Temporal Precedence: 〜まえに (Saying what happens before something else)
Expresses that an action takes place prior to another event: “before doing A, B happens”. Always pairs with the non-past dictionary form for verbs.
Action Sequence: [Dictionary Form / Noun の] 前に (Before)
neru mae ni ha o migakimasu
Before going to sleep, I brush my teeth.
Precedence with 前に (Dictionary Form) vs Succession with 後で (Ta-Form)
Micro-Shift寝る前に本を読みます。
I read a book before going to sleep.
Action happens prior to sleeping (dictionary form required).
Example Sentences
Let's wash hands before the meal
How it works
Noun + の前に (ご飯の前に) sets the temporal frame before the call to wash hands.
Mental Model: Looking Ahead on the Timeline
When describing actions that must take place before another event occurs, Japanese uses 〜まえに (written with the kanji 前 meaning “in front of” or “before”).
Unlike 〜あとで (which requires the past た-form because the first action must be finished), 〜まえに requires the non-past dictionary form (辞書形). At the moment the main action takes place, the action following 前に has not occurred yet—it still lies ahead on the horizon.
Three Structural Patterns
- Pattern 1 — With a Verb (Always Dictionary Form!): [Verb in dictionary form] + 前に
- 寝る (sleep) → 寝る前に (”before going to bed”)
- 食べる (eat) → 食べる前に (”before eating”)
- 日本へ行く (go to Japan) → 日本へ行く前に (”before going to Japan”)
- 出かける (go out) → 出かける前に (”before going out”)
- Pattern 2 — With a Noun (Must use の!): [Noun] + の + 前に
- 食事 (meal) → 食事の前に (”before the meal”)
- 旅行 (trip) → 旅行の前に (”before the trip”)
- 会議 (meeting) → 会議の前に (”before the meeting”)
- Pattern 3 — With a Duration or Time Span (No の!): [Span of time] + 前に
- ３年前 (san-nen mae) → ”three years ago”
- １時間前 (ichi-jikan mae) → ”one hour ago”
- ２週間前 (ni-shūkan mae) → ”two weeks ago” When measuring a quantity of elapsed time looking back from the present, do NOT use の!
The Symmetrical Contrast: 前に vs 後で
Remember this crystal-clear symmetry: - 食べた後で (Eaten + after = After eating) → Past た-form. - 食べる前に (To eat [unrealized] + before = Before eating) → Dictionary form.
Compare these two everyday habits: • 寝る前に、歯を磨きます。 (”Before going to bed, I brush my teeth.”) • 起きた後で、水を飲みます。 (”After waking up, I drink water.”)
The Tense Trap: Past Sentences with 前に
Beginners often make the mistake of matching the tense across both halves of the sentence:
*寝た前に、本を読みました。 (INCORRECT!)
Even though you read the book yesterday in the past, at the time of reading, the act of “going to bed” was still in the future! The correct sentence is strictly: 寝る前に、本を読みました。 (”Before going to bed, I read a book.”) The tense of the entire sentence is anchored solely by the final verb (読みました).
Spatial “In Front Of” vs Temporal “Before”
Because 前 means “front”, context determines whether it describes physical space or time: - Physical space: 駅の前に交番があります。 (”There is a police box in front of the station.”) - Time point: 授業の前に先生と話しました。 (”Before class, I spoke with the teacher.”)
In Dialogue
- ASpeaker A
寝る前に何をしますか。
What do you do before going to sleep?
- BSpeaker B
寝る前に、必ず日記を書きます。
Before sleeping, I always write in my diary.
Plain dictionary form always precedes 前に
Quick Check
Choose the correct sentence for: “Please wash your hands before eating a meal.”