The document discusses various techniques for combining sentences, including using key words, phrases, compound subjects/verbs, and longer sentence structures. Some examples provided are combining sentences with adjectives like "Kelly's beaded necklace sparkles", with adverbs as in "Tomorrow I am going to a sleepover", and using phrases such as "Mrs. Brown, our next-door neighbor, makes the best cookies on the block." The techniques of combining sentences can make writing more detailed and cohesive.