A sentence that expresses negation (denies or contradicts something), e.g. using "not" in English or "〜ない" in Japanese.
この文は否定文です。
This sentence is a negative sentence.
日本語の否定文は助動詞「ない」を使って作ります。
Negative sentences in Japanese are formed using the auxiliary "nai".
英語では否定文を作るときに do や don't を使うことが多い。
In English, people often use do/don't when making negative sentences.
質問に対して否定文で答えるときは語順や助動詞に注意してください。
When answering a question with a negative sentence, pay attention to word order and auxiliary verbs.