The Sentence Diagram Generator visually represents the sentence "I went to the store to get a carton of milk" using a Reed-Kellogg diagram. The main components of the diagram include:

1. Subject: "I"
2. Verb: "went"
3. Prepositional Phrase: "to the store"
   • Preposition: "to"
   • Object of the Preposition: "store"
4. Infinitive Phrase: "to get a carton of milk"
   • Infinitive: "to get"
   • Direct Object: "carton"
   • Prepositional Phrase: "of milk"
     • Preposition: "of"
     • Object of the Preposition: "milk"

This structure illustrates the relationships between the components of the sentence, highlighting the main action and its modifiers.