一体
🃏 Flashcard
一体
ittai
Tap to reveal usage
emphasis; what on earth?
N3
Tap to test your recall · +10 XP
📊 Pattern Stats
JLPT Level
N3
Intermediate · Expressing nuance & contrast
Reading
ittai
Post ID
50845
Patterns today
0
0 / 10 daily goal
📝 Usage Notes
emphasis; what on earth?
📖 How to use it
Adds emphatic bewilderment to a question, like saying 'what on earth' or 'who in the world'.
Attaches to
Placed directly before the question word (e.g., 誰, 何, どこ, どうして) in a question. No specific verb form is required; it modifies the interrogative.
一体 is an adverb that injects a sense of puzzlement, frustration, or urgency into a question. It often appears in rhetorical questions where the speaker truly cannot understand or doubts the answer. You'll see it in both casual and formal speech, but it's more common in conversation than in writing.
When you use 一体, the question feels stronger: it implies 'I've been thinking about this, but I really can't figure it out.' For example, '一体何してるの？' sounds more exasperated than just '何してるの？' Be careful not to overuse it in polite requests—it can sound confrontational if not softened with の/んですか.
一体誰がそんなことを言ったんですか。
Ittai dare ga sonna koto o itta n desu ka.
Who on earth said something like that?
一体どうして彼は来なかったんだろう。
Ittai doushite kare wa konakatta n darou.
Why in the world didn't he come?
あの音は一体何だろう。
Ano oto wa ittai nan darou.
What on earth is that noise?
Not いったい vs. ぜんたい (全体)
Looks similar to 全体 as a noun meaning 'whole', but as an adverb it's written 一体 and always precedes a question word. 全体 is used in phrases like 全体像 (overall picture) and never adds bewilderment to a question.
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Used in both spoken and written Japanese, but it's more at home in casual or semi-formal conversation; in very formal writing you might avoid it for a neutral tone.
🎯 Quick Quiz
What does this grammar pattern mean or do?
一体
📚 How to Master This Pattern
Say It Aloud
Press Hear it and repeat 一体 three times. Feel the rhythm — grammar patterns have a natural flow.
Flip Before Reading
Always try to recall the usage before flipping the card. Struggle = learning. Every failed recall makes the next one stick harder.
Write Two Sentences
Compose two original sentences using 一体. One about yourself, one about something you see right now.
Spaced Review
Save this pattern and revisit at 10 min, 1 day, 3 days. Production (writing) beats recognition for grammar.
🔗 More JLPT N3 Patterns
❓ Frequently Asked Questions
What does the grammar pattern 一体 mean?
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Emphasis; what on earth?
What JLPT level is 一体?
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Nihoner currently groups this pattern under JLPT N3 — Intermediate · Expressing nuance & contrast. Use the level label as study guidance rather than a prediction of what will appear on an exam.
How do you use 一体 in a sentence?
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Attach 一体 (ittai) to the appropriate verb or noun form as described in the usage notes. Then try writing two original sentences — one about yourself and one about something around you.
Is 一体 formal or casual Japanese?
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一体 is used in both casual and polite contexts. It appears frequently in everyday conversation, textbooks, and simple written materials.
How can I remember 一体 long-term?
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Use the flashcard on this page for active recall — see the pattern, reconstruct the usage from memory, then flip. Follow with the 4-choice quiz to distinguish it from similar patterns. Review later the same day and again over the following days. Writing original sentences can help you practise using the pattern in context.