Though, if, as, and when are examples of which type of conjunction?

The terms "though," "if," "as," and "when" are classified as subordinating conjunctions because they introduce a dependent clause, which requires an independent clause to form a complete sentence. Subordinating conjunctions connect a subordinate clause to a main clause, establishing a relationship between the two. For instance, in the sentence "If it rains, we will stay inside," "if" introduces the condition of the dependent clause, which cannot stand alone. This creates a hierarchy where the independent clause relies on the subordinating conjunction to provide context, which is a key characteristic of subordinating conjunctions. Thus, this choice aligns perfectly with the function these words serve in constructing complex sentences.