4.4 Case Particles (格助詞): に, で, へ, を, と, から, まで & より

Case Particles (格助詞) and How Mondai 1 Tests Them

Grammar Mondai 1 (文法形式の判断) is the largest single item type on the paper at about 13 questions. Its blanks look varied — a verb ending here, a conjunction there — but a particle is at stake in a large share of them, and the distractor set is almost always built by swapping one particle for another. Particles are therefore where N4 grammar points are won and lost in bulk.

Case particles (格助詞) are the ones that mark a noun's grammatical role in the clause. They attach directly to nouns and never change shape.

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1. The Central Opposition: に (a point) vs で (a span)

If you internalise one thing from this section, make it this. に marks a point; で marks a span. Nearly every に/で question at N4 resolves to that contrast.

The Diagnostic That Settles Most Items

Ask: does the verb put something at a place, or does it happen across a place?

• 「教室にいます」 — I exist at a point. ✓ に
• 「教室で勉強します」 — studying spreads across the room. ✓ で
• 「椅子に座ります」 — sitting lands you on the chair. ✓ に
• 「公園で遊びます」 — playing spreads across the park. ✓ で

The pair 住む and 働く is the classic trap: 住んでいます takes に (住所 is a point of residence — 東京に住んでいます) but 働きます takes で (work is an activity — 銀行で働きます). Learners overgeneralise from 住む and write ✗銀行に働きます.

The Time Particle Rule

に attaches to times you can point at on a calendar or clock, and is omitted from relative time words:

「明日に行きます」 is wrong; 「明日行きます」 is right.

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2. へ vs に for Destinations

Both mark where you are going, and at N4 they are interchangeable in most destination sentences. The nuance the exam occasionally leans on:

• に = the destination as an arrival point (slightly stronger sense of getting there)
• へ = the direction of movement (slightly vaguer, and the only choice before の in a noun-modifying phrase: 「母への手紙」 — ✗「母にの手紙」)

Remember that へ as a particle is pronounced え, never he.

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3. The Three Jobs of を

を is not only "direct object". At N4 it has three uses, and two of them look like locations, which is exactly why they are tested.

1. Direct object — the thing acted on: 「ご飯を食べます。」
2. Path traversed — the space a motion verb moves through, with 歩く, 走る, 散歩する, 通る, 渡る, 飛ぶ: 「公園を散歩します。」「橋を渡ります。」
3. Point of departure — the place or state you exit, with 出る, 降りる, 卒業する: 「電車を降ります。」「大学を卒業しました。」

The trap: 「バスを降ります」 (I get off the bus) versus 「バスに乗ります」 (I get on the bus). Getting on lands you at a point (に); getting off exits a space (を). Learners who translate from English produce ✗バスから降ります, which is not the standard N4 answer.

Remember also the double-を constraint: a single clause may not carry two を. This is why the causative marks its causee with に when the verb is transitive: 「先生は学生に本を読ませました。」

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4. と: Reciprocal Accompaniment

と marks a partner in a mutual action, and it is not a stylistic variant of に.

Verbs that are inherently reciprocal — 結婚する, けんかする, 会う, 相談する, 似ている, 同じ — pull と. と also lists nouns exhaustively (「パンと卵と牛乳」) and marks a quotation (「行くと言いました」).

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5. から / まで: The Endpoints of a Span

Two distinctions worth locking in:

• から vs で for materials. で is used when the material is still visible in the product (机は木で作ります); から is used when a chemical change hides it (ワインはぶどうから作ります).
• までに vs まで. 「五時まで待ちます」 = I will wait continuously up to five. 「五時までに来てください」 = arrive at some point by five (a deadline). Deadlines take までに; continuous duration takes まで.

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6. より: The Standard of Comparison

より marks the thing you are comparing against, and pairs with an affirmative predicate:

• 「今日は昨日より寒いです。」 (Today is colder than yesterday.)
• 「電車のほうがバスより速いです。」 (The train is faster than the bus.)

Its negative counterpart is ほど + negative: 「今日は昨日ほど寒くないです。」 Mixing them — ✗「昨日より寒くないです」 as a way of saying "not as cold as" — is a standard distractor.

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7. Elimination Order for a Particle Blank

1. Find the verb first. The verb decides the particle, not the noun. 乗る demands に; 降りる demands を; 働く demands で.
2. Classify the noun's role: point, span, path, partner, source, endpoint, standard.
3. Check for an existing を in the clause. If one is there, a second cannot be, so a causee or an indirect target must take に.
4. Check whether the time word is absolute or relative. Relative time words (明日, 毎日, 来週) reject に.
5. Substitute and read the whole clause once. If the sentence now says something the context contradicts — 「友達に話します」 in a passage about a two-way conversation — the particle is wrong even though it is grammatical.