In other words, a clause marked [+inv] consists of an ancillary contract followed by a vice-president. (In a more detailed grammar, we should impose some restrictions on the form of the vice president, depending on the choice of tool.) (44) illustrates the structure of a reverse clause. In English, nouns are usually marked as singular or plural. The form of the demonstrative also varies: this one (singular) and this one (plural). Examples (1b) and (2b) show that there are restrictions on the use of demonstratives and nouns within a substantive sentence: either both are singular or both are plural. A similar restriction applies between subjects and predicates: inverted sentences – where the order of the subject and verb are reversed – occur in English interrogatives and even after “negative” adverbians: ☼ What are the limitations necessary for word sequences like I am happy and she is happy but not *you is happy or *they am happy? Implement two solutions for the verb presensing paradigm in English, first taking grammar (8) as the starting point, then grammar (20) as the starting point. In addition to atomically evaluated features, features can accept values that are themselves feature structures. For example, we can group the characteristics of the agreement (for example.B. person, number, and gender) as a defined part of a category grouped in value agr. In this case, we say that the AGR has a complex value. (18) represents the structure in a format called an attribute matrix (AVM). An alternative treatment of subclassification, originally due to a framework known as categorical grammar, is represented in frameworks based on features such as PATR and Head-driven Expression Structure Grammar.

Instead of using subcat values to index productions, the subcat value directly encodes the value of a head (the list of arguments with which it can be combined). For example, a verb such as Put, which takes np and PP complements (put the book on the table) could be presented as (33): Let`s see what happens when we code these concordance limitations in a grammar without context. We start with the simple CFG in (7). Finally, a sentence is a kind of verbal category that has no requirements for other arguments and therefore has a SUBCAT whose value is the empty list. The tree (35 years old) shows how these category classifications combine in an analysis by Kim that puts the book on the table. The grammar of 9.5 illustrates the interaction between correspondence (consisting of person, number, and gender) with the case. ◑ Extend German grammar to 9.5 so that it can cope with so-called verb-second structures like the following: Features structures are quite powerful, but the way we have manipulated them is extremely ad hoc…