The next answer to really is really.

Really is a general question, while our direct answer is a declarative sentence: really.

Expansion:

Sentence, the foreign name of which is sentence. is the basic unit of language use, the category of which is language, and is composed of words and phrases, and combinations of subject, predicate, object, determiner, dative, and complement.

The categories are declarative, interrogative, imperative and exclamatory sentences, which can express a complete meaning. The structural classes of sentences are single and compound sentences.

In order to make the meaning of a sentence clear, a commonly used sentence consists of two parts: one part is the "who" or "what" (the subject part); the other part is the "what" or "how" of the sentence; the other part is the "what" or "how" of the sentence; and the other part is the "what" or "how" of the sentence. what", "how" or "do" (the predicate part). There is a relatively large pause between the sentence and the sentence. It should end with a period, question mark, ellipsis, or exclamation point.