Conjunctive adverbs are words that connect independent clauses while also showing the relationship between them. Common examples include however, therefore, moreover, and consequently. They help clarify the flow of ideas in a sentence, indicating contrast, addition, or cause and effect. When using conjunctive adverbs, a semicolon is typically placed before the adverb, and a comma follows it. For instance, in the sentence "I wanted to go for a walk; however, it started to rain," the conjunctive adverb however shows a contrast between the desire to walk and the reality of the rain.