In the sentence "Reading the newspaper, he sat in the garden," let's identify the subjects, complement, and main verb:
Subject: The subject in this sentence is "he." It refers to a person who is performing the action.
Complement: There is no direct complement in this sentence. However, we can consider "reading the newspaper" as a participial phrase that functions as an adverbial phrase, providing additional information about the action of "he."
Main Verb: The main verb in this sentence is "sat." It represents the action that "he" is performing.
Complement: reading the newspaper (adverbial phrase)
Main Verb: sat