Likelihood
High: must, can't
Mid: ought to, shouldn't
Low: may, may not
Deductions and Predictions
Predictions: will, should, won't
Deductions: may, might, could
Requirement
High: must, must not
Mid: should, should not
Low: can, don't have to
Other Areas
Frequency
Inclination: khuynh hướng
Potentiality
Ability