In the analysis of Hare's The Language of Morals (1952), the phrastic is the aspect of a sentence that is common to different moods: between ‘the door is shut’, ‘shut the door’, ‘is the door shut?’, and ‘would that the door were shut!’ we can isolate the common content of ‘the door being shut’, to which are added the various neustics or mood indicators giving the indicative assertion, the imperative, and so on.
Philosophy dictionary. Academic. 2011.