Yes, it is a fragment.
Yes it is a fragment
Do you work? is a complete sentence; it is not a sentence fragment.
Yes, that is correct. A fragment is an incomplete sentence that does not express a complete thought. So, even if you punctuate a fragment like a sentence, it remains a fragment because it lacks a subject, verb, or complete meaning.
Yes
Yes
Yes.
Yes.
No, it is not a complete sentence. It is a fragment.
Yes, "because I said so" is a dependent clause. By itself it is a fragment.
Yes, if it doesn't have a predicate, it doesn't qualify as a sentence, only a fragment.
Yes, "The man that I saw yesterday" is a sentence fragment. It lacks a complete thought or predicate.