an interrogative sentence — a sentence that expresses a question, marked by question words, intonation, or punctuation.
「これは何ですか？」は典型的な疑問文だ。
'What is this?' is a typical interrogative sentence.
疑問文と平叙文では語順や助詞の使い方が変わることがある。
The word order and particle usage can differ between interrogative and declarative sentences.
授業で英語の疑問文の作り方を練習した。
We practiced forming interrogative sentences in English during class.