Conjunctions: These connect two or more units of words, phrases, or clauses together.Coordinating conjunctions: These connect two or more units of a language that are equal within a sentence. There are seven main coordinating conjunctions. These are: for, and, nor, but, or, yet, soYou are able to coordinate both verbs and nouns with "and" as well as "or"."I'm swimming and chewing gum." (verbs)"Do you have a pencil and paper?" (nouns)Subordinating conjunctions: These connect two or more clauses and form complex sentences, which have at least one independent and one or more dependent ones."Upon completing my PhD in Psychology, I immigrated to China to start a new life."The beginning is an independent statement, whereas the second one is dependent upon the first to make sense.