samson-roberds documents

I – MODALS II - PAST MODALS. MODALS - I Must Mustn't Have to Don't have to Ought to Should Shoudn't Need to Needn't Obligation? Necessity? prohibition?
Documents I – MODALS II - PAST MODALS. MODALS - I Must Mustn't Have to Don't have to Ought to Should Shoudn't Need to Needn't Obligation? Necessity? prohibition?