A type of clause recognized in some models of grammatical description (e.g. Quirk Grammar), in which the verb is omitted (and often the subject as well), e.g. When ready, we waited for the signal, Stay at home if possible. Some classical transformational models of analysis would derive such structures using a process of deletion. In later generative studies such constructions have been analysed as base-generated - a type of small clause.
有些語法描寫模型承認的一類小句（如夸克語法），其中動詞被省略（主語也常省去），例如When ready, we waited for the signal“準備好后我們等信號的發出”，Stay at home if possible“如有可能盡量呆在家里”。一些傳統轉換語法模型用刪除來派生這類結構。后來的生成語法將這些構式分析為由基礎生成的構式—一類小小句。