シャドーイング練習: What Happened to the Dinosaurs? - 動画で英語スピーキングを学ぶ

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58 文
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Clues, clues, lookin’ for clues… Oh!
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It’s you! Hi!
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You were probably expecting Jessi, right?
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Well, she and Squeaks will be back next time, but right now they're off doing a bit of detective work in Yucatán, Mexico!
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You might say they’ve flown south for the winter.
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And of course I approve of that!
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Very bird-like of them.
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You see, we teamed up because we got curious about one of the greatest mysteries of all time: What happened to the dinosaurs?
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If you know me, you know that I loooove dinosaurs.
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And a long time ago — around 65 million years! — the dinosaurs were large and in charge.
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They had ruled the Earth for over 160 million years.
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And then, something strange happened, not just to dinosaurs, but to over half the Earth's species.
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That means a type of living thing, like oak trees, or cuckoo birds like me, or humans like you.
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All at once, about 65 million years ago, a bunch of different species just went extinct — they were completely wiped out!
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That’s because something big happened, causing huge changes on Earth.
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Changes in the weather, changes in the oceans … changes that made it harder for dinosaurs and other living things to find food and survive.
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Sure sounds mysterious!
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Most species will go extinct sometime, but what I wanna know is: What happened?
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What caused so many species – from tiny ocean creatures to big land reptiles like T-rex and Triceratops – to all go extinct at the same time?
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Scientists don’t know for sure, but they have a few different guesses.
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Some scientists think it happened because of a giant rock moving through space, called an asteroid, that crashed into the Earth.
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As it happens, that’s just what Jessi and Squeaks went to Mexico to learn more about!
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And Jessi’s giving us a call right now!
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How’s your vacation, Jessi?
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Jessi: Terrific, Dino!
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Squeaks and I are here at the Yucatán Peninsula in Mexico, and we’re learning so much!
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We learned that 65 million years ago, an asteroid blasted in from outer space and landed right here!
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This asteroid was enormous — it was 12 kilometers wide, so big that it would take hours just to walk from one side to the other.
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And when it landed, the explosion left an even bigger crater — a big bowl-shaped dent in the Earth.
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It’s called the Chicxulub crater, and it’s about 150 kilometers wide.
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The explosion sent lots of rocks and other debris raining down on anything nearby.
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And it sent billions of tons of soot into the air!
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Soot is the dusty stuff that’s left over when something burns up, Dino: That's one powerful explosion!
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Jessi: It sure was!
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It made the whole world really hot for a few days.
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And it started fires, giant waves, and huge, strong winds; and it shook the Earth, in a super powerful earthquake!
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Dino: Thanks for the hot tips, Jessi.
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Enjoy the rest of your trip!
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Now, some scientists think that the explosion from the asteroid sent so much soot into the air that it blocked out the Sun.
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For a while, it was really dark outside, even during the day!
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And without sunshine, it started to get cold, which meant some of the living things that were used to warmer weather couldn’t survive.
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There was another problem, too: plants need sunlight to live, so a lot of the plants back then died.
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Without plants, the animals that ate plants didn't have enough food, and without enough plant-eaters, the animals that ate meat went hungry too.
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That’s why some scientists think the asteroid was what caused the dinosaurs to go extinct!
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But other scientists think there may have been another cause, and that even before that asteroid crashed into the Earth, disaster was in the air for the dinosaurs.
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And they think the culprit was ... volcanoes!
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Because right around the time that the dinosaurs went extinct, one of the biggest volcanic eruptions in history was underway, in the area of the world that’s now India.
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For close to a million years, eruptions sent rocks and dust and soot onto the land and into the air.
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Just like with the asteroid impact, all this stuff in the air would have blocked out the Sun, making the Earth cooler and darker.
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So we don’t know for sure what darkened the skies and wiped out all those species — it could have been the asteroid, or it could have been the volcanoes, or both!
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We have so many clues, but the true culprit is going to remain a mystery... for now.
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Either way, the dinosaurs were pretty unlucky!
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A lot of things went very wrong for them, all at the same time.
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But even though life was hard, some types of plants and animals were able to find food and shelter while the Earth was changing, and they survived!
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Whatever happened all those years ago, life on Earth goes on, and we’re all here, solving mysteries together!
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Do you have any big mysteries you’re wondering about?
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Ask a grownup to help you and leave a comment below, or send us an email at [email protected].
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And if you want to join us next time, hit that subscribe button!

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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A2レベルのスピーキングレッスンは、動画「What Happened to the Dinosaurs?」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：dinosaurs, Earth, asteroid, Jessi, plant。 この動画には、シャドーイング用の文が58文、単語が870語あります。 音声の長さは4:28です。 話す速さは速く、1分あたり約194語です。音のつながりや弱く発音される音が多くなります。 単語の81%は英語の頻出3,000語に含まれます。残りは練習の前に確認しておきましょう。

この動画の重要語彙

動画に出てくる覚えておきたい単語15語を、発音と意味つきで紹介します。

単語発音意味
dinosaur 名詞/ˈdaɪnəsoɹ/恐竜
asteroid 名詞/ˈæst(ə)ɹɔɪd/小惑星
scientist 名詞/ˈsaɪəntəst/科学者
extinct 形容詞/ɪkˈstɪŋkt/消えた
mystery 名詞/ˈmɪs.t(ə.)ɹi/ミステリー, 不思議
explosion 名詞/ɛkˈsploʊ.ʒən/爆発
clue 名詞/kluː/手掛かり, 切っ掛け
wipe 動詞/waɪp/拭く
volcano 名詞/vɑlˈkeɪ.noʊ/火山
crater 名詞/ˈkɹeɪ.tɚ/クレーター, 隕石孔
eruption 名詞/ɪˈɹʌpʃən/噴火, 噴出
curious 形容詞/ˈkjʊɹ.i.əs/好奇心の強い, 知りたがる
hungry 形容詞/ˈhʌŋ.ɡɹi/空腹な, 飢えた
solve 動詞/sɒlv/解決する
dust 名詞/dʌst/埃, ほこり

動画に出てくる句動詞

単語意味
wipe out 動詞一掃する

この動画の文法

話し手がよく使っている文型を、動画の実際の表現とともに紹介します。

文型動画での表現
過去進行形 was/were + -ing — 過去のある時点で進行中だった動作were probably expecting · was changing
「might / may」による可能性 might/may + 動詞 — 起こりうるが確実ではないことmight say · may have
最上級 the -est / the most … — グループの中で一番the greatest · the biggest
現在進行形 am/is/are + -ing — 今まさに、または最近起きていることwe're learning · you're wondering

注意したい発音

話し手はdon't, we're, couldn'tなど、短縮形や弱形を10回使っています。聞こえたとおりの短い形で発音しましょう。

  • 「sh」と「zh」の音: explosion /ɛkˈsploʊ.ʒən/, eruption /ɪˈɹʌpʃən/, vacation /veɪˈkeɪ.ʃən/, shake /ˈʃeɪk/, shelter /ˈʃɛltə/

日本語話者が苦手な音：

  • /r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: culprit /ˈkʌlpɹɪt/, reptile /ˈɹɛp.taɪl/
  • /v/ — /b/ にならないように、上の歯を下唇に当てる: volcano /vɑlˈkeɪ.noʊ/, solve /sɒlv/, vacation /veɪˈkeɪ.ʃən/, detective /dɪˈtɛktɪv/, approve /əˈpɹuːv/
  • 子音の連続 — 間に母音を入れない: scientist /ˈsaɪəntəst/, extinct /ɪkˈstɪŋkt/, explosion /ɛkˈsploʊ.ʒən/, clue /kluː/, crater /ˈkɹeɪ.tɚ/

この動画での練習方法

  1. 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。
  2. まず0.75倍速で一文ずつシャドーイングし、慣れてきたら通常の速度に戻します。
  3. 自分の声を録音して元の音声と比べます。dinosaur, asteroid, scientist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。

シャドーイングのやり方: ステップ別の完全ガイドを読む →