英語で「どっちが大きい？」「一番速いのは？」って比べたいときに使うのが比較表現だよ。原級、比較級、最上級の3つのパターンを覚えれば、テストでも会話でもバッチリ使えるようになる！
英語表現
理科
TOEIC
数学
国語
社会Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
19
•
Updated Mar 26, 2026
•
英語の比較表現を徹底解説
1 / 5
比較表現の基本
比較表現って聞くと難しそうだけど、実は毎日使ってる「同じくらい」「〜より大きい」「一番高い」を英語で言うだけなんだ。原級（as...as）、比較級（...than）、最上級（the...est）の3つがメインパターン。
形容詞や副詞の形を変えるのがポイントで、短い単語は-erや-estをつけて、長い単語（3音節以上）はmoreやmostを前につける。tallなら「taller → tallest」、beautifulなら「more beautiful → most beautiful」って感じだね。
覚えておこう！ yで終わる単語（easy, busyなど）はyをiに変えて「easier → easiest」になるよ
不規則変化は暗記必須！good→better→best、bad→worse→worst、many/much→more→mostは絶対テストに出る。
原級と比較級の使い方
原級（as...as） は「AはBと同じくらい〜」って言いたいときに使う。"Ken is as tall as his father"（ケンはお父さんと同じくらいの身長）みたいに、as + 形容詞の原級 + asで挟むだけ。
否定形は"not as...as"または"not so...as"で「AはBほど〜ではない」になる。"This book is not as interesting as that one"（この本はあの本ほど面白くない）って感じ。
比較級（...than） は「AはBより〜」を表現する。"My bag is heavier than yours"（私のカバンはあなたのより重い）のように、比較級 + thanの形。
強調テクニック！ 差が大きいときはmuch、far、a lotを比較級の前につけて、少しの差ならa littleを使おう
muchをつけると「ずっと」という意味になって、"The sun is much bigger than the Earth"（太陽は地球よりずっと大きい）みたいに強調できる。
最上級をマスターしよう
最上級は「〜の中で一番」を表すときに使って、必ずtheをつけるのが鉄則！形は「the + 最上級 + in/of」で、inとofの使い分けが超重要なんだ。
inを使う場合：場所や集団を表す単数名詞が続く。"Mt. Fuji is the highest mountain in Japan"（富士山は日本で一番高い山）みたいに。ofを使う場合：比較対象となる複数名詞やallが続く。"He is the fastest runner of the three"（彼は3人の中で一番速い走者）って感じ。
超頻出表現「one of the + 最上級 + 複数名詞」は「最も〜なものの一つ」という意味。"Kyoto is one of the most beautiful cities in Japan"（京都は日本で最も美しい都市の一つ）のように、後ろの名詞が複数形になることを絶対忘れちゃダメ！
注意ポイント！ 所有格（my、hisなど）がつくときはtheは不要。"He is my best friend"が正解だよ
テストで絶対ミスしないコツ
テストでよくある間違いを知っておけば、簡単に点数アップできる！最上級のtheのつけ忘れが一番多いミス。"He is fastest runner"じゃなくて"He is the fastest runner"が正解。
moreと-erの重複もNG。"This is more bigger"じゃなくて"This is bigger"だけでOK。どちらか片方だけ使うのがルール。
thanとthenの混同にも注意！thanは比較の「〜よりも」、thenは「その時・それから」の意味。スペルミスで減点されないよう気をつけよう。
重要チェック！ "one of the..."の後ろは必ず複数名詞。"one of the best player"は間違いで、"one of the best players"が正解
ofとinの使い分けも覚えておこう。in + 場所・範囲（単数）、of + 比較対象のグループ（複数）って感じで使い分ける。
試験前の最終チェック
試験前にはこれだけ確認すれば完璧！原級：as...as（〜と同じくらい）、否定はnot as/so...as。比較級：比較級 + than（〜よりも）、強調はmuch、far、a lot。最上級：the + 最上級 + in/of（〜の中で一番）、theを忘れずに！
不規則変化は絶対暗記：good→better→best、bad→worse→worst、many/much→more→mostの3つは完璧にしておこう。
頻出表現「one of the + 最上級 + 複数名詞」（最も〜なものの一つ）もテストの定番。これらのポイントを押さえれば、比較表現はもう怖くない！
最後のアドバイス！ 練習問題をたくさん解いて、パターンに慣れることが一番の近道だよ
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Most popular content in 英語表現
Most popular content
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
英語の比較表現を徹底解説
英語で「どっちが大きい？」「一番速いのは？」って比べたいときに使うのが比較表現だよ。原級、比較級、最上級の3つのパターンを覚えれば、テストでも会話でもバッチリ使えるようになる！
比較表現の基本
比較表現って聞くと難しそうだけど、実は毎日使ってる「同じくらい」「〜より大きい」「一番高い」を英語で言うだけなんだ。原級（as...as）、比較級（...than）、最上級（the...est）の3つがメインパターン。
形容詞や副詞の形を変えるのがポイントで、短い単語は-erや-estをつけて、長い単語（3音節以上）はmoreやmostを前につける。tallなら「taller → tallest」、beautifulなら「more beautiful → most beautiful」って感じだね。
覚えておこう！ yで終わる単語（easy, busyなど）はyをiに変えて「easier → easiest」になるよ
不規則変化は暗記必須！good→better→best、bad→worse→worst、many/much→more→mostは絶対テストに出る。
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
原級と比較級の使い方
原級（as...as） は「AはBと同じくらい〜」って言いたいときに使う。"Ken is as tall as his father"（ケンはお父さんと同じくらいの身長）みたいに、as + 形容詞の原級 + asで挟むだけ。
否定形は"not as...as"または"not so...as"で「AはBほど〜ではない」になる。"This book is not as interesting as that one"（この本はあの本ほど面白くない）って感じ。
比較級（...than） は「AはBより〜」を表現する。"My bag is heavier than yours"（私のカバンはあなたのより重い）のように、比較級 + thanの形。
強調テクニック！ 差が大きいときはmuch、far、a lotを比較級の前につけて、少しの差ならa littleを使おう
muchをつけると「ずっと」という意味になって、"The sun is much bigger than the Earth"（太陽は地球よりずっと大きい）みたいに強調できる。
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
最上級をマスターしよう
最上級は「〜の中で一番」を表すときに使って、必ずtheをつけるのが鉄則！形は「the + 最上級 + in/of」で、inとofの使い分けが超重要なんだ。
inを使う場合：場所や集団を表す単数名詞が続く。"Mt. Fuji is the highest mountain in Japan"（富士山は日本で一番高い山）みたいに。ofを使う場合：比較対象となる複数名詞やallが続く。"He is the fastest runner of the three"（彼は3人の中で一番速い走者）って感じ。
超頻出表現「one of the + 最上級 + 複数名詞」は「最も〜なものの一つ」という意味。"Kyoto is one of the most beautiful cities in Japan"（京都は日本で最も美しい都市の一つ）のように、後ろの名詞が複数形になることを絶対忘れちゃダメ！
注意ポイント！ 所有格（my、hisなど）がつくときはtheは不要。"He is my best friend"が正解だよ
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
テストで絶対ミスしないコツ
テストでよくある間違いを知っておけば、簡単に点数アップできる！最上級のtheのつけ忘れが一番多いミス。"He is fastest runner"じゃなくて"He is the fastest runner"が正解。
moreと-erの重複もNG。"This is more bigger"じゃなくて"This is bigger"だけでOK。どちらか片方だけ使うのがルール。
thanとthenの混同にも注意！thanは比較の「〜よりも」、thenは「その時・それから」の意味。スペルミスで減点されないよう気をつけよう。
重要チェック！ "one of the..."の後ろは必ず複数名詞。"one of the best player"は間違いで、"one of the best players"が正解
ofとinの使い分けも覚えておこう。in + 場所・範囲（単数）、of + 比較対象のグループ（複数）って感じで使い分ける。
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
試験前の最終チェック
試験前にはこれだけ確認すれば完璧！原級：as...as（〜と同じくらい）、否定はnot as/so...as。比較級：比較級 + than（〜よりも）、強調はmuch、far、a lot。最上級：the + 最上級 + in/of（〜の中で一番）、theを忘れずに！
不規則変化は絶対暗記：good→better→best、bad→worse→worst、many/much→more→mostの3つは完璧にしておこう。
頻出表現「one of the + 最上級 + 複数名詞」（最も〜なものの一つ）もテストの定番。これらのポイントを押さえれば、比較表現はもう怖くない！
最後のアドバイス！ 練習問題をたくさん解いて、パターンに慣れることが一番の近道だよ
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
0
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Mock Exam
Quiz
Flashcards
Essay
Most popular content in 英語表現
Most popular content
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user