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Updated Apr 22, 2026

5 pages

受動態の基本的な使い方

受動態って難しく感じるかもしれないけど、実は簡単なルールを覚えるだけで使えるようになるんだ。「〜される」「〜された」という表現で、何がされたかを強調したいときに使う文の形だよ。

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# 受動態の基本

受動態とは何か

「~される」「~された」という意味を表す文の形

*   文の主語が、何かを「する」のではなく、何かを「される」立場にあるとき
    に使う
*   誰がその動作をしたかよりも、何がされたかの方を強調したいときに便利
*   能動態(Act

受動態の基本

受動態は普通の文とは視点が違うんだ。普通の文(能動態)が「誰がする」に注目するのに対して、受動態は「何がされる」に注目する。

例えば「ケンがこのコンピューターを使う」なら、「このコンピューターがケンに使われる」という感じ。誰がやったかより、何がされたかの方が大事なときに便利だよ。

基本の形はこれだけ覚えればOK:主語 + be動詞 + 過去分詞 +by行為者+ by行為者。be動詞は主語と時制によって変わるから、現在形なら am/is/are、過去形なら was/were を使う。

💡 ポイント: 過去分詞は動詞の3番目の形(write-wrote-written の written)。不規則動詞はしっかり覚えておこう!

# 受動態の基本

受動態とは何か

「~される」「~された」という意味を表す文の形

*   文の主語が、何かを「する」のではなく、何かを「される」立場にあるとき
    に使う
*   誰がその動作をしたかよりも、何がされたかの方を強調したいときに便利
*   能動態(Act

能動態から受動態への書きかえ

書きかえは3つのステップで完璧にできる。テストでもこの順番通りにやれば間違えないよ。

ステップ1: 能動態の目的語(動詞の後ろの「〜を」)を、受動態の主語にする。ステップ2: 動詞を「be動詞 + 過去分詞」に変える。be動詞は新しい主語と時制に合わせよう。

ステップ3: 元の主語を「by + 行為者」にして文末に置く。代名詞なら目的格に変えるのを忘れずに(I → by me、He → by him)。

💡 コツ: 「My father built this house」→「This house was built by my father」みたいに、文の構造がガラッと変わるイメージを持とう!

# 受動態の基本

受動態とは何か

「~される」「~された」という意味を表す文の形

*   文の主語が、何かを「する」のではなく、何かを「される」立場にあるとき
    に使う
*   誰がその動作をしたかよりも、何がされたかの方を強調したいときに便利
*   能動態(Act

例文で練習してみよう

実際の例文で書きかえをやってみると、パターンが見えてくるよ。

現在形の例: 「Emi writes these letters」→「These letters are written by Emi」。主語が複数形(these letters)だから、be動詞は are になる。

過去形の例: 「My father built this house」→「This house was built by my father」。新しい主語が単数形だから、be動詞は was を使う。

書きかえのときは、まず元の文の主語・動詞・目的語を見つけることから始めよう。それができれば、あとは機械的に変換するだけだ。

💡 確認ポイント: be動詞の形と過去分詞の形、この2つが正しければ8割は成功!

# 受動態の基本

受動態とは何か

「~される」「~された」という意味を表す文の形

*   文の主語が、何かを「する」のではなく、何かを「される」立場にあるとき
    に使う
*   誰がその動作をしたかよりも、何がされたかの方を強調したいときに便利
*   能動態(Act

テストで注意するポイント

テストでよくある間違いを知っておけば、確実に点数アップできる。

一番多い間違いは be動詞を忘れること。「This car made in Japan」じゃなくて「This car is made in Japan」が正解。be動詞がないと文として成り立たないんだ。

be動詞の形にも注意。主語が複数なら are、単数なら is/was。「The rooms is cleaned」は間違いで、「The rooms are cleaned」が正解だよ。

「by + 行為者」の省略も覚えておこう。行為者が分からないときや、言う必要がないときは by〜 を省略することが多い(例:English is spoken in many countries)。

💡 最重要: 「be動詞 + 過去分詞」のセットを絶対に忘れないこと!これさえ覚えていれば大丈夫。

# 受動態の基本

受動態とは何か

「~される」「~された」という意味を表す文の形

*   文の主語が、何かを「する」のではなく、何かを「される」立場にあるとき
    に使う
*   誰がその動作をしたかよりも、何がされたかの方を強調したいときに便利
*   能動態(Act

まとめ(要点チェック)

受動態の核心部分を最終確認しよう。

基本形: 主語 + be動詞 + 過去分詞 +by行為者+ by行為者で、意味は「〜される」「〜された」。be動詞は主語と時制で使い分け、過去分詞は不規則動詞もしっかり覚える。

書きかえでは能動態の目的語が受動態の主語になることを忘れずに。by の省略は行為者が不明・不要なときに使う。

とにかく「be動詞 + 過去分詞」のセットが受動態の命。この形さえマスターすれば、英語の表現力がグッと広がるよ!

💡 自信を持って: ルールはシンプルだから、練習すれば必ずできるようになる。一歩ずつ進んでいこう!



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

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

 

英語表現

2

Updated Apr 22, 2026

5 pages

受動態の基本的な使い方

受動態って難しく感じるかもしれないけど、実は簡単なルールを覚えるだけで使えるようになるんだ。「〜される」「〜された」という表現で、何がされたかを強調したいときに使う文の形だよ。

# 受動態の基本

受動態とは何か

「~される」「~された」という意味を表す文の形

*   文の主語が、何かを「する」のではなく、何かを「される」立場にあるとき
    に使う
*   誰がその動作をしたかよりも、何がされたかの方を強調したいときに便利
*   能動態(Act

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

受動態の基本

受動態は普通の文とは視点が違うんだ。普通の文(能動態)が「誰がする」に注目するのに対して、受動態は「何がされる」に注目する。

例えば「ケンがこのコンピューターを使う」なら、「このコンピューターがケンに使われる」という感じ。誰がやったかより、何がされたかの方が大事なときに便利だよ。

基本の形はこれだけ覚えればOK:主語 + be動詞 + 過去分詞 +by行為者+ by行為者。be動詞は主語と時制によって変わるから、現在形なら am/is/are、過去形なら was/were を使う。

💡 ポイント: 過去分詞は動詞の3番目の形(write-wrote-written の written)。不規則動詞はしっかり覚えておこう!

# 受動態の基本

受動態とは何か

「~される」「~された」という意味を表す文の形

*   文の主語が、何かを「する」のではなく、何かを「される」立場にあるとき
    に使う
*   誰がその動作をしたかよりも、何がされたかの方を強調したいときに便利
*   能動態(Act

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

能動態から受動態への書きかえ

書きかえは3つのステップで完璧にできる。テストでもこの順番通りにやれば間違えないよ。

ステップ1: 能動態の目的語(動詞の後ろの「〜を」)を、受動態の主語にする。ステップ2: 動詞を「be動詞 + 過去分詞」に変える。be動詞は新しい主語と時制に合わせよう。

ステップ3: 元の主語を「by + 行為者」にして文末に置く。代名詞なら目的格に変えるのを忘れずに(I → by me、He → by him)。

💡 コツ: 「My father built this house」→「This house was built by my father」みたいに、文の構造がガラッと変わるイメージを持とう!

# 受動態の基本

受動態とは何か

「~される」「~された」という意味を表す文の形

*   文の主語が、何かを「する」のではなく、何かを「される」立場にあるとき
    に使う
*   誰がその動作をしたかよりも、何がされたかの方を強調したいときに便利
*   能動態(Act

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

例文で練習してみよう

実際の例文で書きかえをやってみると、パターンが見えてくるよ。

現在形の例: 「Emi writes these letters」→「These letters are written by Emi」。主語が複数形(these letters)だから、be動詞は are になる。

過去形の例: 「My father built this house」→「This house was built by my father」。新しい主語が単数形だから、be動詞は was を使う。

書きかえのときは、まず元の文の主語・動詞・目的語を見つけることから始めよう。それができれば、あとは機械的に変換するだけだ。

💡 確認ポイント: be動詞の形と過去分詞の形、この2つが正しければ8割は成功!

# 受動態の基本

受動態とは何か

「~される」「~された」という意味を表す文の形

*   文の主語が、何かを「する」のではなく、何かを「される」立場にあるとき
    に使う
*   誰がその動作をしたかよりも、何がされたかの方を強調したいときに便利
*   能動態(Act

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

テストで注意するポイント

テストでよくある間違いを知っておけば、確実に点数アップできる。

一番多い間違いは be動詞を忘れること。「This car made in Japan」じゃなくて「This car is made in Japan」が正解。be動詞がないと文として成り立たないんだ。

be動詞の形にも注意。主語が複数なら are、単数なら is/was。「The rooms is cleaned」は間違いで、「The rooms are cleaned」が正解だよ。

「by + 行為者」の省略も覚えておこう。行為者が分からないときや、言う必要がないときは by〜 を省略することが多い(例:English is spoken in many countries)。

💡 最重要: 「be動詞 + 過去分詞」のセットを絶対に忘れないこと!これさえ覚えていれば大丈夫。

# 受動態の基本

受動態とは何か

「~される」「~された」という意味を表す文の形

*   文の主語が、何かを「する」のではなく、何かを「される」立場にあるとき
    に使う
*   誰がその動作をしたかよりも、何がされたかの方を強調したいときに便利
*   能動態(Act

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

まとめ(要点チェック)

受動態の核心部分を最終確認しよう。

基本形: 主語 + be動詞 + 過去分詞 +by行為者+ by行為者で、意味は「〜される」「〜された」。be動詞は主語と時制で使い分け、過去分詞は不規則動詞もしっかり覚える。

書きかえでは能動態の目的語が受動態の主語になることを忘れずに。by の省略は行為者が不明・不要なときに使う。

とにかく「be動詞 + 過去分詞」のセットが受動態の命。この形さえマスターすれば、英語の表現力がグッと広がるよ!

💡 自信を持って: ルールはシンプルだから、練習すれば必ずできるようになる。一歩ずつ進んでいこう!

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.

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Most popular content in 英語表現

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