Explanation: Adverb clauses can be placed at the beginning, middle or end of a sentence. When placed at the beginning or in the middle, they require a comma to offset them from the rest of the sentence: Whether you like it or not, you have to go.
You may sit where you like. In this sentence, the clause 'where you like' is an adverb-clause. He fled where his pursuers could not follow. 'Where his pursuers could not follow' is the adverb-clause.
