What is a clausal sentence starter?

A clausal sentence starter is a Word or phrase that introduces a dependent clause, which cannot stand alone as a complete sentence. Common examples include subordinating conjunctions like "although," "because," "if," and "when." These starters set up a relationship between the dependent clause and the main clause, providing context or conditions for the main idea. For instance, in the sentence "Although it was raining, we went for a walk," "Although it was raining" is the clausal starter.