What type of sentence starts with why?
Interrogative
An interrogative sentence asks a question. This sentence might begin with words, such as who, what, where, when or why. It ends with a question mark.
What words do you not start a sentence with?
Never begin a sentence—or a clause—with also. Teach the elimination of but, so, and, because, at the beginning of a sentence. A sentence should not commence with the conjunctions and, for, or however....
When a sentence starts with why is it a question?
Question words like who, when, where, why, what, which, and how indicate that a sentence is a question. If your sentence begins with one of those words, then it is most likely a question and should be ended with a question mark.
Why do people say why before a sentence?
In this form, the word “why” is being used as an interjection. It has no interrogatory meaning but does suggest that the speaker was not expecting whatever they are reacting to, in this case something that made them feel grateful. “Why, I never!” is another example of this usage.