pLab 6 Grading Rubric Thanks for describing how you handled the extra parses with modifiers! It looks to me like -u marks not imperative, but irrealis, and that irrealis is used in the imperative construction along with other constructions. Semantically, according to Ginzburg and Sag, I think you'd find command_m_rels going with the imperative use and outcome_m_rels going with at least some of the other uses of the irrealis. Accordingly, you probably don't want to use imperative-clause with embedded clauses with irrealis form verbs (as you'll get command_m_rel from it). SENTENCE is probably redundant to MSG, but I think you'll continue to want something analogous to IMPER and QUES (but perhaps you can get away with a single feature FORM that takes values such as irrealis, interrog, etc.). This would canonically be a HEAD feature, though you might find it more convenient to make it a CAT feature.