Модаль: хэрэгтэй, болно
Look at these examples. Can you spot the grammar pattern?
Орж болохгүй.
You may not enter. / Entry is prohibited.
Явах хэрэгтэй.
I must go. / It is necessary to go.
Энд суух болно.
You may sit here.
Pay attention to the highlighted parts. What do they have in common?
Модаль: хэрэгтэй, болно
хэрэгтэй (must/need): verb-infinitive (-х) + хэрэгтэй
болно (may/OK/can): verb-infinitive + болно
Common Error Patterns
Using wrong form before хэрэгтэй/болно (e.g., *явж хэрэгтэй instead of явах хэрэгтэй).
Incorrectly negating болно (e.g., *болно биш instead of болохгүй).
Орж болохгүй.
You may not enter. / Entry is prohibited.
болохгүй = negation of болно — prohibition.
Явах хэрэгтэй.
I must go. / It is necessary to go.
Infinitive (-х) + хэрэгтэй = necessity. Subject is often omitted.
Энд суух болно.
You may sit here.
болно after infinitive = permission or possibility.
Practice in course
Apply this grammar in A1 course exercises