SQ â ´ Inverted yes/no question, or main clause of a wh-question, following the wh-phrase in SBARQ. (Bies et al. 1995) SQ|That part of an SBARQ that excludes the wh-word or wh-phrase. See Section 5.32. (Santorini 1991) The SBARQ label marks wh-questions (i.e., those that contain a gap and therefore require a trace). A further level of structure, SQ, contains the inverted auxiliary (if there is one) and the rest of the sentence. The inverted auxiliary in wh-questions is not labeled. ... SQ (See also section 1.2.7.) â ¢ inside SBARQ: As described above, inside wh-questions, SQ holds the subject, inverted auxiliary (if any), main verb phrase, and some adjuncts. â ¢ yes/no questions: SQ is used for yes/no questions (i.e., those with inversion but no wh-movement). ... â ¢ subject-less yes/no questions: In questions where the auxiliary and subject do not appear, the auxiliary is unlabeled and a null subject (NP-SBJ *) is used. ... Note that questions with overt subjects and auxiliaries that show declarative word order are simply labeled S. â ¢ Tag questions: Tag questions are treated as an adjunction of SQ to S. The resulting structure is labeled SQ, since the whole thing is interrogative in nature. The lower SQ is annotated to show predicate deletion; that is, an appropriate null *?* is inserted. (Bies et al. 1995)