Grammar Rule in 30 Seconds
Use 'come across' when you find something or someone unexpectedly without looking for them.
- Use it for objects: 'I came across an old letter.' (max 20 words)
- Use it for people: 'I came across my boss at the gym.'
- Never put the object between 'come' and 'across'.
Overview
come across の正体です。これは、教科書的な表現ではなく、ネイティブスピーカーのように聞こえる句動詞の1つです。このガイドでは、不自然にならない come across の使い方を見ていきましょう。come across は句動詞です。英語を学び始めたばかりの方向けに説明すると、句動詞とは、動詞（come など）と前置詞や副詞（across など）が組み合わさったものです。これらが合わさることで、物理的に「来る」や道路を「渡る」とは全く関係のない、新しい意味が生まれます。come across には主に2つの使い方があります。1つ目は、全くの偶然に何かを見つけたり、誰かに会ったりすることです。探していたわけではないのに、そこにあったという状況です。日本語の「おっと、こんなの見つけた！」にあたります。2つ目の使い方は、第一印象についてです。他の人にどう見えるかを説明します。例えば、Zoomでの就職面接で、下はパジャマを履いているとき（心配しないでください、みんなやっています）、デスクの下で猫が足を攻撃していても、プロフェッショナルに come across （見られたい/印象を与えたい）はずです。find という言葉を使うのは少し退屈だからです。come across は表現に彩りを与えます。発見が驚きであったことを聞き手に伝えます。「鍵を見つけた」（探していた）と「古いゲームボーイを come across （偶然見つけた）」（存在を忘れていた）の違いです。How This Grammar Works
come と across を隣り合わせにしておく必要があります：come across + [見つけたもの]。come の部分だけです。across はそのままです。飼い主のそばを離れない忠実な犬のようなものです。- 現在：この街ではよく素敵なカフェを
come across（偶然見つけます）。 - 過去：昨日、変なツイートを
came across（偶然見かけました）。 - 未来：このゲームでは多くの困難を
come across（経験する/直面する）でしょう。
come across （渡った/偶然見つけた）のでしょうか？反対側で、探してもいなかった文法書を見つけたからです！（はい、教えることに専念します。約束します。）
Formation Pattern
come across の使い方はとてもシンプルなレシピに従います。次のステップで文章を作ってみましょう：
come を加える（正しい時制と人称に活用させる）。
across という言葉を加える。
Conjugation Table
| Form | Example | Translation |
|---|---|---|
| --- | --- | --- |
| I/You/We/They (Present) | I come across |
偶然見つける / 印象を与える |
| He/She/It (Present) | She comes across |
彼女は～に見える |
| Past Tense | We came across |
偶然見つけた |
| Continuous | He is coming across |
彼は～に見えている（現在） |
Politeness Levels
came across （偶然見つけた）よ！」（友達に最適）。came across （遭遇しました）。」（論文や仕事に最適）。come across （遭遇する）かもしれません。」
When To Use It
- 1偶然物を見つける：部屋を掃除していて、昔の学生証を見つける。「この古い写真を
came across（偶然見つけた）んだ！」 - 2予期せず人に会う：音楽フェスで昔の近所の人に会う。「コンサートで近所の人に
came across（偶然会った）よ。」 - 3オンラインで情報を見つける：Redditを見ていて素晴らしいレシピを見つける。「サワードウの作り方のチュートリアルを
came across（偶然見つけた）んだ。」 - 4性格を描写する（印象）：「自分はどう見える？」という使い方です。「彼は動画ではとても自信があるように
comes across（見えます）。」 - 5ビジネスシーン：書類を確認しているとき。「レポートに小さな間違いを
came across（見つけました）。」
Common Mistakes
- 分離のミス： ✗ 「I
camean old friendacross.」 ✓ 「Icame acrossan old friend.」 常にセットで！ Findとの混同：積極的に探していたものにはcome acrossを使わないでください。Asの忘れ：印象について話すときは、通常asを使います。 ✗ 「Hecomes acrossnice.」 ✓ 「Hecomes acrossas nice.」
Contrast With Similar Patterns
- Find：一般的な言葉。意図的でも偶然でも使えます。
come acrossは偶然*だけ*です。 - Run into：人について話すときの
come acrossに非常に似ています。 - Stumble upon：
come acrossよりも詩的/劇的な表現です。
Quick FAQ
catch a whiff of を使います。come across （偶然の遭遇）です！2. Negative Contractions
| Full Form | Contraction | Usage |
|---|---|---|
|
do not come across
|
don't come across
|
General truth/habit
|
|
does not come across
|
doesn't come across
|
Third person singular
|
|
did not come across
|
didn't come across
|
Past events
|
Conjugating 'Come Across'
| Tense | Subject | Form | Example |
|---|---|---|---|
|
Present Simple
|
I/You/We/They
|
come across
|
I often come across old friends.
|
|
Present Simple
|
He/She/It
|
comes across
|
She comes across as very kind.
|
|
Past Simple
|
All subjects
|
came across
|
We came across a hidden path.
|
|
Present Perfect
|
I/You/We/They
|
have come across
|
I have come across this issue before.
|
|
Past Participle
|
All subjects
|
come across
|
The message had come across clearly.
|
|
Continuous
|
All subjects
|
coming across
|
He is coming across as a bit arrogant.
|
Meanings
To find something or meet someone by chance, rather than by looking for them intentionally.
Finding Objects
To discover an item unexpectedly while doing something else.
“I came across a twenty-dollar bill in my winter coat.”
“Scientists came across a new species of frog in the rainforest.”
Meeting People
To encounter a person by chance in a public place.
“I came across an old school friend in London last week.”
“It's a small town; you're bound to come across someone you know.”
Impression/Personality
To behave in a way that makes people believe you have a particular characteristic.
“He comes across as a very shy person, but he's actually quite talkative.”
“I hope I didn't come across as rude during the interview.”
Clarity of Ideas
When an idea or emotion is expressed clearly and understood by others.
“Your point didn't really come across in the essay.”
“The humor in the movie doesn't always come across well in translation.”
Reference Table
| 状況 | 意図 | 例文 | 備考 |
|---|---|---|---|
|
Finding an object
|
Accidental
|
`I came across an old photo.`
|
積極的に探していなかった。
|
|
Meeting a person
|
Accidental
|
`She came across a former colleague.`
|
予期せぬ出会い。
|
|
Discovering information
|
Accidental
|
`He came across an interesting fact.`
|
何か別のことをしている最中に。
|
|
Encountering a problem
|
Accidental
|
`We came across a bug in the code.`
|
予期せぬ問題。
|
|
Perceiving an impression
|
Accidental
|
`His speech came across well.`
|
どのように認識されたか。
|
|
Actively searching
|
Intentional
|
`I found my keys.`
|
`find`を使い、`come across`は使わない。
|
フォーマル度スペクトル
I encountered a relevant document during my research. (Academic/Casual)
I came across an interesting paper while reading. (Academic/Casual)
I found this cool article online. (Academic/Casual)
I just stumbled on this sick post. (Academic/Casual)
「Come Across」の様々な使い方
物
- 古い写真 Came across an old photo.
- 希少本 Come across a rare book.
人
- 旧友 Came across an old friend.
- 同僚 Come across a former colleague.
情報・アイデア
- 面白い記事 Come across an interesting article.
- 新しいアイデア Came across a great idea.
問題・課題
- 技術的欠陥 Came across a technical glitch.
- 困難 Come across a difficulty.
「Come Across」と似た動詞の比較
「Come Across」を使うべき？フローチャート
その出会いや発見は偶然でしたか？
物、情報、または人との出会いについて話していますか？
何に「Come Across」できますか？
物理的なもの
- • Old letters
- • Rare collectibles
- • Lost keys
- • A cool rock
人
- • An old classmate
- • A distant relative
- • A former neighbor
- • A celebrity
デジタルコンテンツ
- • A viral video
- • An interesting article
- • A new podcast
- • An inspiring quote
抽象的な概念
- • A brilliant idea
- • A new perspective
- • A difficult problem
- • An unexpected truth
レベル別の例文
I came across a dog in the park.
I found a dog by accident in the park.
Did you come across my pen?
Did you find my pen by accident?
I came across a nice shop.
I found a nice shop by chance.
She came across an old book.
She found an old book by accident.
I came across some old coins in the garden.
I found some old coins while gardening.
We came across a small cafe near the beach.
We found a cafe by chance while walking.
He came across his teacher at the cinema.
He met his teacher by accident.
I didn't come across any problems with the car.
I didn't find any problems.
I came across an interesting article while browsing the web.
I found an article by chance online.
She comes across as a very confident leader.
She gives the impression of being confident.
If you come across any errors, please let me know.
If you find any mistakes by chance...
We came across a lot of opposition to the new plan.
We encountered resistance unexpectedly.
The candidate came across very well during the televised debate.
The candidate made a good impression.
I came across this rare manuscript in a dusty corner of the library.
I discovered a rare book by chance.
It's difficult to come across such high-quality materials these days.
It is hard to find these materials by chance/luck.
His sarcasm didn't really come across in the text message.
His sarcasm wasn't clearly communicated.
In his latest book, he comes across as somewhat disillusioned with modern society.
He appears to be disillusioned based on his writing.
The researchers came across a significant anomaly in the control group data.
They found an unexpected data point.
I've never come across such a blatant disregard for the rules.
I have never encountered such behavior before.
The emotional depth of the performance really came across to the audience.
The audience felt and understood the emotion.
The nuances of the dialect often fail to come across in standard translations.
The subtle meanings are lost in translation.
One occasionally comes across a piece of architecture that defies all categorization.
One sometimes finds a unique building by chance.
He comes across as an intellectual heavyweight, despite his lack of formal schooling.
He gives the impression of being very smart.
The sheer scale of the tragedy only truly came across when the aerial footage was released.
The magnitude was only understood then.
間違えやすい
Both mean meeting by chance. Learners use them interchangeably for objects.
Learners use 'come across' for things they were actively searching for.
The words look similar.
よくある間違い
I came an old book across.
I came across an old book.
I comed across a cat.
I came across a cat.
I come across with my friend.
I came across my friend.
I came across to a shop.
I came across a shop.
I am looking for my keys and I came across them.
I was looking for my keys and I found them.
He comes across like a nice guy.
He comes across as a nice guy.
I came across it yesterday.
I came across it yesterday.
The message didn't come acrossed.
The message didn't come across.
I came across to him in the street.
I came across him in the street.
He comes across as being rude.
He comes across as rude.
The idea came across itself well.
The idea came across well.
文型パターン
I came across ___ while I was ___.
He/She comes across as ___.
Have you ever come across ___?
The ___ didn't really come across in the ___.
Real World Usage
I came across your TikTok and had to follow!
I want to come across as someone who is eager to learn.
The researchers came across a flaw in the previous study.
We came across a beautiful waterfall while hiking.
Look at this meme I came across lol.
I came across this dress and thought of you.
偶然の発見を覚えておこう
動詞を切り離さないで
印象を伝える使い方
日常会話で自然に聞こえる
Smart Tips
Use 'come across as' followed by an adjective. It's the most natural way to describe first impressions.
Always use 'came across' to emphasize that you weren't looking for that specific item.
Glue 'come' and 'across' together. Never let a pronoun break them up.
Use 'come across' in the negative to explain why someone didn't understand you.
発音
Linking
The 'm' in 'come' links to the 'a' in 'across'. It sounds like 'co-macross'.
Stress
The primary stress is on the second syllable of 'across'.
Falling Intonation
I came across a ↘️ photo.
A standard declarative statement.
暗記しよう
記憶術
ACROSS = A Chance Random Occurrence Someplace Somewhere.
視覚的連想
Imagine you are walking across a bridge and you see a shiny diamond on the floor. You weren't looking for a diamond, you were just walking 'across' the bridge.
Rhyme
When you're walking and you're lost, see what you have come across!
Story
I was cleaning my room when I came across a map. The map led me to a park where I came across an old friend. We talked, and he came across as a very happy person.
Word Web
チャレンジ
Look through a random book or website for 2 minutes. Write down one interesting fact or word you 'came across'.
文化メモ
In the UK, 'come across' is very common in school reports to describe a student's attitude (e.g., 'He comes across as a diligent student').
Americans often use 'run into' for people more frequently than 'come across', reserving 'come across' for objects or abstract ideas.
Aussies might use 'stumble across' as a more casual alternative in outdoor contexts.
The phrase combines the verb 'come' (Old English cuman) with 'across' (from 'a-' + 'cross').
会話のきっかけ
Have you ever come across something valuable on the street?
How do you think you come across to people when you first meet them?
What's the strangest thing you've ever come across in an old book?
If you came across a suitcase full of money, would you keep it?
日記のテーマ
よくある間違い
Test Yourself
Yesterday, I ___ a really old map in the attic.
Find and fix the mistake:
I often come my favorite songs across when browsing playlists.
Choose the correct sentence:
Score: /3
練習問題
8 exercisesYesterday, I ___ an old diary in my desk.
Choose the correct word order.
Find and fix the mistake:
She comes across with a very intelligent person.
across / did / you / any / come / problems / ?
Translate using 'come across'.
1. Finding an object, 2. Giving an impression, 3. Meeting a person
I ___ my keys after looking for twenty minutes.
The teacher's explanation didn't really ___ to the students.
Score: /8
Practice Bank
12 exercisesYou might ___ some unexpected deals if you browse the clearance section.
During her travels, she often ___ new cultures and traditions.
He actively searched for his lost dog and came across it in the park.
Her presentation came across confusing because of the lack of examples.
Which sentence is correct?
Which sentence is correct?
Translate into English: 'Me encontré con un antiguo manuscrito en la biblioteca.'
Translate into English: 'Su propuesta sonó muy convincente.'
Arrange these words into a sentence:
Arrange these words into a sentence:
Match the subjects with the correct verb form:
Match the beginnings with the endings:
Score: /12
よくある質問 (8)
Yes, but only if you find it by accident while doing something else. If you are actively searching for it, use `found`.
It is neutral. You can use it in a casual text message or a formal business report. It is very versatile.
`Stumble upon` is more informal and emphasizes the 'clumsy' or highly accidental nature of the find. They are very similar.
No. This is a common mistake. You should say `I came across a friend`. No 'with' is needed.
No, we don't usually use it in the passive. We don't say 'The photo was come across by me.'
Yes! You can `come across an idea` in a book or `come across a problem` in a project.
It comes from the idea of your path 'crossing' the path of the object or person by chance.
Yes, mainly for the 'impression' sense: 'He is coming across as very helpful today.'
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Encontrarse con / Toparse con
English does not use a preposition like 'with' after 'across'.
Tomber sur
The literal imagery is 'falling' in French vs 'crossing' in English.
Zufällig stoßen auf
English 'come across' is never separable, unlike many German phrasal verbs.
ふと見つける (Futo mitsukeru)
Japanese relies on adverbs to show the 'accidental' nature, while English uses a specific phrasal verb.
صادف (Sadafa)
Arabic uses a single root verb, whereas English uses a verb-preposition combination.
偶然发现 (Ǒurán fāxiàn)
English 'come across' is a single semantic unit (phrasal verb), not an adverb + verb.
Learning Path
Prerequisites
Related Grammar Rules
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