The Sentence Diagram Generator visually represents the grammatical structure of the sentence: "You will want professional lessons before kayaking in the ocean."

1. Subject: You
2. Verb Phrase: will want
   • Main Verb: want
   • Modal Verb: will
3. Direct Object: professional lessons
   • Adjective: professional
4. Adverbial Clause: before kayaking in the ocean
   • Preposition: before
   • Gerund: kayaking
   • Prepositional Phrase: in the ocean
     • Preposition: in
     • Object of the Preposition: ocean

This structure highlights the relationships between the components of the sentence, aiding in understanding its grammatical composition.