前 and 後 for Before and After in Japanese

In Brief

Use a verb’s dictionary form + 前に for “before doing”: 食べる前に (“before eating”). Use the た-form + 後で or 後に for “after doing”: 食べた後で (“after eating”). With a noun (a word for a person, place, thing, or event), connect it with の: 仕事の前に (“before work”), 仕事の後で (“after work”).

Overview

Japanese 前（まえ） means “before” in time as well as “front” in space. 後 is commonly read あと in the patterns taught here and means “after” or “later.” These words let you place one action or event on either side of another: wash your hands before eating, take a walk after eating, or meet someone after work.

This is an A2 pattern, but it rests on an important Japanese habit: the form before 前 or 後 is chosen from the viewpoint of the event inside that phrase. English uses “before eating” and “after eating,” with the same -ing form in both. Japanese marks the difference directly: 食べる前に but 食べた後で. The action before 前 has not happened yet at that reference point, while the action before 後 is treated as completed.

The beginner rule is dependable: dictionary form + 前に, and た-form + 後で／後に. Learn those two units first. Later sections explain noun patterns, particle choices, and more advanced contrasts without changing that core rule.

How It Works

Before an action: dictionary form + 前に

The dictionary form is the basic plain form under which a verb appears in a dictionary, such as 食べる “eat,” 行く “go,” or 勉強する “study.” Put it directly before 前に:

Pattern	Meaning
verb (dictionary form) + 前に + main action	do the main action before the first action
食べる前に手を洗います。	I wash my hands before eating.
寝る前に本を読みます。	I read a book before going to sleep.

The order on the page matches the time relationship, not necessarily the order in which the verbs are completed:

食べる前に手を洗います。

1. 手を洗います — wash hands
2. 食べます — eat

The verb 食べる is non-past even if the whole sentence describes the past:

昨日、寝る前に本を読みました。
“Yesterday, I read a book before going to sleep.”

Do not change 寝る to 寝た merely because 読みました is past. At the time of reading, going to sleep was still ahead.

After an action: た-form + 後で／後に

The た-form is the plain completed or past form of a verb: 食べる → 食べた, 行く → 行った, する → した. Put it before 後で or 後に:

Pattern	Meaning
verb (た-form) + 後で + main action	do the main action after the first action
食べた後で散歩します。	I take a walk after eating.
宿題をした後にゲームをしました。	I played a game after doing my homework.

Here the first action must already be complete before the second one occurs:

食べた後で散歩します。

1. 食べました — ate
2. 散歩します — take a walk

The た-form does not by itself make the whole sentence past. It marks the first action as completed relative to what follows:

明日、朝ご飯を食べた後で出かけます。
“Tomorrow, I will go out after eating breakfast.”

Although 食べた looks like a past form, 明日 and 出かけます place the full sequence in the future.

With nouns: noun + の + 前／後

A noun cannot normally attach directly to 前 or 後 in these patterns. Use の as the connector:

Pattern	Example	Meaning
noun + の前に	会議の前に	before the meeting
noun + の後で	仕事の後で	after work
noun + の後に	授業の後に	after class

Compare the verb and noun versions:

Verb-based phrase	Noun-based phrase
仕事を始める前に — before starting work	仕事の前に — before work
授業が終わった後で — after class ended	授業の後で — after class

The noun version is shorter. The verb version can express who did what and is therefore more precise.

What do に and で do here?

In 前に, に marks the point before which the main action happens. For the basic “before doing” pattern, learn 前に as a fixed unit.

Both 後で and 後に can mean “after.” In everyday sequences where someone does one action and then another, 後で is extremely common. The particle で presents the preceding event as the setting after which the next action takes place. 後に points more directly to a position in a sequence and often sounds suitable for scheduled, written, or more formally ordered events. In many ordinary sentences, either is possible and the difference is small.

Form	Typical feel	Example
後で	everyday “after doing”; also “later”	食べた後で話しましょう。
後に	a point following an event; somewhat more formal in some contexts	式の後に写真を撮ります。

Be careful with 後で on its own. It commonly means “later”: 後で電話します means “I’ll call later.” No earlier action needs to be stated.

Examples in Context

Japanese	English	Note
食べる前に手を洗います。	I wash my hands before eating.	Dictionary form + 前に
寝る前に本を読みます。	I read a book before going to sleep.	The reading happens first.
出かける前に窓を閉めてください。	Please close the windows before going out.	A request as the main action
日本へ行く前に、日本語を勉強しました。	I studied Japanese before going to Japan.	The full sequence is in the past.
会議の前に資料を確認しましょう。	Let’s check the materials before the meeting.	Noun + の前に
食べた後で散歩します。	I take a walk after eating.	た-form + 後で
歯を磨いた後で寝ます。	I go to bed after brushing my teeth.	Two routine actions
明日、仕事が終わった後で買い物に行きます。	Tomorrow, I’ll go shopping after work finishes.	A future sequence using た-form
仕事の後で飲みに行きましょう。	Let’s go for a drink after work.	Noun + の後で
授業の後に先生に質問しました。	I asked the teacher a question after class.	Noun + の後に
映画を見た後で、感想を話し合いました。	After watching the film, we discussed our impressions.	A completed first action
薬を飲む前に、この説明を読んでください。	Please read these instructions before taking the medicine.	前に in an instruction
駅に着いた後で、メッセージを送ります。	I’ll send a message after I arrive at the station.	Future meaning despite 着いた
後でまた連絡します。	I’ll contact you again later.	後で used independently

Common Mistakes

Using the た-form before 前に

• Wrong: 食べた前に手を洗いました。
• Right: 食べる前に手を洗いました。
• Meaning: “I washed my hands before eating.”
• Why: The eating had not happened yet at the point when the hands were washed, so Japanese uses the dictionary form 食べる before 前に. The past tense of the complete sentence appears on 洗いました.

Using the dictionary form before 後で

• Wrong: 食べる後で散歩します。
• Right: 食べた後で散歩します。
• Meaning: “I take a walk after eating.”
• Why: The eating is complete before the walk starts, so 食べる must become its た-form, 食べた.

Forgetting の after a noun

• Wrong: 仕事後で友達に会います。
• Right: 仕事の後で友達に会います。
• Meaning: “I meet a friend after work.”
• Why: In this general pattern, の links the noun 仕事 to 後. Some fixed compounds omit の, but they should be learned separately rather than treated as the basic rule.

Treating the た-form as the tense of the whole sentence

• Misleading interpretation: 食べた後で出かけます must refer to the past because it contains 食べた.
• Correct interpretation: 食べた後で出かけます。 can mean “I’ll go out after eating.”
• Why: 食べた marks eating as complete relative to going out. The final verb 出かけます and the context establish the time of the whole sentence.

Translating English “before” without checking its meaning

• Wrong for time: 駅の前に電話します when you mean “I’ll call before arriving at the station.”
• Right: 駅に着く前に電話します。
• Why: 駅の前 can mean “in front of the station,” because 前 also describes physical position. Use a verb phrase when the intended relationship is between actions.

Usage Notes

前 can mean “in front of,” and 後 can relate to what is behind

Context and particles distinguish time from space. 店の前 is usually “in front of the shop,” while 開店の前 is “before opening.” Japanese spelling does not force a separate word for every English meaning, so read the entire phrase rather than translating 前 in isolation.

For physical “behind,” 後ろ（うしろ） is generally clearer than 後: 家の後ろ means “behind the house.” The temporal pattern in this article uses 後（あと）.

前に can also mean “ago” after a duration

A duration + 前に looks similar but answers “how long ago?” rather than “before what action?”

• 三年前に日本へ行きました。 — “I went to Japan three years ago.”
• 十分前に着きました。 — “I arrived ten minutes ago.”

Compare 三時前に (“before three o’clock”) with 三時間前に (“three hours ago”). The kind of time expression changes the interpretation.

後で may be deliberately vague

後でやります means “I’ll do it later.” It is natural, but it gives no exact deadline. In a workplace or when making plans, add a time if precision matters: 三時ごろやります (“I’ll do it around three”) or name the event: 会議が終わった後でやります (“I’ll do it after the meeting ends”).

Commas help readability, not grammar

A comma often follows a longer 前に or 後で phrase, especially in writing:

駅に着いた後で、友達に電話しました。

The comma is optional in many short sentences. It does not change the verb-form rule.

Beyond the Basics / Advanced Use

You do not need to master all of the following at A2, but these distinctions appear often in natural Japanese.

後で versus てから

てから also means “after doing,” using the verb’s て-form + から:

• 朝ご飯を食べた後で、薬を飲みます。
• 朝ご飯を食べてから、薬を飲みます。

Both can mean “I take the medicine after breakfast.” てから often highlights a direct sequence: first finish A, then begin B. た後で presents B more generally as occurring after A, so an interval can fit more easily. This is a tendency, not an absolute ban on delay with てから.

後に and the reading のち

後 can also be read のち, especially in formal writing, announcements, narratives, and fixed expressions. その後 may be read そのあと or そのご depending on meaning and register; 後ほど（のちほど） is a polite way to say “later.” Beginners should produce あと in ordinary 後で／後に phrases and learn other readings as vocabulary encountered in context.

Stating a subject inside the time phrase

A clause (a group of words built around a verb) before 前 or 後 can have its own subject, commonly marked by が:

私が出かける前に、田中さんが来ました。
“Mr. Tanaka came before I went out.”

子どもが寝た後で、両親は映画を見ました。
“After the children went to sleep, the parents watched a film.”

This matters because Japanese often leaves the subject unstated when context makes it obvious. If the two actions have different doers, naming them prevents ambiguity.

Negative actions

To say “before not doing” or “after not doing,” Japanese can place a negative plain form before 前 or a negative completed form before 後, but such phrases can be awkward and context-sensitive. Often a positive rephrasing is clearer. For example, instead of building a complicated phrase for “before leaving without eating,” say 何も食べないで出かけました (“I went out without eating anything”). Keep the positive core patterns automatic before extending them into negative clauses.

前に versus までに

These are not interchangeable. 前に places an action earlier than another action or event; までに gives a deadline, “by.”

• 会議の前に資料を読みます。 — “I’ll read the materials before the meeting.”
• 金曜日までに資料を読みます。 — “I’ll read the materials by Friday.”

The second sentence promises completion no later than Friday; it does not identify the next event in a sequence.

Practice Tips

1. Build paired sentences. Choose five daily actions and make both sides of the contrast: 寝る前に歯を磨きます and 歯を磨いた後で寝ます. Saying the same sequence from both directions reinforces the form change.
2. Draw a two-step timeline. For each example, write A and B in actual chronological order. Circle the verb before 前 or 後, then check: dictionary form before 前, た-form before 後.
3. Listen for complete chunks. In conversation, collect phrases such as 出かける前に, 終わった後で, and 後で連絡します. Learning these as units makes particle choice more natural than translating one English word at a time.

Related Concepts

• Prerequisite: た-Form (Past Plain) — supplies forms such as 食べた, 行った, and した for the pattern た-form + 後で／後に.