シャドーイング練習: National Geographic Reading Explorer 1 Unit 11 Our Plastic World - 動画で英語スピーキングを学ぶ
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24 文
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1
Plastic is everywhere.
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Almost everything we use today is made of plastic.
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But how is plastic made?
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Most of the plastics we use today are synthetic.
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Synthetic plastics are made from fossil fuels like oil.
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Every year, world production of plastic increases.
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Since 1950, mankind has made about 9.2 billion tons of plastics.
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That's nearly the same weight as 1,600 Great Pyramids of Giza.
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The problem is, much of this plastic ends up as trash,
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especially single-use plastics like straws, grocery bags, and packaging products.
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Single-use plastics make up about 40% of all plastic waste.
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They end up ruining our oceans.
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wildlife, and polluting communities around the world.
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But we can take action to help stop this.
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For example, we can use fewer single-use plastic items in our day-to-day lives.
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By simply choosing to use reusable alternatives, each person can make a huge impact in decreasing plastic waste.
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Another way to reduce plastic pollution is by developing bioplastics, plastics made from plants.
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These forks are made from a type of plant.
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Bioplastics can break down much faster than synthetic plastics, in weeks instead of hundreds of years.
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Scientists are also using materials like rubber to make bioplastics.
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The sap from this rubber tree can be used to make all kinds of things, such as gloves, tires, and mattresses.
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Plastic is present in almost every aspect of modern life.
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But by reducing the amount of plastic we use and throw away, and by producing more bioplastics,
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we can help save the planet.
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このレッスンの語彙とスピーキングのポイント
このB1レベルのスピーキングレッスンは、動画「National Geographic Reading Explorer 1 Unit 11 Our Plastic World」を教材にしています。 繰り返し出てくる語は次のとおりです：plastic, bioplastics, synthetic。 この動画には、シャドーイング用の文が24文、単語が252語あります。 音声の長さは2:46です。 話す速さはゆっくりで、1分あたり約91語です。一つ一つの音をまねる余裕があります。 英語の頻出3,000語に含まれる単語は81%だけなので、語彙は難しめです。
この動画の重要語彙
動画の中で特に難しい単語14語を、発音と意味つきで紹介します。
| 単語 | 発音 | 意味 |
|---|---|---|
| rubber 名詞 | /ˈɹʌbɚ/ | ゴム |
| mattress 名詞 | /ˈmætɹɪs/ | 布団, マットレス |
| glove 名詞 | /ɡlʌv/ | 手袋 |
| mankind 名詞 | /mænˈkaɪnd/ | 人類, 人間 |
| straw 名詞 | /stɹɔ/ | 藁, ワラ |
| fossil 名詞 | /ˈfɑsl̩/ | 化石 |
| tire 動詞 | /ˈtaɪ̯ɚ/ | 疲れる |
| fork 名詞 | /fɔɹk/ | フォーク |
| decrease 動詞 | /dɪˈkɹiːs/ | 減少する, 減る |
| pollution 名詞 | /pəˈluʃən/ | 汚染 |
| scientist 名詞 | /ˈsaɪəntəst/ | 科学者 |
| ton 名詞 | /tʌn/ | トン |
| ruin 名詞 | /ˈɹuː.ɪn/ | 廃墟, 遺跡 |
| wildlife 名詞 | /ˈwaɪldlaɪf/ | 野生動物 |
動画に出てくる句動詞
| 単語 | 意味 |
|---|---|
| throw away 動詞 | 棄てる, 捨てる |
注意したい発音
日本語話者が苦手な音：
- /f/ — 「フ」ではなく、上の歯と下唇で出す: fossil /ˈfɑsl̩/, fork /fɔɹk/, fewer /ˈfjuː.ɚ/, wildlife /ˈwaɪldlaɪf/
- 子音の連続 — 間に母音を入れない: glove /ɡlʌv/, mankind /mænˈkaɪnd/, straw /stɹɔ/, fork /fɔɹk/, grocery /ˈɡɹəʊ.s(ə.)ɹi/
この動画での練習方法
- まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
- 通常の速度で一文ずつシャドーイングし、話し手のリズムに合うまで繰り返します。
- 自分の声を録音して元の音声と比べます。rubber, mattress, gloveなどの単語に特に注意しましょう。
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。