Japanese Particles: を・に・から・で

を vs に — The Core Contrast

The particle learners confuse most. Both appear in the same command: "#buttonに .activeを追加して" has one of each. Drills mix them so the choice depends on the role, not on memorised word order. `set` is the proof: "10を :countに設定して" keeps the same split even though the English word order ("set to :count 10") reverses.

This is the confusion that matters. Both particles appear in nearly every two-argument command — the same sentence carries one of each.

#buttonに .activeを追加して

= add .active to #button

#buttonに

.activeを

追加して

DEST

PAT

VERB

to #button

.active

add (imperative)

#buttonに .activeを追加して

= add .active to #button

#buttonに

.activeを

追加して

DEST

PAT

VERB

to #button

.active

add (imperative)

One sentence, both particles: を marks what moves (.active), に marks where it ends up (#button). The choice depends on the role each noun plays, never on where it sits.

10を :countに設定して

= set to :count 10

The proof case. The English word order reverses — :count comes before 10 in English, after it in Japanese — but the particle logic does not change: 10 is the thing being placed and takes を; :count is where it lands and takes に.

Drills mix を and に so the choice depends on the role. Aim for 75%.

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