Understanding and executing a declarative sentence involving a forms-of-be verb

An important criterion for any artificial intelligence program is its capability to communicate with the external world. One common form of communication is by the use of a natural language, specifically English. When provided a sentence, it is important for the program to understand the intention of the given sentence, which is a significant first step for a program to perform logical reasoning. In this paper, we discuss two components of the grammar that affects the understanding of a sentence: role and control. These two components represent the knowledge that teaches how to use the language to express a thought. We describe in detail what needs to be learned for each of these components for three major grammar terms: noun phrase, declarative sentence, and forms-of-be verb. We then show how to use them to create a declarative thought corresponding to a given declarative sentence that uses a forms-of-be verb. Finally, we show what needs to be learned by the program so that the declarative thought can be understood precisely based on the exact subject and predicate in the given sentence. Object-Oriented paradigm is used to analyze the problem and design the solution to attack the problem.