The document discusses the use of "going to" to express future actions and provides examples of its use with different subjects, including "I", "they", "we", "you", "he", "she", and "it". It explains that the structure is Subject + To be (am/are/is) + Going to + Verb + Object/Compliment and provides sample sentences like "I am going to play basketball" and "They (Mr. X and Mrs. X) are going to play basketball". It aims to illustrate how "going to" can be used to talk about different subjects' future plans or actions.