Grammar Rule in 30 Seconds
Use 'Today', 'Tomorrow', and 'Yesterday' to anchor your sentences to the present, future, or past without needing specific dates.
- Use 'Today' for the current 24-hour period: 'Today is sunny.'
- Use 'Tomorrow' for the day after now: 'Tomorrow is Tuesday.'
- Use 'Yesterday' for the day before now: 'Yesterday was cold.'
Overview
yesterdayに素晴らしい映画を見た」と言ったけど、本当は「tomorrowに行く」つもりだった、とか。よくあることです！この3つの小さな言葉、today、tomorrow、yesterdayは、英語で時間を理解するための絶対的な親友です。計画を話したり、物語を共有したり、単に生活を整理したりするための基礎となります。これらを正しく使えれば、もうずっと自然に聞こえるようになります。簡単そうに見えますが、マスターするのは大きな一歩です。間違ってZoomの面接を違う日に予約することが二度とないようにしましょう。today、tomorrow、yesterdayという言葉は時の副詞です。これは、何かが*いつ*起こるかを伝えるためのかっこいい言い方です。カレンダーの簡単な時間マーカーだと考えてください。Yesterdayは今の前の日です。Todayはあなたがいる現在の24時間のブロックです。そしてtomorrowは次に来る日です。これらは英語で最も一般的な言葉の一部で、友達とのメッセージ（coffee tomorrow?）から公式な書類の記入まで、あらゆる場面で使われます。これらは過去、現在、未来を分けるためのあなたの最初で最も重要なツールです。多くの文法とは異なり、これらの言葉のためだけに覚えるべき複雑な語尾や動詞の変化はありません。本当のコツは、完璧な靴を服装に合わせるように、正しい動詞の時制と組み合わせることです。How This Grammar Works
todayは月曜日、yesterdayは日曜日、tomorrowは火曜日です。これを金曜日に読んでいるなら、todayは金曜日、yesterdayは木曜日、tomorrowは土曜日です。それらは「今」へのアンカーです。Yesterdayは過去を指します。なので、過去形の動詞と一緒に使わなければなりません。例：I *walked* to the store yesterday.Todayは現在の日を指します。現在形（I *am* busy today）、日の早い時間のことには過去形（I *ate* breakfast today）、日の遅い時間のことには未来形（I *will call* you today）を使うことができます。ちょっと柔軟なスーパースターです。Tomorrowは未来を指します。なので、未来形の動詞と一緒に使わなければなりません。例：We *will watch* a movie tomorrow.またはWe *are going to watch* a movie tomorrow.
Formation Pattern
today、tomorrow、yesterdayという言葉を全く変える必要はありません。複数形も、特別な語尾もありません。それらは美しくシンプルです。唯一の「パターン」は、文のどこに置くかです。
Yesterday, I played video games.
Today, I have a lot of homework.
Tomorrow, she is visiting her family.
I played video games yesterday.
I have a lot of homework today.
She is visiting her family tomorrow.
I played yesterday video gamesは非常に奇妙に聞こえます。最初か最後に置いてください。靴下を履くようなものです。靴の前に履くこともできますし、持っていることもできますが、靴の*後*に履くことはできません。うまくいかないのです。
When To Use It
- 計画を立てる： 社会生活を整理するとき、これらは不可欠です。
Are you free tomorrow?やLet's get lunch today.WhatsAppやiMessageなど、友達とチャットするアプリで常に使います。 - 物語を語る：出来事を語るとき、
yesterdayはあなたのヒーローです。You won't believe what happened yesterday. I saw a celebrity at the coffee shop! - 最新情報を伝える：職場や学校の文脈では、明確さを提供します。
I finished the report yesterday.やThe presentation is tomorrow morning. - リマインダーを設定する：自分自身や他の人のために。
Remember, we have that appointment tomorrow. - ソーシャルメディアで：
Yesterday's sunset was amazing! #nofilterやBig project launching tomorrow! Stay tuned.
Common Mistakes
- 1間違った動詞の時制： 最も頻繁な失敗。
- ✗
I will go to the party yesterday.(過去の言葉と未来の動詞) - ✓
I went to the party yesterday. - ✗
She watch a movie tomorrow.(未来の言葉と現在の動詞) - ✓
She will watch a movie tomorrow.
- 1
Today MorningやYesterday Nightの混同： これは他の多くの言語からの直訳ですが、英語では不自然に聞こえます。
- ✗
I was tired today morning. - ✓
I was tired this morning. - ✗
Did you go out yesterday night? - ✓
Did you go out last night? - ✗
We have a party today night. - ✓
We have a party tonight.
todayには、その部分を表す独自の特別な言葉がすでにあります：this morning, this afternoon, tonight。そしてyesterdayには、その夜を表す特別な言葉があります：last night。- 1
in,on,atのような前置詞の使用： これらの時の言葉は特別です。前置詞は必要ありません。VIPパスのようなもので、追加の言葉は不要です。
- ✗
I will see you on tomorrow. - ✓
I will see you tomorrow. - ✗
He arrived on yesterday. - ✓
He arrived yesterday.
Contrast With Similar Patterns
Today、tomorrow、yesterdayは非常に具体的です。もっと一般的にしたい場合はどうしますか？または、日付でより具体的にしたい場合は？そこで、これらの他のパターンが登場します。Today/Tomorrow/Yesterday vs. 曜日Today:I'm going to the gym today.(*この*日に特有)On Monday:I go to the gym on Mondays.(一般的な習慣。毎週月曜日を意味します。) またはI will see you on Monday.(特定の未来の月曜日)。
Yesterday vs. The Day BeforeYesterday:She left yesterday.(今日の直前の日。)The day before: これは*過去*の特定の時点の前の日について話すときに使われます。物語を語るためにもっと使われます。I met her on Tuesday. The day before, I had been really nervous.ここでは、the day beforeは月曜日を意味します。これはより高度です。
Tomorrow vs. The Next DayTomorrow:The package will arrive tomorrow.(今日の直後の日。)The next day:the day beforeのように、これは過去についての物語を語るために使われます。We finished the project on Friday. The next day, we celebrated.ここでは、the next dayは土曜日を意味します。これは未来の出来事に対する過去の視点です。
today、tomorrow、yesterdayをあなたの即時の個人的なタイムラインと考えてください。曜日、the day before、the next dayは、より複雑なまたは繰り返されるタイムラインのためのものです。Quick FAQ
todaysやtomorrowsと言えますか？
いいえ！これらの言葉は決して複数形になりません。常にtoday、tomorrow、yesterdayです。英語がシンプルになる数少ない機会の一つです。楽しみましょう。
なぜ人々はtomorrow morningと言うのにtoday morningと言わないのですか？
素晴らしい質問です！それは奇妙な英語の習慣の一つです。Todayはthisと組み合わさってthis morningになります。Yesterdayも独自の言葉を使います(yesterday morning)。しかし、yesterdayの夜は特別(last night)で、todayの夜も特別(tonight)です。Tomorrowが最も一貫しています：tomorrow morning, tomorrow afternoon, tomorrow night。
I will go tomorrowとI am going tomorrowの違いは何ですか？
どちらも素晴らしいです！I will go tomorrowは事実の簡単な記述またはその瞬間に下された決定です。I am going tomorrow（未来のために現在進行形を使用）は、しばしばそれが固定された計画または手配であることを意味します。たとえば、すでにチケットを持っている場合などです。A0レベルでは、ほとんど同じ意味で使えます。
過去について話すためにtodayを使えますか？
はい、もちろんです！もし出来事が同じ日の早い時間に起こったなら。たとえば、午後8時にこう言えます：I had a big lunch today. ランチは過去に起こりましたが、まだ同じカレンダーの日です。
Verb Agreement with Time Words
| Time Word | Common Verb | Tense | Example |
|---|---|---|---|
|
Yesterday
|
was / did / went
|
Past Simple
|
Yesterday was fun.
|
|
Today
|
is / am / are
|
Present Simple
|
Today is Tuesday.
|
|
Tomorrow
|
is / will be / am going to
|
Future
|
Tomorrow will be sunny.
|
Meanings
Words used to identify a specific day relative to the moment of speaking.
Current Day
The day that is happening right now.
“Today is my birthday.”
“What is the weather today?”
Next Day
The day that will occur after the current day ends.
“See you tomorrow!”
“Tomorrow will be better.”
Previous Day
The day that occurred before the current day started.
“Yesterday was Sunday.”
“I saw him yesterday.”
Reference Table
| 単語 | 意味 | 使い方の例 |
|---|---|---|
|
Today
|
今日（現在）
|
I have class `today`.
|
|
Tomorrow
|
明日（未来）
|
We will meet `tomorrow`.
|
|
Yesterday
|
昨日（過去）
|
She studied `yesterday`.
|
|
Today
|
今の状態
|
What are you doing `today`?
|
|
Tomorrow
|
これからの予定
|
Let's plan for `tomorrow`.
|
|
Yesterday
|
終わったこと
|
Did you see that movie `yesterday`?
|
|
Today
|
前置詞なし
|
I'm busy `today`.
|
|
Tomorrow
|
前置詞なし
|
He leaves `tomorrow`.
|
|
Yesterday
|
前置詞なし
|
They arrived `yesterday`.
|
フォーマル度スペクトル
Are you available for a meeting tomorrow? (Scheduling)
Are you free tomorrow? (Scheduling)
You free tomorrow? (Scheduling)
Link up tomorrow? (Scheduling)
時間のナビゲーション：Today, Tomorrow, Yesterday
現在
- Today The current day
未来
- Tomorrow The day after today
過去
- Yesterday The day before today
時間の単語：使い方クイックガイド
正しい時間の単語の選び方
その動作は「今」起きていますか？
その動作はすでに終わりましたか？
知っている時間の表現
1日の呼び方
- • Today
- • Tomorrow
- • Yesterday
1日の中の時間（もうすぐ学習！）
- • morning
- • afternoon
- • evening
- • night
曜日（もうすぐ学習！）
- • Monday
- • Tuesday
- • Wednesday
レベル別の例文
Today is Monday.
I am happy today.
Yesterday was Sunday.
See you tomorrow!
It is hot today.
Tomorrow is my birthday.
I went to the park yesterday.
Are you working tomorrow?
Today is busier than yesterday.
I didn't see you yesterday.
What are we doing tomorrow?
I have a lot of work today.
Today's world is very digital.
I finished the project yesterday afternoon.
We need to prepare for tomorrow's presentation.
If it rains tomorrow, we will cancel the picnic.
Yesterday, I realized I forgot my keys.
I'll have the answer for you by tomorrow.
Yesterday's news is no longer relevant.
The decisions we make today will shape our tomorrow.
I was under the impression the deadline was yesterday.
Tomorrow marks the tenth anniversary of the company.
Having finished the work yesterday, I can relax today.
The weather forecast for tomorrow looks promising.
In the grand scheme of things, yesterday's failures are today's lessons.
The technology of tomorrow is being developed as we speak.
Should it rain tomorrow, the event will be moved indoors.
Yesterday saw a significant dip in the stock market.
We must not dwell on the ghosts of yesterday.
Today's youth are more socially conscious than ever.
Tomorrow, and tomorrow, and tomorrow, creeps in this petty pace from day to day.
The ephemeral nature of 'today' makes every moment precious.
To speak of 'yesterday' is to invoke a temporal construct that no longer exists.
The project, originally slated for completion yesterday, has been deferred indefinitely.
One might argue that tomorrow is merely a projection of today's anxieties.
Yesterday's avant-garde is today's kitsch.
間違えやすい
Learners use 'today' when they mean the evening hours.
Using 'tomorrow' in stories about the past.
Using 'yesterday night' instead of the standard 'last night'.
よくある間違い
I go yesterday.
I went yesterday.
On tomorrow is my birthday.
Tomorrow is my birthday.
Today morning I eat.
This morning I ate.
Yesterday is Sunday.
Yesterday was Sunday.
I will see you in tomorrow.
I will see you tomorrow.
Yesterday I have seen him.
Yesterday I saw him.
The tomorrow will be better.
Tomorrow will be better.
He said he will come tomorrow (in a past story).
He said he would come the next day.
I am working until tomorrow morning.
I am working until tomorrow.
Yesterday's of the company were better.
The company's past was better.
文型パターン
Today is ___.
I ___ yesterday.
Are you ___ tomorrow?
Yesterday, I should have ___.
Real World Usage
Free tomorrow?
I will send the file today.
Tomorrow: Partly Cloudy
Yesterday's vote changed everything.
Your appointment is tomorrow at 10.
Throwback to yesterday! #TBT
置く場所は自由！
I am busy today.
'On' や 'In' は不要！
I went yesterday.他の時間と言葉をセットに
See you tomorrow morning.
スモールトークの定番
What are you doing today?
Smart Tips
Use 'tonight' instead of 'today evening'. It sounds much more natural.
Switch from 'tomorrow' to 'the next day' to keep the timeline consistent.
Add a comma to give the reader a small 'breath' and emphasize the time.
Remember: Yesterday = Was, Today = Is, Tomorrow = Will be.
発音
Today
The 'o' is a schwa sound /təˈdeɪ/. Don't say 'TOO-day'.
Tomorrow
Stress the second syllable /təˈmɒroʊ/. The first 'o' is also a schwa.
Yesterday
Stress the first syllable /ˈjɛstərdeɪ/.
Time Emphasis
YESTERDAY, I went. (Rising on Yesterday)
Emphasizing that the time is the most important part of the sentence.
暗記しよう
記憶術
Y-T-T: Yesterday (Back), Today (Here), Tomorrow (Front).
視覚的連想
Imagine a sun. Yesterday, the sun set (behind you). Today, the sun is high (above you). Tomorrow, the sun will rise (in front of you).
Rhyme
Yesterday is gone and past, Today is here and moving fast, Tomorrow comes to us at last.
Story
I woke up Yesterday and felt old. I woke up Today and felt bold. I will wake up Tomorrow and be gold.
Word Web
チャレンジ
Write three sentences: one thing you did yesterday, one thing you are doing today, and one thing you will do tomorrow.
文化メモ
In US/UK business culture, 'tomorrow' is a strict deadline. If someone says 'by tomorrow,' they usually mean by 9:00 AM the next day.
The concept of 'Mañana' (tomorrow) can sometimes be more fluid in certain cultures, meaning 'in the future' rather than 'the literal next day'. In English, 'tomorrow' is almost always literal.
The phrase 'That is so yesterday' is a common idiom meaning something is out of style or no longer cool.
From Old English 'to dæge' (today), 'to morgenne' (tomorrow), and 'geostran dæg' (yesterday).
会話のきっかけ
What did you do yesterday?
What are your plans for tomorrow?
How is your day going today?
If you could change one thing you did yesterday, what would it be?
日記のテーマ
よくある間違い
Test Yourself
I will visit my grandma ___.
tomorrow が正解です。正しい文を選んでください：
Yesterday に 'on' は不要です。また、過去のことなので 'went' を使うのが正しいです。Arrange the words in the correct order:
All words placed
Click words above to build the sentence
today を最後に置くと自然です。Score: /3
練習問題
8 exercisesI ___ a movie yesterday.
Today is Wednesday. ___ was Tuesday.
Find and fix the mistake:
I will see you on tomorrow.
busy / I / today / am
1. Yesterday, 2. Today, 3. Tomorrow
Select the natural sentence.
Are you going to the party ___?
___ weather is very cold.
Score: /8
Practice Bank
12 exercisesThe store is closed ___, so I can't buy groceries.
We had a meeting on tomorrow.
正しい文はどれですか？
英語に訳してください： 'Trabajo hoy.' (私は今日働きます)
単語を並べ替えてください：
動作と正しい時間の単語を組み合わせてください：
Did you watch the game ___ night?
Tomorrow I went to the beach.
正しい文はどれですか？
英語に訳してください： 'Ella estudiará mañana.' (彼女は明日勉強するでしょう)
単語を並べ替えてください：
単語とそのカテゴリーを組み合わせてください：
Score: /12
よくある質問 (8)
It is better to say `last night`. While people will understand you, `last night` is the standard expression.
It can be both! In 'Tomorrow is Monday,' it is a noun. In 'I will go tomorrow,' it is an adverb.
Yes, it is common to put a comma after a time word at the beginning: `Yesterday, I went to the store.`
Yes, in a general sense, it can mean 'nowadays' or 'in this era'. Example: `Today, technology is everywhere.`
In English, relative time words like `today`, `tomorrow`, and `yesterday` act as adverbs that already include the 'on' meaning within them.
There isn't a single common word like 'tomorrow'. We just say `the day after tomorrow`.
We say `the day before yesterday`. Some old books use 'ereyesterday,' but no one says that now!
No. `Tomorrow` is for the future. You must use a future verb like 'will' or 'is going to'.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Hoy, Mañana, Ayer
English never uses 'the' with these words (e.g., not 'the tomorrow').
Aujourd'hui, Demain, Hier
French doesn't use prepositions either, making the transition to English easy.
Heute, Morgen, Gestern
English distinguishes 'tomorrow' from 'morning' clearly.
Kyō, Ashita, Kinō
Japanese doesn't require verb tense changes as strictly as English does.
Al-yawm, Ghadan, Ams
Arabic speakers often try to say 'in the tomorrow' because of the preposition 'fi'.
Jīntiān, Míngtiān, Zuótiān
English requires tense agreement (was/is/will be).
