Relative Clauses: Dependent clause that begins with a relative pronoun. The person who guesses the pigs weight correctly would get to keep him. Elliptical Clauses: Adverb clauses in which part of the clause is omitted. While fighting with Mabel, Dipper managed to shrink himself. Essential Clauses: Clauses necessary to the meaning of the sentence. The video game character that Dipper favors most ,was Rumble McSkirmish. Nonessential Clauses: Clauses that are NOT necessary to the meaning of the sentence. Summerween is Gravity Falls version of summer halloween, which begins 4 months before actual Halloween.