go on a tour tomorrow".
Yes! While "could" is the past tense of "can" for ability, we also use "could" to suggest an idea or possibility for the future. Excellent point! 🚲
Is it better to use "must" or "have to" when writing emails to staff?