Sentence:  As far as the <WSD>jussive</WSD> goes — ignoring the very few occurrences of this in first person — it can be noted that most of the second-person <WSD>jussives</WSD> are in negative commands. 
Meaning of the word marked with <WSD> tags:  The jussive mood, a verb inflection used to indicate a command, permission or agreement with a request; an instance of a verb so inflected.