か: question particle is a JLPT N5 grammar point. Turns a sentence into a question, no word-order change. Structure: [phrase] か。. This page explains the construction, gives Japanese examples with furigana readings, and links to related grammar points at this level.
か: question particle
Structure
[phrase] か。
Explanation
Adding か at the end of a polite sentence turns it into a question: 本ですか “is it a book?”. Unlike French or English, nothing else changes: no inversion, and the question mark is optional in Japanese. With a question word (なに, どこ…), か is still required: これは なんですか “what is this?”.
Examples
それは 日本の 本ですか。
Is that a Japanese book?
あした がっこうに 来ますか。
Will you come to school tomorrow?
Quiz preview
それは 日本の 本です＿＿。
- か ✓
- も
- を
- と
か at the end of a polite sentence turns it into a question.
あした がっこうに 来ます＿＿。
- か ✓
- を
- へ
- も
Nothing else changes in a Japanese question: just add か.